Symbol power tracking power supply, symbol power tracking amplification system and symbol voltage regulation method

Abstract

Provided in the present application are a symbol power tracking power supply, a symbol power tracking amplification system, and a symbol voltage regulation method. The symbol power tracking power supply comprises a power supply topology, a plurality of switched capacitors, and a plurality of switch units. Each switched capacitor is coupled between the power supply topology and a load, and each switch unit is coupled between one switched capacitor and the load, the voltage levels of the switched capacitors being different; the power supply topology is configured to supply power to the load in one signal period by means of one switched capacitor among the plurality of switched capacitors; each switch unit comprises at least one field effect transistor, and the at least one field effect transistor is configured to connect one switched capacitor to the load. Within a cyclic prefix time slot of one signal period, at least one field effect transistor operates in a constant current region. By means of the field effect transistor operating in the constant current region, the present application can limit the switched current between the switched capacitor and the load, thereby improving operating performance and service life of the symbol power tracking power supply.

Description

Symbol power tracking power supply, symbol power tracking amplification system and symbol voltage regulation method

[0001] CROSS-REFERENCE TO RELATED APPLICATIONS

[0002] This application claims priority to the Chinese patent application No. 202411313573.X, filed on September 20, 2024, entitled “Symbol power tracking power supply, symbol power tracking amplification system and symbol voltage regulation method”, the entire content of which is incorporated herein by reference. TECHNICAL FIELD

[0003] The present application relates to the field of communication technology, in particular to a symbol power tracking power supply, a symbol power tracking amplification system and a symbol voltage regulation method. BACKGROUND

[0004] The symbol power tracking amplification system usually carries the symbol power tracking power supply to provide the power supply voltage for the power amplifier to drive the power amplifier to amplify the radio frequency input signal and improve the transmission quality of the signal. FIG. 1 is a plan structure schematic diagram of the existing symbol power tracking amplification system 1000’, as shown in FIG. 1, the radio frequency circuit 105’ in the existing symbol power tracking amplification system 1000’ generates the radio frequency input signal RF IN ’ and provides it to the power amplifier 104’, the power amplifier 104’ is used to amplify the radio frequency input signal RF IN ’ generated by the radio frequency circuit 105’ and generate the radio frequency output signal RF OUT ’ output, the symbol power tracking power supply 10’ is used to track the radio frequency input signal RF IN ’ generated by the radio frequency circuit 105’ and provide different sizes of power supply voltage V PA ’.

[0005] FIG. 2 is a working principle schematic diagram of the symbol voltage regulation of the existing symbol power tracking power supply 10’, as shown in FIG. 2, the radio frequency input signal RF IN ’ generated by the radio frequency circuit 105’ includes a plurality of signal periods T’, and the plurality of signal periods T’ are output continuously. Wherein, each signal period T’ includes a cyclic prefix CP’ (cyclic prefix, CP) and a symbol period Symbol’, and the cyclic prefix CP’ in each signal period T’ is located before the symbol period Symbol’. For example, the radio frequency input signal RF INThe signal consists of a first signal period T1' and a second signal period T2', which occur sequentially. The first signal period T1' includes a first cyclic prefix CP1' and a first symbol period Symbol1', and the second signal period T2' includes a second cyclic prefix CP2' and a second symbol period Symbol2'. Within the time slot of the first symbol period Symbol1', the power amplifier 104' requires a supply voltage V... PA ' is the first voltage value V PA 1'. During the second symbol period Symbol2' time slot, the power amplifier 104' requires a supply voltage V. PA ' is the second voltage value V PA 2', First voltage value V PA 1' RF input signal generated by bonding RF circuit 105' IN The envelope of the first signal period T1, and the second voltage value V PA RF input signal generated by 2' bonding RF circuit 105' IN The envelope of the second signal period T2. The symbolic power tracking power supply 10' is used to adjust the supply voltage V during the first cyclic prefix CP1' time slot of the first signal period T1'. PA 'To the first voltage value V PA 1', and maintain the supply voltage V during the time slot of Symbol1' in the first symbol period. PA ' is the first voltage value V PA 1' remains unchanged. The symbolic power tracking power supply 10' is used to supply voltage V during the second cyclic prefix CP2' time slot of the second signal period T2'. PA 'From the first voltage value V PA 1' Adjust to the second voltage value V PA 2', and maintain the supply voltage V during the second symbol period Symbol2' time slot. PA ' is the second voltage value V PA 2' remains unchanged to achieve the RF input signal RF generated by tracking RF circuit 105'. IN Adjust the supply voltage V supplied to power amplifier 104 PA The effect of '.

[0006] However, when the existing symbol power tracking power supply 10' adjusts the supply voltage provided to the power amplifier 104', due to excessive transient current stress at the beginning of the cyclic prefix CP' time slot, the output bus may have a large overshoot and undershoot, which may cause high-frequency resonance in the circuit, resulting in poor performance and efficiency of the existing symbol power tracking power supply 10', and the reliability of the existing symbol power tracking amplification system 1000' is difficult to guarantee. In order to limit the transient current of the existing symbol power tracking power supply 10' at the beginning of the cyclic prefix CP' time slot, different drive resistors are generally selected to adjust the slope of the drive signal to achieve current limiting effect for different switched capacitance voltage difference conditions. However, the drive resistor value design in this way is difficult and the limiting effect is not good, and it is not possible to realize low resistance conduction in the symbol period Symbol' time slot, so as to balance current limiting and steady-state efficiency. SUMMARY

[0007] The present application provides a symbol power tracking power supply, by optimizing the internal circuit structure design of the symbol power tracking power supply, the impact current during switching of the switching unit and the coupling between the switched current and the load can be limited, thereby improving the working performance and life of the symbol power tracking power supply. The present application also provides a symbol power tracking amplification system and a symbol voltage regulation method. The present application specifically includes the following technical solutions:

[0008] In a first aspect, the present application provides a symbol power tracking power supply for providing a supply voltage to a load, comprising a power supply topology, a plurality of switched capacitors, and a plurality of switching units. Each switched capacitor is coupled between the power supply topology and the load, and each switching unit is coupled between one switched capacitor and the load. Each switched capacitor has a different voltage level. The power supply topology is configured to supply power to the load through one of the plurality of switched capacitors in a signal period. Each switching unit includes at least one field effect transistor, and the at least one field effect transistor is configured to turn on one switched capacitor and the load. In the cyclic prefix time slot of the signal period, the at least one field effect transistor operates in the constant current region.

[0009] The symbol power tracking power supply adjusts the voltage level of the supply voltage provided by the power supply topology to the load to the voltage level required by the load by switching the one switching capacitor to charge or discharge the load in the cyclic prefix time slot of one signal period when the load is powered by the one switching capacitor. The field effect transistor in the switching unit works in the constant current region, so that the one switching capacitor coupled to the load can form a current limiting effect on the charging current of the switching capacitor, thereby limiting the current peak value during hard charging of the switching capacitor and suppressing the overshoot oscillation, to improve the working performance and service life of the internal functional structure device of the symbol power tracking power supply. That is, the symbol power tracking power supply limits the transient current of the hard charging of the capacitor without sacrificing the steady-state efficiency of the circuit, while suppressing the up and down of the voltage of the output bus between the voltage regulating final state switching capacitor and the load, further improving the working reliability of the symbol power tracking power supply.

[0010] An implementation, each switching unit includes one field effect transistor, and one field effect transistor is coupled between one switching capacitor and the load, wherein in the symbol period time slot of one signal period, one field effect transistor works in the variable resistance region.

[0011] In the present implementation, when only one field effect transistor is used as a switching device between one switching capacitor and the load, the number of internal functional devices of the symbol power tracking power supply can be reduced, and the preparation cost of the symbol power tracking power supply can be reduced. The field effect transistor works in the constant current region in the cyclic prefix time slot, so that the switching capacitor adjusts the voltage level of the supply voltage provided to the load to the voltage level required by the load. When the field effect transistor works in the variable resistance region in the symbol period time slot, the voltage level of the supply voltage provided by the switching capacitor to the load remains unchanged. Since the field effect transistor has the characteristic of low resistance conduction when it works in the variable resistance region. Therefore, the field effect transistor can turn on the switching capacitor to the load with lower resistance, and by reducing the on-resistance between the switching capacitor and the load, the steady-state circuit efficiency can be improved.

[0012] An implementation, the switching unit further includes an auxiliary source circuit, the auxiliary source circuit is configured to provide a first driving voltage and a second driving voltage, the first driving voltage is configured to drive one field effect transistor to work in the constant current region, and the second driving voltage is configured to drive the field effect transistor to work in the variable resistance region.

[0013] In the present implementation, the auxiliary source circuit in each switching unit is coupled with the field effect transistor, and the auxiliary source circuit is configured to provide driving voltages of different voltage levels to drive the field effect transistor to work in different characteristic regions. The driving chip can provide different driving signals to the field effect transistor, so that the field effect transistor works in different characteristic regions to achieve different conduction effects.

[0014] In an implementation, a voltage level of the first driving voltage is lower than a voltage level of the second driving voltage.

[0015] In the implementation, the voltage level of the first driving voltage is lower than the voltage level of the second driving voltage. Therefore, the first driving voltage is relatively low, and the field effect transistor can be driven to work in the constant current region, so that the field effect transistor can form a current limiting effect. The second driving voltage is high, and the field effect transistor can be driven to work in the variable resistance region, so that the field effect transistor can form a low resistance conduction effect.

[0016] In an implementation, the auxiliary power supply circuit includes two power supply branches, one of which is used to provide the first driving voltage, and the other of which is used to provide the second driving voltage, wherein the two power supply branches are connected in parallel, one of the power supply branches is turned on and the other is turned off in the cyclic prefix time slot of a signal period, and one of the power supply branches is turned off and the other is turned on in the symbol period time slot of the signal period.

[0017] In the implementation, the two power supply branches are alternately turned on and turned off in the cyclic prefix time slot and the symbol voltage adjustment time slot, respectively, so that driving voltages with different voltage levels can be provided to the driving chip in different time slots of a signal period, so that the driving chip can control the field effect transistor to work in different characteristic regions. That is, when the field effect transistor is switched on to couple the capacitance and the load, the field effect transistor forms a current limiting effect in the cyclic prefix time slot, and stabilizes the voltage in the symbol period time slot, so as to balance the transient current limiting effect and the steady state circuit efficiency.

[0018] In an implementation, the auxiliary power supply circuit further includes an isolation auxiliary power supply and a linear voltage regulator, the isolation auxiliary power supply is used to provide the second driving voltage to the two power supply branches, and the linear voltage regulator is connected in series in one of the power supply branches, and is used to convert the second driving voltage into the first driving voltage.

[0019] In the implementation, the linear voltage regulator is further coupled between the isolation auxiliary power supply and the driving chip, and is connected in series in one of the power supply branches. The linear voltage regulator can convert the voltage level of the driving voltage provided by the isolation auxiliary power supply to the power supply branch into another voltage level. That is, by adding a linear voltage regulator to the power supply branch, the driving chip can be provided with driving voltages with different voltage levels by one isolation auxiliary power supply, so as to meet the conduction requirements of the field effect transistor, reduce the number and space of the isolation auxiliary power supplies, and thus simplify the internal design of the symbol power tracking power supply and realize the miniaturization design of the symbol power tracking power supply.

[0020] In an implementation, each switch unit includes two field effect transistors connected in parallel, wherein, in a cyclic prefix time slot of a signal period, one field effect transistor operates in a constant current region and the other field effect transistor is turned off, and in a symbol period time slot of the signal period, one field effect transistor operates in a constant current region or is turned off and the other field effect transistor operates in a variable resistance region.

[0021] In the implementation, each switch unit includes two field effect transistors connected in parallel between a switching capacitor and a load, thereby forming two conducting branches between the switching capacitor and the load. By forming the two conducting branches between the switching capacitor and the load, the conducting and turning off of the two conducting branches are controlled in the cyclic prefix time slot and the symbol period time slot, respectively, so that different conducting effects are formed between the switching capacitor and the load. In other words, in the cyclic prefix time slot, one field effect transistor operates in a constant current region and the other field effect transistor is turned off, so that a limiting effect is formed on the switching current in the cyclic prefix time slot. In the symbol period time slot, both field effect transistors are turned on, and the other field effect transistor operates in a variable resistance region, so that the steady-state efficiency of the circuit is improved. By controlling the conducting and turning off of the two conducting branches by the two field effect transistors in different time slots of a signal period, respectively, the conducting resistance at the beginning of the symbol period time slot is reduced, and the conducting efficiency of the field effect transistor is improved. At the same time, by the cooperation of the two field effect transistors in different time slots, the reliability of the symbol power tracking power supply is improved, and the failure risk of the symbol power tracking power supply is reduced.

[0022] In an implementation, at least one field effect transistor is a linear field effect transistor.

[0023] In the implementation, the linear field effect transistor has a wide linear region, and by setting the linear field effect transistor as the main power switch between the switching capacitor and the load, the current peak for hard charging the switching capacitor can be limited, the current limiting accuracy of the field effect transistor is improved, and the case that the limiting effect is affected by the device parameter error or the temperature influence on the device is avoided. That is, by setting the switching device between the switching capacitor and the load as the linear field effect transistor, the current limiting accuracy is improved, the overshoot ringing is further suppressed, and the working reliability of the symbol power tracking power supply is improved. At the same time, by setting the switching device between the switching capacitor and the load as the linear field effect transistor, compared with the closed-loop scheme, the voltage or current detection circuit with high accuracy and bandwidth requirements can be omitted, thereby the internal structure design of the symbol power tracking power supply is simplified and the internal structure complexity is reduced.

[0024] In an implementation, when at least one field effect transistor of one switch unit of the plurality of switch units is turned on to couple one of the switching capacitors and the load, the remaining switch units of the plurality of switch units are all turned off to couple the switching capacitors and the load corresponding thereto.

[0025] In the present implementation, one switch unit corresponds to one switching capacitor, and the on or off of the coupling between one switching capacitor and the load is controlled by each switch unit respectively, so that the precise voltage regulation of the symbol power tracking power supply can be realized, and the working performance and service life of the internal functional devices of the symbol power tracking power supply can be improved.

[0026] In a second aspect, the present application provides a symbol power tracking amplification system, which comprises a radio frequency circuit, a power amplifier and a symbol power tracking power supply. The radio frequency circuit is configured to generate a radio frequency input signal. The power amplifier is configured to amplify the radio frequency input signal generated by the radio frequency circuit. The symbol power tracking power supply comprises a power supply topology, a plurality of switching capacitors and a plurality of switch units. Each switching capacitor is coupled between the power supply topology and the power amplifier. Each switch unit is coupled between one switching capacitor and the power amplifier. The voltage levels of each switching capacitor are different. The power supply topology tracks the radio frequency input signal generated by the radio frequency circuit, and provides a power supply voltage for the power amplifier through one switching capacitor in the plurality of switching capacitors in one signal period of the radio frequency input signal generated by the radio frequency circuit. The voltage level of one switching capacitor matches the envelope of the radio frequency input signal generated by the radio frequency circuit. Each switch unit comprises at least one field effect transistor. The at least one field effect transistor is configured to turn on one switching capacitor and the power amplifier. In a cyclic prefix time slot of one signal period, the at least one field effect transistor works in a constant current region.

[0027] In the symbol power tracking amplification system, the radio frequency input signal generated by the radio frequency circuit is amplified by the power amplifier, so that the signal transmission quality and efficiency of the symbol power tracking amplification system can be improved. The symbol power tracking power supply dynamically adjusts the voltage level of the power supply voltage provided to the power amplifier by tracking the radio frequency input signal, so that the power supply voltage provided to the power amplifier by the symbol power tracking power supply matches the envelope of the radio frequency input signal during the working process of the power amplifier. The power amplifier efficiency is improved, and the working performance and service life of the symbol power tracking amplification system are improved.

[0028] In one implementation, each switch unit comprises one field effect transistor. One field effect transistor is coupled between one switching capacitor and the power amplifier. In a symbol period time slot of one signal period, one field effect transistor works in a variable resistance region.

[0029] In one implementation, each switch unit comprises two field effect transistors. The two field effect transistors are connected in parallel. In a cyclic prefix time slot of one signal period, one field effect transistor works in a constant current region, and the other field effect transistor is turned off. In a symbol period time slot of one signal period, one field effect transistor works in a constant current region or is turned off, and the other field effect transistor works in a variable resistance region.

[0030] In a third aspect, the present application provides a symbol voltage regulation method, comprising:

[0031] Each switching capacitor is pre-charged to a different voltage level by the power supply topology;

[0032] At the beginning of the cyclic prefix time slot of a signal cycle, one of the switching capacitors is connected to the load by the field effect transistor of the switching unit;

[0033] During the cyclic prefix time slot of a signal cycle, the field effect transistor is controlled to operate in the constant current region, and the supply voltage of the load is adjusted to the first voltage value by one of the switching capacitors.

[0034] The symbol voltage regulation method can pre-charge each switching capacitor to a preset voltage level during power-on by the power supply topology, and keep each switching capacitor at a preset voltage level, so that each switching capacitor can store different electrical energy to provide different supply voltages for the load according to the different supply voltages required by the load in different signal cycles. One of the switching capacitors is used to supply power to the load, and during the cyclic prefix time slot of a signal cycle, the switching capacitor is used to charge or discharge the load to adjust the voltage level of the supply voltage provided by the power supply topology to the load to the voltage level required by the load, i.e., the first voltage value required by the load in a signal cycle. At the same time, since the field effect transistor in the switching unit operates in the constant current region, the coupling of one of the switching capacitors to the load can also limit the charging current of the switching capacitor, thereby limiting the current peak value during hard charging of the capacitor and suppressing overshoot oscillation. That is, the symbol voltage regulation method can limit the transient current during hard charging of the capacitor without sacrificing the steady-state efficiency of the circuit, while suppressing the up-down surge of the voltage between the switching capacitor and the load in the final state of voltage regulation, further improving the reliability of the symbol voltage regulation method.

[0035] In one implementation, at the beginning of the cyclic prefix time slot of a signal cycle, the coupling of one of the switching capacitors to the load by the switching unit further comprises:

[0036] The supply voltage required by the load in a signal cycle is determined to be the first voltage value.

[0037] In one implementation, the coupling of one of the switching capacitors to the load by the field effect transistor of the switching unit comprises:

[0038] At the beginning of the cyclic prefix time slot of a signal cycle, the coupling of one of the switching capacitors to the load by the field effect transistor of the switching unit, wherein the voltage level of one of the switching capacitors is greater than the voltage level of the first voltage value.

[0039] In the present embodiment, by selecting one of the voltage levels greater than the first voltage value to switch the capacitance to supply power to the load, it can be ensured that the one of the switched capacitances meets the power supply requirements of the load, thereby improving the power supply reliability of the sign power tracking power supply.

[0040] In an embodiment, the voltage level of one of the plurality of switched capacitances is greater than the first voltage value, and a difference between the voltage level of the one of the plurality of switched capacitances and the voltage level of the first voltage value is less than a difference between the voltage level of any one of the plurality of switched capacitances and the voltage level of the first voltage value.

[0041] In the present embodiment, by selecting one of the voltage levels greater than the first voltage value to switch the capacitance to supply power to the load, it can be ensured that the one of the switched capacitances meets the power supply requirements of the load, thereby improving the power supply reliability of the sign power tracking power supply.

[0042] In an embodiment, after the supply voltage of the load is adjusted to the first voltage value by one of the switched capacitances, the method further comprises:

[0043] In a sign period time slot of a signal period, the field effect transistor is controlled to operate in a variable resistance region, wherein the field effect transistor is a linear field effect transistor.

[0044] In the present embodiment, the linear field effect transistor has a wide linear region, and by setting the linear field effect transistor as a main power switch between the switched capacitance and the load, the current peak value of the hard charging of the switched capacitance can be limited, and the current limiting accuracy of the field effect transistor can be improved, thereby avoiding the situation that the device parameter error or the temperature influence on the device may affect the current limiting effect. That is, by setting the switching device between the switched capacitance and the load as a linear field effect transistor, the current limiting accuracy can be improved, the overshoot oscillation can be further suppressed, and the working reliability of the sign power tracking power supply can be improved. By setting the switching device between the switched capacitance and the load as a linear field effect transistor, compared with the closed loop scheme, the voltage or current detection circuit with high accuracy and bandwidth requirement can be omitted. At the same time, the linear field effect transistor also has the characteristics of low resistance conduction, and the supply voltage provided to the load needs to be maintained stable in the sign period time slot. Therefore, by setting the switching device as a linear field effect transistor, low resistance conduction between the switched capacitance and the load can be realized in the sign period time slot, and the steady state efficiency can be improved.

[0045] In an embodiment, the field effect transistor is controlled to operate in a constant current region, and the supply voltage of the load is adjusted to the first voltage value by one of the switched capacitances, and the method comprises:

[0046] In a cyclic prefix time slot of a signal period, the control controls the field effect tube to work in the constant current area, controls another field effect tube to be off, and adjusts the power supply voltage of the load to the first voltage value through the switching capacitor, wherein the number of field effect tubes is two, and the two field effect tubes are connected in parallel.

[0047] In the implementation mode, each switching unit includes two field effect tubes connected in parallel between a switching capacitor and a load, thereby forming two conducting branches between the switching capacitor and the load. By forming two conducting branches between the switching capacitor and the load, the conducting and off of the two conducting branches are controlled respectively in the cyclic prefix time slot and the symbol period time slot, so that different conducting effects are formed between the switching capacitor and the load. By controlling the conducting and off of the two conducting branches respectively through the two field effect tubes in different time slots of a signal period, the conducting efficiency or off efficiency of each field effect tube is improved, thereby improving the overall working performance of the symbol voltage regulation method.

[0048] In one implementation mode, after adjusting the power supply voltage of the load to the first voltage value through the switching capacitor, the method further comprises:

[0049] In a symbol period time slot of a signal period, the control controls another field effect tube to work in the variable resistance area. BRIEF DESCRIPTION OF DRAWINGS

[0050] In order to more clearly illustrate the technical solutions of the present application, the following will briefly introduce the drawings needed in the embodiments. Obviously, the drawings described below are only some embodiments of the present application, and other drawings can also be obtained by those skilled in the art without creative labor.

[0051] Fig. 1 is a schematic diagram of the plane structure of the existing symbol power tracking amplification system;

[0052] Fig. 2 is a schematic diagram of the working principle of the existing symbol power tracking power supply symbol voltage regulation;

[0053] Fig. 3 is a schematic diagram of the working scene of the symbol power tracking amplification system provided by the embodiment of the present application;

[0054] Fig. 4 is a schematic diagram of the plane structure of the electronic device provided by the embodiment of the present application;

[0055] Fig. 5 is a schematic diagram of the plane structure of the symbol power tracking power supply of the symbol power tracking amplification system provided by the embodiment of the present application;

[0056] Fig. 6 is a schematic diagram of the plane structure of the symbol power tracking power supply after the hidden part structure is removed according to the embodiment of the present application;

[0057] Fig. 7 is a planar structure diagram of the symbol power tracking power supply after removing part of the structure according to an embodiment of the present application;

[0058] Fig. 8 is a circuit structure diagram of the symbol power tracking power supply according to an embodiment of the present application;

[0059] Fig. 9 is a planar structure diagram of the symbol power tracking power supply after removing part of the structure according to an embodiment of the present application;

[0060] Fig. 10 is a circuit structure diagram of the symbol power tracking power supply according to an embodiment of the present application;

[0061] Fig. 11 is a working timing diagram of the symbol power tracking power supply according to an embodiment of the present application;

[0062] Fig. 12 is a working flow diagram of a symbol voltage regulating method according to an embodiment of the present application;

[0063] Fig. 13 is a timing diagram of the driving voltage and driving signal of the field effect transistor in the symbol voltage regulating method according to an embodiment of the present application;

[0064] Fig. 14 is a timing diagram of the driving voltage and driving signal of the field effect transistor in the symbol voltage regulating method according to an embodiment of the present application;

[0065] Fig. 15 is a timing diagram of the power supply voltage provided to the load in the symbol voltage regulating method according to an embodiment of the present application. DETAILED DESCRIPTION

[0066] The technical solutions in the embodiments of the present application will be described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative work fall within the scope of the present application.

[0067] The application provides a symbol power tracking power supply for adjusting the power supply voltage of a load, comprising a power supply topology, a plurality of switching capacitors and a plurality of switching units, each switching capacitor is coupled between the power supply topology and the load, each switching unit is coupled between one switching capacitor and the load, the voltage levels of each switching capacitor are different, the power supply topology is used for supplying power for the load by one switching capacitor in the plurality of switching capacitors in one signal period, each switching unit comprises at least one field effect tube, and the at least one field effect tube is used for turning on one switching capacitor and the load, wherein the at least one field effect tube works in a constant current region in a cyclic prefix time slot of one signal period. The symbol power tracking power supply of the application limits the transient current of hard charging of the capacitor without sacrificing the steady-state efficiency of the circuit, simultaneously suppresses the up and down of the voltage of the output bus between the voltage regulation steady-state switching capacitor and the load, and further improves the working reliability of the symbol power tracking power supply.

[0068] The application also provides a symbol power tracking amplification system, comprising a radio frequency circuit, a power amplifier and a symbol power tracking power supply, the radio frequency circuit is used for generating a radio frequency input signal, the power amplifier is used for amplifying the radio frequency input signal generated by the radio frequency circuit, and the symbol power tracking power supply comprises a power supply topology, a plurality of switching capacitors and a plurality of switching units, each switching capacitor is coupled between the power supply topology and the power amplifier, each switching unit is coupled between one switching capacitor and the power amplifier, the voltage levels of each switching capacitor are different, the power supply topology tracks the radio frequency input signal generated by the radio frequency circuit, and supplies the power supply voltage for the power amplifier by one switching capacitor in the plurality of switching capacitors in one signal period of the radio frequency input signal generated by the radio frequency circuit, wherein the voltage level of one switching capacitor matches the envelope of the radio frequency input signal generated by the radio frequency circuit, each switching unit comprises at least one field effect tube, and the at least one field effect tube is used for turning on one switching capacitor and the power amplifier, and the at least one field effect tube works in a constant current region in a cyclic prefix time slot of one signal period.

[0069] The application also provides another symbol voltage regulation method, comprising:

[0070] Each switching capacitor is pre-charged to different voltage levels by the power supply topology;

[0071] At the moment when the cyclic prefix time slot of one signal period starts, one switching capacitor in the plurality of switching capacitors is turned on and the load by the field effect tube of the switching unit;

[0072] The control field effect transistor operates in the constant current region, and adjusts the supply voltage of the load to the first voltage value through one of the switching capacitors. The sign voltage regulation method can limit the transient current when the switching capacitor is coupled with the load, and improve the voltage regulation reliability and efficiency of the sign voltage regulation method.

[0073] Referring to FIG. 3 and FIG. 4, FIG. 3 is a working scenario diagram of the sign power tracking amplification system 1000 provided by the embodiments of the present application, and FIG. 4 is a planar structure diagram of the electronic device 100 provided by the embodiments of the present application. The sign power tracking amplification system 1000 provided by the embodiments of the present application can be applied to, but is not limited to, mobile phones, tablet computers, personal computers (PCs), personal digital assistants (PDAs), smart watches, wearable electronic devices, augmented reality (AR) devices, virtual reality (VR) devices, vehicle-mounted devices, smart cars, smart speakers, robots, smart glasses, and the like, to realize the communication function of the electronic device.

[0074] In the embodiments shown in FIG. 3 and FIG. 4, the electronic device is exemplarily introduced as a mobile phone by the embodiments of the present application, and the electronic device 100 is exemplarily introduced as a mobile phone.

[0075] It should be noted that, in the embodiments shown in FIG. 3 and FIG. 4, only one possible structure shape, size, and the like of the electronic device 100 is exemplarily introduced, but the structure shape, size, and the like of the electronic device 100 provided by the embodiments of the present application are not limited to this. In the remaining embodiments provided by the present application, the structure shape, size, and the like of the electronic device 100 can be adjusted according to actual design requirements, and the embodiments of the present application do not make specific limitations on this.

[0076] In the embodiments shown in FIG. 3 and FIG. 4, the electronic device 100 includes a housing 101 for accommodating and fixing one or more functional structural devices for realizing the communication function in the sign power tracking amplification system 1000. It can be understood that the housing 101 can form protection and fixation for each functional structural device of the sign power tracking amplification system 1000, so as to improve the working performance and service life of the sign power tracking amplification system 1000.

[0077] That is, the shell 101 has a protective effect on the functional structural devices of the symbol power tracking amplification system 1000 housed in the shell 101, which can prevent external dust, water vapor and impurities from eroding the functional structural devices of the symbol power tracking amplification system 1000. At the same time, the shell 101 can form a supporting and fixing effect on the functional structural devices in the symbol power tracking amplification system 1000 to meet the stable working needs of each functional structural device of the symbol power tracking amplification system 1000.

[0078] For example, the electronic device 100 includes a printed circuit board (PCB) 102 housed in the shell 101. The printed circuit board 102 is used to integrate a plurality of functional circuits and a plurality of functional electronic components in the symbol power tracking amplification system 1000 to ensure the working performance of the symbol power tracking amplification system 1000 and reduce the overall volume of the electronic device 100. Among them, the printed circuit board 102 can but not limited to integrate at least one of a control circuit, a symbol power tracking power supply and a power amplifier.

[0079] For example, the number of power amplifiers is at least one, and the at least one power amplifier is used to amplify the transmission signals of different frequency bands or different bandwidth ranges transmitted by the electronic device 100.

[0080] For example, the symbol power tracking power supply is used to provide a power supply voltage for the load. Among them, the number of symbol power tracking power supplies can be the same as the number of power amplifiers, one symbol power tracking power supply corresponds to one power amplifier, and each symbol power tracking power supply is used to power the corresponding power amplifier.

[0081] It should be noted that in the embodiment shown in FIG. 3 of the present application, only one possible embodiment of the types, numbers, arrangement positions, etc. of the functional circuits and functional devices arranged on the printed circuit board 102 provided in the electronic device 100 is exemplarily introduced, but the types, numbers, arrangement positions, etc. of the functional circuits and functional devices integrated on the printed circuit board 102 provided in the embodiments of the present application are not limited to this. In other embodiments of the present application, the types, numbers, arrangement positions, etc. of the functional circuits and functional devices integrated on the printed circuit board 102 can be adjusted according to the actual functional design and application scenario of the electronic device 100, and the embodiments of the present application do not make specific limitations.

[0082] For example, the printed circuit board 102 can but not limited to arrange filters, low-noise amplifiers, audio codecs, internal memories, sensors, inductors, capacitors and other functional devices.

[0083] For example, the symbol power tracking amplification system 1000 can include the symbol power tracking power supply 10, the control circuit 103, the power amplifier 104, the radio frequency circuit 105, and the antenna 106, at least one of which is integrated on the printed circuit board 102.

[0084] In the embodiment, the symbol power tracking power supply 10 is used as a power supply to provide a supply voltage for a load. The symbol power tracking power supply 10 can be applied to the symbol power tracking amplification system 1000 shown in FIG. 3 as a power supply to drive the power amplifier 104 to amplify a signal. However, in other embodiments, the symbol power tracking power supply 10 can also be used to supply power to other types of loads, such as, but not limited to, a battery, a super capacitor, and a power supply hard parallel scenario.

[0085] In the present specification, the load is exemplarily taken as the power amplifier 104.

[0086] As shown in FIGS. 3 and 4, the control circuit 103 is configured to receive and respond to an external signal. The control circuit 103 is coupled to at least one of the radio frequency circuit 105 and the symbol power tracking power supply 10, so as to provide one or more control signals to the radio frequency circuit 105 and the symbol power tracking power supply 10, respectively, to enable the radio frequency circuit 105 and the symbol power tracking power supply 10 to work cooperatively.

[0087] Specifically, the control circuit 103 can generate one or more digital signals or one or more analog signals based on the received external signal, but is not limited thereto. For example, the control circuit 103 can generate a digital data signal and a digital symbol tracking signal based on the received external data signal, and can process the digital data signal and the digital symbol tracking signal to provide the processed digital data signal and the digital symbol tracking signal to the radio frequency circuit 105 and the symbol power tracking power supply 10, respectively. The data symbol tracking signal corresponds to the digital data signal, and the control circuit 103 can generate the corresponding digital symbol tracking signal based on the amplitude or amplitude component of the digital data signal, but is not limited thereto.

[0088] In the embodiment shown in FIG. 3, the control circuit 103 can perform digital-to-analog conversion (DAC) processing on the digital data signal and the digital symbol tracking signal, to generate a data signal TX corresponding to the digital data signal and a symbol tracking signal TS corresponding to the digital symbol tracking signal. SPTand the symbol power tracking signal TS are provided to the radio frequency circuit 105 and the symbol power tracking power supply 10 respectively. That is, the control circuit 103 provides the generated data signal TX to the radio frequency circuit 105 and the symbol power tracking signal TS to the symbol power tracking power supply 10 respectively. SPT to the symbol power tracking power supply 10.

[0089] It should be noted that in the embodiments shown in FIG. 3 and FIG. 4 of the present application, the control circuit 103 only provides the data signal TX to the radio frequency circuit 105 and the symbol power tracking signal TS to the symbol power tracking power supply 10 respectively. SPT The above is only an exemplary introduction, but does not limit the control circuit 103 provided in the embodiments of the present application to only provide the data signal TX to the radio frequency circuit 105 and the symbol power tracking signal TS to the symbol power tracking power supply 10. SPT In the remaining embodiments provided in the present application, the control circuit 103 can also be used to generate other functional digital or analog signals, and can be provided to different functional circuits or different functional components respectively. That is, the control signals provided by the control circuit 103 provided in the embodiments of the present application can be adjusted according to the actual functional requirements and application scenarios of the symbol power tracking amplification system 1000, and the embodiments of the present application do not make specific limitations.

[0090] The radio frequency circuit 105 is coupled between the control circuit 103 and the power amplifier 104, and the radio frequency circuit 105 is used to generate a radio frequency input signal RF IN based on the control signal provided by the control circuit 103. IN The radio frequency circuit 105 is coupled between the control circuit 103 and the power amplifier 104, and the radio frequency circuit 105 is used to generate a radio frequency input signal RF IN based on the control signal provided by the control circuit 103.

[0091] The power amplifier 104 is coupled between the radio frequency circuit 105 and the antenna 106, and the power amplifier 104 is used to amplify the communication signal transmitted by the symbol power tracking amplification system 1000. Specifically, the power amplifier 104 amplifies the radio frequency input signal RF IN generated by the radio frequency circuit 105 and outputs a radio frequency output signal RF OUT . For example, the power amplifier 104 can provide the radio frequency output signal RF OUT to the antenna 106, and the antenna 106 transmits it.

[0092] The symbol power tracking power supply 10 of the present application optimizes the internal circuit structure to amplify the radio frequency input signal RF INThe symbol power tracking power supply 10 is configured to limit the current in the time slot of the cyclic prefix CP of one signal period and realize the effect of low-resistance conduction in the symbol period time slot, thereby being able to limit the transient current of the symbol power tracking power supply 10 at the beginning of the time slot of the cyclic prefix CP, while being able to improve the steady-state efficiency of the circuit of the symbol power tracking power supply 10 in the symbol period time slot.

[0093] Next, the technical scheme of the present application will be further described in the present application with reference to the following drawings and embodiments.

[0094] Please refer to FIG. 5 and FIG. 6, FIG. 5 is a plan structure schematic diagram of the symbol power tracking power supply 10 of the symbol power tracking amplification system 1000 provided by the embodiment of the present application, and FIG. 6 is a plan structure schematic diagram of the symbol power tracking power supply 10 after hiding part of the structure provided by the embodiment of the present application. In order to clearly show the arrangement structure of the plurality of switch units 13 in the symbol power tracking power supply 10 provided by the embodiment of the present application, the symbol power tracking control circuit 11 and the rest possible functional circuits or functional components in the symbol power tracking power supply 10 are hidden in the embodiment shown in FIG. 6.

[0095] The symbol power tracking power supply 10 is configured to track the radio frequency input signal RF IN generated by the radio frequency circuit 105 and provide the power supply voltage for the power amplifier 104. The symbol power tracking power supply 10 comprises the symbol power tracking control circuit 11, the power supply topology 12, the plurality of switch units 13 and the plurality of switched capacitors 14. The symbol power tracking control circuit 11 is configured to provide one or more control signals to the power supply topology 12 and the switch units 13 respectively based on the symbol tracking signal TS SPT and other control signals provided by the control circuit 103, so that the power supply topology 12 and the switch units 13 work cooperatively to realize the function of dynamically adjusting the voltage level of the power supply voltage V PA .

[0096] For example, the symbol power tracking control circuit 11 provides the first control signal SPT CS 1 to the power supply topology 12, and the first control signal SPT CS 1 is configured to control the power supply topology 12 to provide the output voltage V OUT . For example, the symbol power tracking control circuit 11 provides the second control signal SPT CS 2 to the switch units 13, and the second control signal SPT CS 2 is configured to control the switch units 13 to select one of the plurality of switched capacitors 14 to provide the power supply voltage V PA for the power amplifier 104.

[0097] Power supply topology 12 serves as a power source to provide electrical energy. It is coupled to power amplifier 104 via an output bus (BUS) to supply power to power amplifier 104 and ensure its normal operation. Power supply topology 12 supplies power to power amplifier 104 through a switching capacitor 14.

[0098] For example, each switching capacitor 14 is coupled between the power supply topology 12 and the power amplifier 104, and multiple switching capacitors 14 are connected in parallel. The power supply topology 12 is used for the RF input signal RF generated by the RF circuit 105. IN During one signal cycle T, the power amplifier 104 is powered through one of the multiple switching capacitors 14.

[0099] In the embodiments shown in Figures 5 and 6, the power supply topology 12 may, but is not limited to, including a DC-DC power supply (Direct Current-Direct Current, DC-DC) 121 and a DC-DC converter 122. The DC-DC power supply 121 is used to accept an input voltage V. IN And used to generate intermediate voltage V MID , to provide to DC-DC converter 122.

[0100] For example, the input voltage V IN It is possible, but not currently set to -48V, DC-DC power supply 121 will input voltage V IN Convert and generate intermediate voltage V MID Intermediate voltage V MID The voltage is +48V. The DC-DC power supply 121 may, but is not limited to, providing current isolation. Furthermore, the DC-DC power supply 121 may, but is not limited to, having a ground reference pin (GND).

[0101] DC-DC converter 122 accepts intermediate voltage V MID As voltage input, it generates output voltage V. OUT DC-DC converter 122 is used to convert the output voltage V OUT This is supplied to each switched capacitor 14. That is, the DC-DC converter 122 converts the intermediate voltage V... MID Converted to output voltage V OUT And used to convert each output voltage V OUT Each is supplied to each switching capacitor 14.

[0102] Understandably, multiple switching capacitors 14 are coupled to power supply topology 12, which is able to provide output voltage V during power-up. OUT Each switching capacitor 14 is pre-charged to a preset voltage level V. CPAand keep each switched capacitor 14 maintained at a preset voltage level V CPA unchanged.

[0103] For example, the power supply topology 12 provides a voltage level V C may be different. Wherein the voltage level V C of each switched capacitor 14 can be but not limited to be set in advance according to the modulation requirement of the supply voltage V PA of the power amplifier 104 by the sign power tracking power supply 10.

[0104] In the embodiment shown in FIG. 6, the plurality of switched capacitors 14 includes a first switched capacitor 14a, a second switched capacitor 14b and a third switched capacitor 14c. The power supply topology 12 charges the first switched capacitor 14a to a first voltage level V OUT 1, the second switched capacitor 14b to a second voltage level V C 2 and the third switched capacitor 14c to a third voltage level V C 3, respectively. C

[0105] Wherein the first voltage level V C 1, the second voltage level V C 2 and the third voltage level V C 3 can be different, i.e. the voltage level of each switched capacitor 14 can be different. And the difference of the voltage level between any two adjacent switched capacitors 14 can also be adjusted according to actual design requirements.

[0106] In a possible embodiment, for example but not limited to, the first voltage level V C 1 can be 32V, the second voltage level V C 2 can be 40V and the third voltage level V C 3 can be 24V.

[0107] Each switched capacitor 14 is coupled to the output bus BUS through a switching unit 13. The plurality of switching units 13 corresponds to the plurality of switched capacitors 14 one by one, i.e. each switching unit 13 is coupled between a switched capacitor 14 and the power amplifier 104. Each switching unit 13 is used to control the conduction or turn-off between a switched capacitor 14 and the output bus BUS, i.e. the switching unit 13 is used to couple the switched capacitor 14 to the output bus BUS or to turn off the switched capacitor 14 from the output bus BUS.

[0108] ​As shown in FIG. 6, the plurality of switch units 13 includes a first switch unit 13a, a second switch unit 13b and a third switch unit 13c. Among them, the first switch unit 13a is coupled to the output bus BUS through the first switch unit 13a, the second switch unit 13b is coupled to the output bus BUS through the second switch unit 13b, and the third switch unit 13c is coupled to the output bus BUS through the third switch unit 13c.

[0109] It can be understood that each switch unit 13 acts as a switch between the corresponding switching capacitor 14 and the power amplifier 104, and by controlling the conduction or non-conduction of the switch unit 13, the power supply of one of the switching capacitors 14 to the power amplifier 104 can be controlled. Since the voltage level V C of each switching capacitor 14 is different, the supply voltage V PA provided by each switching capacitor 14 to the power amplifier 104 is different, thereby achieving the effect of adjusting the supply voltage V PA provided by the symbol power tracking power supply 10 to the power amplifier 104.

[0110] For example, when one of the plurality of switch units 13 is turned on to couple one of the switching capacitors 14 and the power amplifier 104, the remaining switch units 13 in the plurality of switch units 13 are turned off to couple the corresponding switching capacitors 14 and the power amplifier 104.

[0111] As shown in FIG. 6, when the required supply voltage V PA of the power amplifier 104 in a time slot of a certain symbol period Symbol is the first voltage value V PA 1, one of the switching capacitors 14 is selected to supply power to the power amplifier 104. Among them, the voltage level of one of the switching capacitors 14 can be greater than the voltage level of the first voltage value V PA 1.

[0112] In the embodiment shown in FIG. 6, the voltage levels of the first switching capacitor 14a, the second switching capacitor 14b and the third switching capacitor 14c are greater than the voltage level of the first voltage value V PA 1, and the difference between the first voltage level V C 1 of the first switching capacitor 14a and the voltage level of the first voltage value V PA 1 is less than the difference between the second voltage level V C 2 of the second switching capacitor 14b and the voltage level of the first voltage value V PA 1, and less than the difference between the third voltage level V C 3 of the third switching capacitor 14c and the voltage level of the first voltage value V PA 1.

[0113] Therefore, the first switching unit 13a can couple the first switched capacitor 14a to the output bus BUS to enable the coupling between the first switched capacitor 14a and the power amplifier 104, so that the first switched capacitor 14a can supply power to the power amplifier 104 and be used to adjust the supply voltage V PA to the first voltage value V PA 1.

[0114] At the same time, the remaining switching units 13 in the plurality of switching units 13 are turned off to couple the switched capacitors 14 corresponding thereto and the output bus BUS, so that the symbol power tracking power supply 10 provides the supply voltage V PA to the power amplifier 104 in a time slot of a certain symbol period Symbol. That is, the second switching unit 13b is turned off to couple the second switched capacitor 14b and the output bus BUS, and the third switching unit 13c is turned off to couple the third switched capacitor 14c and the output bus BUS.

[0115] It can be understood that when the power supply topology 12 supplies power to the power amplifier 104 through one of the switched capacitors 14, the remaining switching units 13 are turned off to couple the remaining switched capacitors 14 and the power amplifier 104, so that the symbol power tracking power supply 10 provides the supply voltage V PA to the power amplifier 104, the voltage level of which is equal to the voltage level V C of one of the switched capacitors 14, thereby ensuring the precision of the voltage regulation of the symbol power tracking power supply 10. At the same time, one switching unit 13 corresponds to one switched capacitor 14, and the on or off of the coupling between one switched capacitor 14 and the load is controlled by each switching unit 13, respectively, to achieve precise voltage regulation of the symbol power tracking power supply 10 and improve the working performance and service life of the internal functional devices of the symbol power tracking power supply 10.

[0116] It should be noted that in the embodiment shown in FIG. 6 of the present application, only three switched capacitors 14 and three switching units 13 corresponding thereto are exemplarily introduced, but the number of the switched capacitors 14 and the number of the switching units 13 in the symbol power tracking power supply 10 provided by the embodiments of the present application are not limited to this. In the remaining embodiments of the present application, the number of the switched capacitors 14 and the number of the switching units 13 arranged in the switched capacitors 14 can be adjusted according to the modulation requirements of the supply voltage V PA of the symbol power tracking power supply 10 or the actual application scenarios of the symbol power tracking power supply 10, and the embodiments of the present application do not make specific limitations thereon. The number of the switched capacitors 14 and the number of the switching units 13 are equal, and the plurality of switched capacitors 14 and the plurality of switching units 13 correspond one by one.

[0117] Please refer to FIG. 7, which is a planar structural schematic diagram of the symbol power tracking power supply 10 after the hidden part of the structure in the embodiment provided by the present application. In order to clearly show the arrangement structure of the internal functional circuit or functional device of each switching unit 13 in the symbol power tracking power supply 10 provided by the present application, the DC-DC power supply 121, the DC-DC converter 122 and the rest of the possible functional circuit or functional device in the symbol power tracking power supply 10 are hidden in the embodiment shown in FIG. 7.

[0118] As shown in FIG. 7, each switching unit 13 includes at least one field effect tube 131, which is used to turn on the coupling between one of the switching capacitors 14 and the power amplifier 104. Among them, the at least one field effect tube 131 works in the constant current area within the time slot of the cyclic prefix CP of one signal period T. For example, in the embodiment shown in FIG. 7, each switching unit 13 includes one field effect tube 131. That is, the number of at least one field effect tube 131 is one.

[0119] When the symbol power tracking power supply 10 of the present application supplies power to the load through one of the switching capacitors 14, the switching capacitor 14 is used to charge or discharge the load within the time slot of the cyclic prefix CP of one signal period T, so that the supply voltage V PA provided by the power supply topology 12 to the load is adjusted to the required supply voltage V PA of the load.

[0120] It can be understood that by controlling the field effect tube 131 in the switching unit 13 of the symbol power tracking power supply 10 of the present application to work in the constant current area within the time slot of the cyclic prefix CP of one signal period T, the switching capacitor 14 can be coupled to the load while forming a current limiting effect on the charging current of the switching capacitor 14, thereby being able to limit the current peak value when the switching capacitor 14 is hard charged and suppress the overshoot oscillation, that is, being able to limit the transient current when the switching capacitor is turned on with the output bus, and thereby being able to prevent the occurrence of high-frequency resonance and other adverse phenomena inside the symbol power tracking power supply, so as to improve the working performance and service life of the internal functional structure device of the symbol power tracking power supply 10. At the same time, by controlling the field effect tube 131 in the switching unit 13 to work in the variable resistance area within the time slot of the symbol period Symbol of one signal period T, the low-resistance turn-on effect between the switching capacitor 14 and the output bus Bus can be achieved, so as to improve the steady-state efficiency.

[0121] In other words, the sign power tracking power supply 10 can take into account the current limiting effect and improve the steady-state efficiency of the circuit by controlling the field effect tube 131 to work in different operating characteristic intervals, that is, without sacrificing the steady-state efficiency of the circuit, the transient current of the hard charging of the capacitor is limited, and the voltage of the output bus between the voltage regulation steady-state switching capacitor 14 and the load is suppressed, further improving the working reliability of the sign power tracking power supply 10. In addition, the internal structure of the sign power tracking power supply of the present application is simple.

[0122] The sign power tracking amplification system 1000 of the present application adopts the sign power tracking power supply 10 provided by any of the implementation manners described above, so the sign power tracking amplification system 1000 of the present application provides all the possible beneficial effects of the sign power tracking power supply 10 provided by any of the implementation manners described above.

[0123] For example, the at least one field effect tube 131 is a linear field effect tube.

[0124] It can be understood that the at least one linear field effect tube has the characteristic of a wide linear region, and by setting the linear field effect tube as the main power switch between the switching capacitor 14 and the load, the current peak value of the hard charging of the switching capacitor 14 can be limited, and the current limiting accuracy of the field effect tube 131 can be improved, avoiding the case that the device parameter error or the temperature influence on the device may affect the current limiting effect.

[0125] That is, by setting the switching device between the switching capacitor 14 and the load as a linear field effect tube, the current limiting accuracy can be improved, the overshoot oscillation can be further suppressed, and the working reliability of the sign power tracking power supply 10 can be improved. At the same time, by setting the switching device between the switching capacitor 14 and the load as a linear field effect tube, compared with the closed-loop scheme, the voltage or current detection circuit with high accuracy and bandwidth requirements can be omitted, thereby the internal structure design of the sign power tracking power supply 10 can be simplified and the internal structure complexity can be reduced.

[0126] For example, the number of field effect tubes 131 of each switching unit 13 is one, and one field effect tube 131 is coupled between one switching capacitor 14 and the power amplifier 104. Among them, in the symbol period Symbol of one signal period T, one field effect tube 131 works in the variable resistance region.

[0127] It can be understood that when only one field effect tube 131 is used as a switching device between one switching capacitor 14 and the power amplifier 104, the number of internal functional devices of the sign power tracking power supply 10 can be reduced, and the preparation cost of the sign power tracking power supply 10 can be reduced.

[0128] Meanwhile, the field effect transistor 131 works in the constant current region in the time slot of the cyclic prefix CP, so that the switching capacitor 14 provides the supply voltage V PA of the power amplifier 104 to the voltage level required by the power amplifier 104. The field effect transistor 131 works in the time slot of the symbol period CP, and when the field effect transistor 131 works in the variable resistance region, the switching capacitor 14 provides the supply voltage V PA of the power amplifier 104 to the voltage level required by the power amplifier 104.

[0129] Since the field effect transistor 131 works in the variable resistance region, the field effect transistor 131 has the characteristics of low resistance conduction. Therefore, the field effect transistor 131 can conduct the switching capacitor 14 to the power amplifier 104 with low resistance, and by reducing the conduction resistance between the switching capacitor 14 and the power amplifier 104, the steady-state circuit efficiency can be improved.

[0130] It should be noted that in the embodiment shown in FIG. 7, only any two adjacent switching units 13 of the symbol power tracking power supply 10 are exemplarily introduced, and only one possible arrangement position and connection relationship of the field effect transistor 131, the driving module 132 and the auxiliary source circuit 133 in each switching unit 13 are exemplarily introduced, but the actual arrangement number of the switching unit 13 provided by the embodiment of the present application, and the actual arrangement position relationship and actual connection relationship of the field effect transistor 131, the driving module 132 and the auxiliary source circuit 133 in each switching unit 13 are not limited to this. In the remaining embodiments of the present application, the arrangement number of the switching unit 13 of the symbol power tracking power supply 10 and the position and connection relationship between the internal functional circuits can be adjusted according to the actual functional requirements, structural design and application scenarios of the symbol power tracking power supply 10, and the embodiment of the present application does not make specific limitations.

[0131] Please refer to FIG. 8 in combination with FIG. 7, FIG. 8 is a circuit structure schematic diagram of the symbol power tracking power supply 10 provided by the embodiment of the present application. As shown in FIG. 7 and FIG. 8, each switching unit 13 further includes a driving module 132 and an auxiliary source circuit 133, and the driving module 132 is coupled between the field effect transistor 131 and the auxiliary source circuit 133. Among them, the auxiliary source circuit 133 is used to supply power for the driving module 132, and the driving module 132 is used to provide a driving signal to the field effect transistor 131 to drive the field effect transistor 131 to work in different working characteristic intervals.

[0132] The driving voltage of the auxiliary source circuit 133 includes a first driving voltage V1 and a second driving voltage V2, and the first driving voltage V1 is used to drive a field effect transistor 131 to work in the constant current region, and the second driving voltage V2 is used to drive the field effect transistor 131 to work in the variable resistance region.

[0133] For example, the voltage level of the first driving voltage V1 is lower than the voltage level of the second driving voltage V2. It can be understood that the voltage level of the first driving voltage V1 is lower than the voltage level of the second driving voltage V2. Therefore, the first driving voltage V1 is relatively low, which can drive the field effect transistor 131 to work in the constant current region, so that the field effect transistor 131 can form a current limiting effect. The second driving voltage V2 is relatively high, which can drive the field effect transistor 131 to work in the variable resistance region, so that the field effect transistor 131 can form a low resistance conduction effect.

[0134] For example, the driving module 132 can be coupled with the symbol power tracking control circuit 11, and the symbol power tracking control circuit 11 can control the driving module 132 to provide driving signals with different voltage levels to the field effect transistor 131 under the driving of the driving voltage. Specifically, the symbol power tracking control circuit 11 can generate a control signal through a PWM controller and provide the control signal to the driving chip 1321.

[0135] For example, the driving module 132 includes a driving chip 1321 for providing a driving signal to the field effect transistor 131. Specifically, one driving chip 1321 corresponds to one field effect transistor 131. When the auxiliary source circuit 133 provides the first driving voltage V1 to the field effect transistor 131 through the driving chip 1321, the driving chip 1321 can drive the field effect transistor 131 to work in the constant current region based on the received control signal, so that the field effect transistor 131 can limit the switching current of the switching capacitor 14 switched to the output bus BUS. When the auxiliary source circuit 133 provides the second driving voltage V2 to the field effect transistor 131 through the driving chip 1321, the driving chip 1321 can drive the field effect transistor 131 to work in the variable resistance region based on the second driving voltage V2 and the received control signal, so that the field effect transistor 131 is completely turned on.

[0136] It can be understood that the auxiliary source circuit 133 drives the field effect transistor 131 through the driving chip 1321, and the auxiliary source circuit 133 provides driving voltages with different voltage levels to the driving chip 1321, so that the driving chip 1321 can provide driving signals with different voltage levels to the field effect transistor 131, thereby making the field effect transistor 131 work in different characteristic regions and achieving different conduction effects.

[0137] For example, the auxiliary source circuit 133 includes two power supply branches 1332 connected in parallel. One power supply branch 1332 is used to provide the first driving voltage V1, and the other power supply branch 1332 is used to provide the second driving voltage V2.

[0138] In a time slot of the cyclic prefix CP of a signal period T, the first power supply branch 1332a is turned on, and the second power supply branch 1332b is turned off. In a time slot of the symbol period Symbol of a signal period T, the first power supply branch 1332a is turned off, and the second power supply branch 1332b is turned on. In the embodiment shown in FIG. 8, one of the power supply branches 1332 is taken as the first power supply branch 1332a, and the other one of the power supply branches 1332 is taken as the second power supply branch 1332b.

[0139] It can be understood that the two power supply branches 1332 are alternately turned on and turned off in the time slot of the cyclic prefix CP and the time slot of the symbol period Symbol, respectively, so as to provide driving voltages of different voltage levels to the driving chip 1321 in different time slots of a signal period T, so that the driving chip 1321 controls the field effect tube 131 to work in different characteristic intervals. That is, the field effect tube 131 forms current limiting in the time slot of the cyclic prefix CP when the field effect tube 131 is turned on to switch the coupling between the capacitance 14 and the power amplifier 104, and stabilizes voltage in the time slot of the symbol period Symbol, so as to form an effect of considering both transient current limiting and steady-state low-resistance conduction.

[0140] For example, the auxiliary source circuit 133 includes an isolation auxiliary source 1331, which is configured to receive an input power supply voltage V AUX and provide an initial driving voltage V0 to the two power supply branches 1332 based on the input power supply voltage V AUX In the embodiment shown in FIG. 8, the voltage level of the driving voltage V0 provided by the isolation auxiliary source 1331 is equal to the voltage level of the second driving voltage V2, and it can also be understood that the isolation auxiliary source 1331 provides the second driving voltage V2 to the two power supply branches 1332.

[0141] Specifically, the auxiliary source circuit 133 has two nodes U, including a first node U1 and a second node U2. The voltage level at the position of the first node U1 is equal to the voltage level of the initial driving voltage V0 output by the isolation auxiliary source 1331, and the voltage level at the position of the second node U2 is equal to the voltage level of the driving voltage provided by the auxiliary source circuit 133 to the driving chip 1321.

[0142] The two power supply branches 1332 are coupled between the two nodes U and are arranged in parallel. As shown in FIG. 8, the input ends of the two power supply branches 1332 are commonly coupled to the first node U1, and the output ends of the two power supply branches 1332 are commonly coupled to the second node U2.

[0143] The exemplary auxiliary power supply circuit 133 includes a linear voltage regulator 1333 connected in series with the first power supply branch 1332a. The linear voltage regulator 1333 can be used to convert the initial driving voltage V0 into the first driving voltage V1, i.e., the linear voltage regulator 1333 can convert the second driving voltage V2 into the first driving voltage V1.

[0144] It can be understood that the linear voltage regulator 1333 is coupled between the isolation auxiliary power supply 1331 and the driving chip 1321, and is connected in series with one of the power supply branches 1332. The linear voltage regulator 1333 can convert the voltage level of the driving voltage provided by the isolation auxiliary power supply 1331 to the power supply branch 1332 into another voltage level. That is, by adding the linear voltage regulator 1333 to the power supply branch 1332, the driving chip 1321 can be simultaneously provided with driving voltages of different voltage levels by one isolation auxiliary power supply 1331, which can meet the conduction requirements of the field effect transistor 131, reduce the number and layout space of the isolation auxiliary power supply 1331, and thus simplify the internal design of the symbol power tracking power supply 10 and achieve the miniaturization design of the symbol power tracking power supply 10.

[0145] The exemplary first power supply branch 1332a includes a first diode D1 coupled between the linear voltage regulator 1333 and the second node U2. The first diode D1 is used to realize the conduction or turn-off of the first power supply branch 1332a.

[0146] The exemplary second power supply branch 1332b includes a first transistor Q1 and a second diode D2 coupled between the first transistor Q1 and the second node U2. Specifically, the emitter of the first transistor Q1 is coupled to the first node U1, the base of the first transistor Q1 is coupled to the signal delay circuit 1322 through a second transistor Q2, and the collector of the first transistor Q1 is coupled to the second diode D2.

[0147] It can be understood that through the cooperative work of the first transistor Q1 and the second transistor Q2, the second diode D2 can be controlled to be turned on or turned off, and through the second diode D2, the conduction or turn-off effect of the second power supply branch 1332b can be realized.

[0148] In the embodiment shown in FIG. 8, when the driving module 132 needs the first driving voltage V1, the first transistor Q1, the second transistor Q2, and the second diode D2 are all in the off state, and the first diode D1 is in the on state. At this time, the first power supply branch 1322a is turned on, the second power supply branch 1322b is turned off, and the auxiliary power supply circuit 133 can provide the second driving voltage V2 to the driving module 132.

[0149] In the embodiment shown in FIG. 8, when the driving module 132 needs the second driving voltage V2, the first transistor Q1, the second transistor Q2 and the second diode D2 are all in the conducting state, and the first diode D1 is in the cut-off state. That is, the first power supply branch 1322a is turned off, the second power supply branch 1322b is turned on, and the driving voltage output by the auxiliary power supply circuit 133 is the second driving voltage V2.

[0150] For example, the driving module 132 includes a signal delay circuit 1322, which is coupled with the second transistor Q2 and is configured to delay the rising edge of the driving signal provided to the second transistor Q2, so that the second transistor Q2 is turned off in the cyclic prefix CP time slot and turned on in the symbol cycle Symbol time slot, thereby enabling the auxiliary power supply circuit 133 to provide different voltage levels to the field effect transistor 131 through the driving chip 1321 in the cyclic prefix CP time slot and the symbol cycle Symbol time slot, respectively, so that the field effect transistor 131 operates in different operating characteristic intervals in the cyclic prefix CP time slot and the symbol cycle Symbol time slot, respectively. The delay time is greater than or equal to the length of the cyclic prefix CP time slot of a signal cycle T.

[0151] It can be understood that, in the cyclic prefix CP time slot, the auxiliary power supply circuit 133 provides the first driving voltage V1 to the driving chip 1321, and the driving chip 1321 drives the field effect transistor 131 to operate in the constant current region based on the first driving voltage V1. Since the rising edge of the driving signal provided by the signal delay circuit 1322 to the second transistor Q2 has a delay, and the delay time can be equal to the length of the cyclic prefix CP time slot of a signal cycle T, when the cyclic prefix CP time slot ends and the symbol cycle Symbol time slot starts, the signal delay circuit 1322 drives the second transistor Q2 to be turned on at this time, thereby enabling the second power supply branch 1322b to be turned on and the first power supply branch 1322a to be turned off, and the driving voltage output by the auxiliary power supply circuit 133 is the second driving voltage V2.

[0152] That is, by adding the signal delay circuit 1322 to delay the rising edge of the control signal provided to the auxiliary power supply circuit 133 by a cyclic prefix CP time slot, the auxiliary power supply circuit 133 can be driven to output driving voltages with different timings to the driving chip 1321. Under the driving of driving signals with different timings and different voltage levels, the field effect transistor 131 operates in different operating characteristic intervals in the cyclic prefix CP time slot and the symbol cycle Symbol time slot, respectively, of a signal cycle T, thereby being able to form different conduction effects and taking into account the transient current limiting effect and the steady-state circuit efficiency.

[0153] In addition, by adding the signal delay circuit 1322, the multiplexing of the I / O port of the symbol power tracking control circuit 11 can be realized, thereby reducing the occupation of the I / O port (input / output port, communication interface) of the symbol power tracking control circuit 11, improving the functional utilization rate of the symbol power tracking control circuit 11, and further simplifying the internal structure design of the symbol power tracking power supply 10. That is, by delaying the rising edge of the control signal through the signal delay circuit 1322, the internal circuit structure of the switching unit 13 can be simplified, and the internal structure design of the symbol power tracking power supply 10 can be further simplified.

[0154] It should be noted that in the embodiments shown in FIGS. 7 and 8 of the present application, only one I / O port of the symbol power tracking control circuit 11 is coupled to the auxiliary source circuit 133 and the driving chip 1321, which is only an exemplary introduction, but it is not limited that the auxiliary source circuit 133 and the driving chip 1321 can only be coupled to one I / O port of the symbol power tracking control circuit 11. In the remaining embodiments of the present application, the auxiliary source circuit 133 and the driving chip 1321 can also be coupled to one or more I / O ports of the symbol power tracking control circuit 11. That is, the number or manner of coupling the auxiliary source circuit 133 and the driving chip 1321 to the I / O port of the symbol power tracking control circuit 11 can be adjusted according to the internal circuit design, functional design requirements and application scenarios of the symbol power tracking power supply 10, and the embodiments of the present application do not make specific limitations.

[0155] Please refer to FIGS. 9 and 10 together, FIG. 9 is a planar structure schematic diagram of the symbol power tracking power supply 10 of the present application after hiding part of the structure, and FIG. 10 is a circuit structure schematic diagram of the symbol power tracking power supply 10 of the present application. In order to clearly show the arrangement structure of the internal functional circuit or functional device of each switching unit 13 in the symbol power tracking power supply 10 provided by the embodiments of the present application, the DC-DC power supply 121, the DC-DC converter 122 and the remaining possible functional circuit or functional device in the symbol power tracking power supply 10 are hidden in the embodiment shown in FIG. 9. In FIG. 10, the circuit structure of any one of the plurality of switching units 13 is exemplarily introduced.

[0156] For example, the number of field effect tubes 131 is two, and the two field effect tubes 131 are connected in parallel. Specifically, each switching unit 13 includes two field effect tubes 131, which are connected in parallel between a switching capacitor 14 and a power amplifier 104, thereby forming two conduction branches 134 between the switching capacitor 14 and the power amplifier 104. That is, each field effect tube 131 is connected in series in a conduction branch 134, and the two conduction branches 134 are connected in parallel.

[0157] In the time slot of the cycle prefix CP of a signal period T, one field effect transistor 131 works in the constant current region, and the other field effect transistor 131 is off. In the time slot of the symbol period Symbol of a signal period T, one field effect transistor 131 works in the constant current region or is off, and the other field effect transistor 131 works in the variable resistance region.

[0158] In the embodiment shown in FIG. 9 and FIG. 10, in the time slot of the cycle prefix CP of a signal period T, the field effect transistor 131 working in the constant current region is the first field effect transistor 1311, and the conduction branch 134 in which the first field effect transistor 1311 is located is the first conduction branch 1341. The other field effect transistor 131 which is off is the second field effect transistor 1312, and the other conduction branch 134 in which the second field effect transistor 1312 is located is the second conduction branch 1342.

[0159] Specifically, the first field effect transistor 1311 is connected in series in the first conduction branch 1341, and the second field effect transistor 1312 is connected in series in the second conduction branch 1342. The input ends of the first conduction branch 1341 and the second conduction branch 1342 are coupled to the switching capacitor 14, and the output ends of the first conduction branch 1341 and the second conduction branch 1342 are coupled to the output bus BUS.

[0160] In the time slot of the cycle prefix CP of a signal period T, the first field effect transistor 1311 is on and works in the constant current region. The second field effect transistor 1312 is in the off state. At this time, since the first field effect transistor 1311 works in the constant current region, the coupling between the switching capacitor 14 and the power amplifier 104 is conducted through the first field effect transistor 1311, which can limit the transient current between the switching capacitor 14 and the power amplifier 104.

[0161] In the time slot of the symbol period Symbol of a signal period T, the second field effect transistor 1312 is on and works in the variable resistance region. At this time, since the second field effect transistor 1312 works in the variable resistance region, the coupling between the switching capacitor 14 and the power amplifier 104 is conducted through the second field effect transistor 1312, which can form a low-resistance conduction effect between the switching capacitor 14 and the power amplifier 104, thereby improving the steady-state efficiency of the circuit.

[0162] For example, in the time slot of the symbol period Symbol of a signal period T, the first field effect transistor 1311 can continue to work in the constant current region or can be off.

[0163] For example, the first field effect transistor 1311 is a linear field effect transistor with a wide linear region, and the second field effect transistor 1312 is a switch tube with low resistance characteristics.

[0164] For example, the two field effect tubes 131 can be linear field effect tubes.

[0165] It can be understood that each switch unit 13 includes two field effect tubes 131, which are connected in parallel between the switching capacitor 14 and the power amplifier, thereby forming two conducting branches 134 between the switching capacitor 14 and the power amplifier. By forming two conducting branches 134 between the switching capacitor 14 and the power amplifier, the conduction and non-conduction of the two conducting branches 134 are controlled in the time slot of the cyclic prefix CP and the time slot of the symbol period Symbol, respectively, so that different conduction effects are formed between the switching capacitor 14 and the power amplifier.

[0166] In the time slot of the cyclic prefix CP, one field effect tube 131 works in the constant current region, and the other field effect tube 131 is non-conductive, which can limit the switching current in the time slot of the cyclic prefix CP. In the time slot of the symbol period Symbol, both field effect tubes 131 are conductive, and the other field effect tube 131 works in the variable resistance region, which can improve the circuit steady-state efficiency. By controlling the conduction and non-conduction of the two conducting branches 134 in different time slots of a signal period T, the conduction efficiency or non-conduction efficiency of each field effect tube 131 can be improved, thereby improving the working performance and service life of the symbol power tracking power supply as a whole.

[0167] Please refer to FIG. 11, which is a working timing diagram of the symbol power tracking power supply 10 provided by the embodiment of the present application. In the embodiment shown in FIG. 11, the drive voltage provided by the auxiliary source circuit 133 of the switch unit 13 to the drive module 132 can be but is not limited to 6.7V in the time slot of the cyclic prefix CP and about 9.2V in the time slot of the symbol period Symbol.

[0168] For example, at the beginning of the cyclic prefix CP time slot, the drive voltage provided by the auxiliary source circuit 133 to the drive module 132 changes from 0V to 6.7V, and the field effect tube 131 is conductive and works in the constant current region. The field effect tube 131 connects one of the switching capacitors 14 to the output bus BUS, at which time the output bus BUS is charged and the voltage V BUS is 38V.

[0169] As shown in FIG. 11, when the field effect tube 131 works in the constant current region in the time slot of the cyclic prefix CP, the field effect tube 131 forms a significant current limiting effect between the switching capacitor 14 and the load. For example, the field effect tube 131 can limit the current value Icharge of the switching capacitor 14 and the load to about 120A.

[0170] For example, at the end of the time slot of the cyclic prefix CP, the voltage VBUS The output bus BUS is charged, the overshoot of the voltage of the output bus BUS can be inhibited, i.e. the overshoot of the voltage of the output bus BUS in the steady state of the voltage regulation can be inhibited.

[0171] For example, at the end of the time slot of the cyclic prefix CP and at the beginning of the time slot of the symbol period Symbol, the driving voltage provided by the auxiliary source circuit 133 to the driving module 132 is 9.2V, and the field effect transistor 131 is fully turned on and has a low on-resistance characteristic. By adjusting the driving voltage provided by the auxiliary source circuit 133 to the driving module 132, the field effect transistor 131 is fully turned on in the time slot of the symbol period Symbol, which can improve the circuit efficiency and reduce the switching ripple.

[0172] It can be understood that, in the non-working time slot of one signal period T of the radio frequency input signal RF IN , the symbol power tracking power supply 10 adjusts the voltage level of the supply voltage V PA to the required voltage level, and in the working time slot of one signal period T of the radio frequency input signal RF IN , the symbol power tracking power supply 10 maintains the supply voltage V PA provided to the load to be stable and unchanged, which can form the effect of segmented regulation of the supply voltage V PA , so that the symbol power tracking power supply 10 can provide a stable voltage when the load amplifies the signal, and further improve the working stability and working efficiency of the load.

[0173] In addition, the switching unit 13 of the symbol power tracking power supply 10 is equipped with the field effect transistor 131 as the main power switch, and the field effect transistor 131 has a wide linear region characteristic. When the symbol power tracking power supply 10 adjusts the voltage level of the supply voltage V PA , by changing the supply voltage provided to the field effect transistor 131, the field effect transistor 131 works in the constant current region to limit the size of the switching current I charge between the switching capacitor 14 and the output bus BUS through the field effect transistor 131.

[0174] In other words, the symbol power tracking power supply 10 of the present application adjusts the voltage level of the supply voltage V PA in the time slot of the cyclic prefix CP and stabilizes the voltage in the time slot of the symbol period Symbol through the cooperation between the switching unit 13 and the corresponding switching capacitor 14, which can improve the transmission efficiency of the power amplifier 104, reduce the requirement for bandwidth when the symbol power tracking power supply 10 regulates the voltage, and reduce the design requirement for the symbol power tracking power supply 10, thereby reducing the manufacturing cost and preparation difficulty of the symbol power tracking amplifier system 1000.

[0175] In addition, the plurality of switched capacitors 14 correspond to the plurality of switch units 13 one by one, and each switched capacitor 14 is preset with a voltage level. When the supply voltage V PA needs a certain size of voltage level, since the output voltage V OUT provided to each switched capacitor 14 is different, the voltage level of the supply voltage V PA can be adjusted to the required size by connecting the switched capacitor 14 corresponding to the required voltage level to the output bus BUS through a switch unit 13 in the time slot of the previous cyclic prefix CP of the symbol period Symbol. That is, by providing a plurality of switched capacitors 14, and each switched capacitor 14 is preset with a voltage level, the symbol power tracking power supply 10 can avoid repeatedly charging or discharging the same switched capacitor 14 during voltage regulation, thereby improving the voltage regulation efficiency of the symbol power tracking power supply 10, and improving the working performance and working stability of the symbol power tracking power supply 10.

[0176] Referring to FIG. 12, FIG. 12 is a working flow diagram of a symbol voltage regulation method provided by an embodiment of the present application. As shown in FIG. 12, the symbol voltage regulation method provided by the present application can be applied to the symbol power tracking amplification system 1000 in any of the above-mentioned implementation manners. Specifically, the symbol voltage regulation method of the present application includes the following steps:

[0177] S100, pre-charge each switched capacitor 14 to different voltage levels V C by the power supply topology 12;

[0178] For example, as shown in the embodiments of FIGS. 5-10, each switched capacitor 14 is coupled between the power supply topology 12 and the power amplifier 104, and the plurality of switched capacitors 14 are connected in parallel. The power supply topology 12 is used to supply power to the power amplifier 104 through one of the switched capacitors 14 in one signal period T.

[0179] Pre-charge each switched capacitor 14 to a preset voltage level by the power supply topology 12 during power-up, and keep each switched capacitor 14 at the preset voltage level V C unchanged, so that each switched capacitor 14 can store different electrical energy, so as to be able to provide the power amplifier 104 with different supply voltages V PA of different voltage levels according to the different supply voltages required by the power amplifier 104 in different signal periods T.

[0180] It can be understood that the voltage level V C of each switched capacitor 14 is pre-charged to different voltage levels V CWhen the power supply topology 12 supplies power to the power amplifier 104 through one of the switched capacitors 14, the effect of adjusting the supply voltage V PA of the power amplifier 104 can be achieved.

[0181] S200, at the moment when the cyclic prefix CP time slot of one signal period T starts, the field effect tube 131 of the switch unit 13 is used to turn on one of the switched capacitors 14 and the load;

[0182] Exemplarily, before the step S200, "at the moment when the cyclic prefix CP time slot of one signal period T starts, the field effect tube 131 of the switch unit 13 is used to turn on one of the switched capacitors 14 and the load", it further includes:

[0183] determining the supply voltage V PA required by the load in one signal period T PA1 .

[0184] Exemplarily, in any signal period T of the multiple signal periods T, the supply voltage V PA required by the power amplifier 104 is determined as the first voltage value V PA 1. Wherein the first voltage value V PA 1 matches the envelope of the radio frequency input signal RF IN .

[0185] Wherein, in the embodiments of the present application, only the supply voltage V PA required by the power amplifier 104 is exemplarily introduced as the first voltage value V PA 1, and the first voltage value V PA 1 does not represent and limit the specific voltage value.

[0186] It should be noted that the moment when the cyclic prefix CP time slot of one signal period T starts can be, but is not limited to, understood as a moment when the cyclic prefix CP time slot starts, and can also be understood as a time point when the cyclic prefix CP time slot starts. In the time period of the cyclic prefix CP time slot of one signal period T, it can be, but is not limited to, understood as a time period in the time slot range of the entire cyclic prefix CP of one signal period T.

[0187] S300, in the time period of the cyclic prefix CP time slot of one signal period T, the field effect tube 131 is controlled to work in the constant current region, and the supply voltage V PA of the load is adjusted to the first voltage value V PA 1 through one of the switched capacitors 14.

[0188] Please refer to FIG. 13 in combination with FIG. 7 and FIG. 8, which is a timing diagram of the driving voltage of the field effect tube 131 and the driving signal in the symbol voltage regulation method provided by the embodiment of the present application. In the embodiment shown in FIG. 13, the radio frequency input signal RF IN is taken as an example for illustrative introduction, and is shown as the ith signal period T and the (i+1)th signal period T in FIG. 13, and the (i+1)th signal period T is the next signal period T of the ith signal period T. The ith signal period T includes a first cyclic prefix CP1 and a first symbol period Symbol1, and the (i+1)th signal period T includes a second cyclic prefix CP2 and a second symbol period Symbol2.

[0189] For example, in the time slot of the first symbol period Symbol1 of the ith signal period T, the required supply voltage V PA of the load in the steady state is a first voltage value V PA 1. The power supply topology 12 turns on the field effect tube 131 to couple one of the switched capacitors 14 and the load, so as to adjust the supply voltage V PA provided to the load by the one of the switched capacitors 14 to the first voltage value V PA 1.

[0190] Specifically, in the embodiment shown in (a) of FIG. 13, the field effect tube 131 of the switching unit 13 is in the ith signal period T:

[0191] At the beginning of the time slot of the first cyclic prefix CP1, the driving chip 1321 provides the driving signal to the field effect tube 131 from 0 to a low-level driving signal based on the first driving voltage V1, so that the field effect tube 131 is turned on to be able to connect one of the switched capacitors 14 to the output bus BUS. And in the time slot of the first cyclic prefix CP1, the field effect tube 131 is driven to work in the constant current region, that is, the field effect tube 131 can form current limiting to the switched current between the switched capacitor 14 and the output bus BUS. The low-level driving signal can be understood as the driving signal provided by the driving chip 1321 to the field effect tube 131 corresponding to the first driving voltage V1 in the cyclic prefix CP time slot.

[0192] For example, when the required supply voltage V PA of the load in the steady state is the first voltage value V PA 1, one of the switched capacitors 14 is connected to the output bus BUS through the field effect tube 131, which can adjust the required supply voltage V PA of the load to the first voltage value V PA1. Meanwhile, as shown in Fig. 13(b), in the i-th signal period T, the driving chips 1321 in the rest of the switching units 13 provide 0 to the driving signals of the field effect tubes 131, so that the rest of the switching units 13 and the respective corresponding one of the switching capacitors 14 are turned off from the output bus BUS.

[0193] It can be understood that when the field effect tube 131 connects one of the switching capacitors 14 to the output bus BUS, the one of the switching capacitors 14 can charge or discharge the input capacitance C PA Constant current charging or discharging. And before the end of the time slot of the first cycle prefix CP1, the one of the switching capacitors 14 can charge or discharge the input capacitance C PA to the first voltage value V PA 1, so that the sign power tracking power supply 10 provides the power supply voltage V PA to the first voltage value V PA 1.

[0194] That is, because the field effect tube 131 in the switching unit 13 works in the constant current region, when the one of the switching capacitors 14 is coupled to the load, the charging current of the switching capacitor 14 is limited, thereby limiting the current peak value when the switching capacitor 14 is hard charged and suppressing the overshoot oscillation. That is, the sign voltage regulation method of the present application limits the transient current when the capacitor is hard charged without sacrificing the steady-state efficiency of the circuit, while suppressing the up and down of the voltage of the output bus BUS between the switching capacitor in the final state of the voltage regulation and the load, further improving the reliability of the sign voltage regulation method.

[0195] For example, in the step S200 of "at the moment when the cycle prefix CP time slot of one signal period T starts, turning on the coupling of one of the switching capacitors 14 to the load by the field effect tube 131 of the switching unit 13, and turning off the coupling of the rest of the switching capacitors 14 to the load by the field effect tube 131 of the rest of the switching units 13", the step S200 further includes:

[0196] At the moment when the cycle prefix CP time slot of one signal period T starts, turning on the coupling of one of the switching capacitors 14 to the load by the field effect tube 131 of the switching unit 13, wherein the voltage level of the one of the switching capacitors 14 is greater than the voltage level of the first voltage value V PA 1.

[0197] It can be understood that by selecting the one of the switching capacitors 14 with the voltage level greater than the first voltage value V PA 1 to supply power to the load, it can be ensured that the one of the switching capacitors 14 meets the power supply demand of the load, thereby improving the power supply reliability of the sign power tracking power supply 10.

[0198] The voltage level of the plurality of switched capacitors 14 is greater than the first voltage value V PA 1, and the difference between the voltage level of one of the plurality of switched capacitors 14 and the first voltage value V PA 1 is less than the voltage level of the plurality of switched capacitors V PA 1, and the difference between the voltage level of one of the plurality of switched capacitors 14 and the first voltage value V PA 1 is less than the voltage level of the plurality of switched capacitors V

[0199] That is, by selecting one of the plurality of switched capacitors 14 having the smallest voltage level difference from the first voltage value V PA 1, the voltage level of which is greater than the first voltage value V PA 1, the voltage level of which is greater than the first voltage value V PA 1, the voltage level of which is greater than the first voltage value V PA 1, the voltage level of which is greater than the first voltage value V

[0200] The voltage levels of the plurality of switched capacitors 14 in the sign power tracking power supply 10 are preset, and the voltage levels of the plurality of switched capacitors 14 are different. Among them, the number of the plurality of switched capacitors 14 having voltage levels greater than the first voltage value V PA 1 can be one, two or more. When there is only one switched capacitor 14 having a voltage level greater than the first voltage value V PA 1, the switched capacitor 14 is selected to be switched to the output bus BUS. When there are two or more switched capacitors 14 having voltage levels greater than the first voltage value V PA 1, the switched capacitor 14 having the smallest voltage level difference from the first voltage value V PA 1 is selected to be switched to the output bus BUS.

[0201] For example, after the step S300 "controlling the field effect tube 131 to work in the constant current area, and adjusting the supply voltage V PA of the load to the first voltage value V PA 1 through one of the plurality of switched capacitors 14 in the time period of the cyclic prefix CP time slot of one signal period T", the sign voltage regulation method of the present application further comprises:

[0202] controlling the field effect tube 131 to work in the variable resistance area in the symbol period Symbol time slot of one signal period T, wherein the field effect tube 131 is a linear field effect tube.

[0203] As shown in FIG. 13, the low-level driving signal of the first cycle prefix CP1 becomes a high-level driving signal, and the supply voltage applied to the field effect tube 131 changes from the second driving voltage V2 to the first driving voltage V1. During the time slot of the first symbol period Symbol1, the field effect tube 131 works in the variable resistance region, i.e., the field effect tube 131 is fully turned on.

[0204] When the field effect tube 131 is in the fully turned-on state, at least one of the switching capacitor 14 and the power supply topology 12 can pass the input capacitor C PA to the load. At this time, the switching unit 13 has a low on-resistance characteristic, so as to be able to maintain the supply voltage V PA stable and unchanged.

[0205] At the end of the time slot of the first symbol period Symbol1, the driving signal provided by the driving chip 1321 to the field effect tube 131 changes from the high-level driving signal to 0, and the driving voltage of the field effect tube 131 changes from the second driving voltage V2 to the first driving voltage V1. Since the driving signal provided by the driving chip 1321 to the field effect tube 131 is 0, the field effect tube 131 is in the off state, so that the switching capacitor 14 is disconnected from the output bus BUS. That is, the field effect tube 131 disconnects the connection between the switching capacitor 14 and the output bus BUS.

[0206] It can be understood that the linear field effect tube has a wide linear region, and by setting the linear field effect tube as the main power switch between the switching capacitor 14 and the load, the current peak value of the hard charging of the switching capacitor 14 can be limited, the current limiting accuracy of the field effect tube 14 can be improved, and the case that the device parameter error or the temperature influence on the device may affect the current limiting effect can be avoided.

[0207] That is, by setting the switching device between the switching capacitor 14 and the load as the linear field effect tube, the current limiting accuracy can be improved, the overshoot oscillation can be further suppressed, and the working reliability of the symbol voltage regulation method can be improved. By setting the switching device between the switching capacitor 14 and the load as the linear field effect tube, compared with the closed-loop scheme, the voltage or current detection circuit with high accuracy and bandwidth requirements can be omitted.

[0208] At the same time, the linear field effect tube also has a low-resistance on characteristic, and during the time slot of the symbol period Symbol, the supply voltage V PA stable, so by setting the switching device as the linear field effect tube, the low-resistance on between the switching capacitor 14 and the load during the time slot of the symbol period Symbol can be realized, and the steady-state efficiency can be improved.

[0209] Please refer to FIG. 14 in combination with FIG. 9 and FIG. 10, which is a timing diagram of the driving voltage of the field effect transistor 131 and the driving signal in the symbol voltage regulation method provided by the embodiment of the present application. In the embodiments shown in FIG. 9 and FIG. 10 and FIG. 14, the step S300 "controlling the field effect transistor 131 to work in the constant current region and regulating the supply voltage V PA to the first voltage value V PA 1", comprises:

[0210] controlling the other field effect transistor 131 to be off, and regulating the supply voltage V PA to the first voltage value V PA1 , wherein the number of the field effect transistors 131 is two, and the two field effect transistors 131 are connected in parallel.

[0211] Each of the switch units 13 comprises two field effect transistors 131 connected in parallel between the switching capacitor 14 and the load, thereby forming two conducting branches between the switching capacitor 14 and the load. By forming the two conducting branches between the switching capacitor 14 and the load, the conducting and off of the two conducting branches are controlled respectively in the cyclic prefix CP time slot and the symbol time slot, so that different conducting effects are formed between the switching capacitor 14 and the load.

[0212] It can be understood that, by controlling the two field effect transistors 131 to be sequentially conducted and off in different time slots of a signal cycle T, the conducting efficiency or off efficiency of each field effect transistor 131 can be improved, thereby improving the voltage regulation efficiency of the symbol voltage regulation method.

[0213] For example, in the step S300 "controlling the field effect transistor 131 to work in the constant current region and regulating the supply voltage V PA to the first voltage value V PA1 , wherein the number of the field effect transistors 131 is two, and the two field effect transistors 131 are connected in parallel", comprises:

[0214] controlling the other field effect transistor 131 to work in the variable resistance region in the symbol time slot of the signal cycle T.

[0215] For example, when there are two field-effect transistors 131, the first driving voltage V1 can be, but is not limited to, 5.5V. During the time period of the cyclic prefix CP time slot of a signal period T, the first driving voltage V1 drives one field-effect transistor 131 to work in the constant current region, so that one field-effect transistor 131 can limit the switching current between one of the switching capacitors 14 and the load to about 40A.

[0216] For example, when there are two field-effect transistors 131, the first driving voltage V1 can be, but is not limited to, 6.3V. During the time period of the cyclic prefix CP time slot of a signal period T, the first driving voltage V1 drives one field-effect transistor 131 to work in the constant current region, so that one field-effect transistor 131 can limit the switching current between one of the switching capacitors 14 and the load to about 80A.

[0217] Understandably, by using the field-effect transistor 131 to limit the switching current between one of the switching capacitors 14 and the load, the peak value of the switching current can be reduced, the energy stored in the parasitic inductance of the PDN network can be reduced, and the overshoot, undershoot and oscillation of the final voltage of the voltage regulation can be suppressed.

[0218] Please refer to Figure 15 in conjunction with Figures 5-10. Figure 15 shows the supply voltage V to the load provided by the symbolic voltage regulation method according to the embodiments of this application. PA The timing diagram is shown. In the consecutive i-th signal period T and i+1-th signal period T, the symbol voltage regulation method provided in this application provides a supply voltage V to the load. PA The difference lies in the method of voltage regulation described in this application, which provides the supply voltage V to the load. PA It can fit the radio frequency input signal RF IN The envelope.

[0219] In the embodiment shown in Figure 15, the load is shown to be attached to the radio frequency input signal RF during the i-th signal period T. IN Envelope supply voltage V PA The first voltage value V PA 1. The load is attached to the RF input signal RF during the (i+1)th signal cycle T. IN Envelope supply voltage V PA The second voltage value V PA 2. The diagram illustrates that power supply topology 12 supplies power to the load through the first switching capacitor 14a and the second switching capacitor 14b of power supply topology 12.

[0220] For example, the first voltage value V PA The voltage level of 1 is less than the second voltage value V. PA 2. Voltage level.

[0221] As shown in FIG. 15, in the first cycle CP1 time slot of the ith signal period T, the first field effect transistor 1311 is turned on and works in the constant current region, and the first switched capacitor 14a is connected to the output bus BUS. At this time, the first switched capacitor 14a can charge or discharge the load in constant current. Before the end of the first cycle CP1 time slot, the first switched capacitor 14a will provide the supply voltage V PA adjusted to the first voltage value V PA 1.

[0222] In the first symbol period Symbol1 time slot of the ith signal period T, the first field effect transistor 1311 works in the variable resistance region, so that the first switched capacitor 14a and the load are low-resistance on. At this time, the first switched capacitor 14a will provide the supply voltage V PA maintained at the first voltage value V PA 1, so that the supply voltage V PA of the load in the ith signal period T conforms to the envelope of the radio frequency input signal RF IN , which can improve the working performance and efficiency of the load.

[0223] After the end of the first symbol period Symbol1 time slot of the ith signal period T, before the start of the second cycle prefix CP2 time slot of the ith+1 signal period T, the first field effect transistor 1311 is turned off.

[0224] In the second cycle prefix CP2 time slot of the ith+1 signal period T, the second field effect transistor 1312 is turned on and works in the constant current region, and the second switched capacitor 14b is connected to the output bus BUS. At this time, since the voltage level of the second voltage value V PA 2 required by the load is greater than the voltage level of the first voltage value V PA 1, the second switched capacitor 14b can charge the load in constant current. Before the end of the second cycle prefix CP2 time slot, the second switched capacitor 14b will provide the supply voltage V PA adjusted to the second voltage value V PA 2.

[0225] In the second symbol period Symbol2 time slot of the ith+1 signal period T, the second field effect transistor 1312 works in the variable resistance region, so that the second switched capacitor 14b and the load are low-resistance on. At this time, the second switched capacitor 14b will provide the supply voltage V PA maintained at the second voltage value V PA 2.

[0226] Of course, the above various embodiments can be applied alone or in combination. The above is the preferred embodiment of the application, and it should be pointed out that for those skilled in the art, without departing from the principles of the application, a number of improvements and refinements can be made, which are also considered within the scope of protection of the application.

Claims

1. A symbol power tracking power supply for regulating the supply voltage to a load, characterized by, The power supply topology, a plurality of switched capacitors, and a plurality of switching units are included, each of the switched capacitors is coupled between the power supply topology and the load, each of the switching units is coupled between one of the switched capacitors and the load, voltage levels of each of the switched capacitors are different, and the power supply topology is configured to supply power to the load by one of the plurality of switched capacitors in one signal period. Each of the switching units includes at least one field effect transistor, and the at least one field effect transistor is configured to turn on the one of the switched capacitors and the load, wherein, in a cyclic prefix time slot of the one signal period, the at least one field effect transistor operates in a constant current region.

2. The symbol power tracking power supply of claim 1, wherein, Each of the switching units includes one field effect transistor, and the one field effect transistor is coupled between the one of the switched capacitors and the load, wherein: In a symbol period time slot of the one signal period, the one field effect transistor operates in a variable resistance region.

3. The symbol power tracking power supply of claim 2, wherein, The switching unit further includes an auxiliary source circuit, and the auxiliary source circuit is configured to provide a first driving voltage and a second driving voltage, the first driving voltage is configured to drive the one field effect transistor to operate in the constant current region, and the second driving voltage is configured to drive the one field effect transistor to operate in the variable resistance region.

4. The symbol power tracking power supply of claim 3, wherein, The auxiliary source circuit includes two power supply branches, one of the power supply branches is configured to provide the first driving voltage, and the other of the power supply branches is configured to provide the second driving voltage, wherein: The two power supply branches are connected in parallel. In the cyclic prefix time slot of the one signal period, the one power supply branch is turned on, and the other power supply branch is turned off. In the symbol period time slot of the one signal period, the one power supply branch is turned off, and the other power supply branch is turned on.

5. The symbol power tracking power supply of claim 4, wherein, The auxiliary source circuit further includes an isolation auxiliary source and a linear voltage regulator, the isolation auxiliary source is configured to provide the second driving voltage to the two power supply branches, and the linear voltage regulator is connected in series in the one power supply branch, and the linear voltage regulator is configured to convert the second driving voltage into the first driving voltage. Each of the switching units includes two field effect transistors, and the two field effect transistors are connected in parallel, wherein:

6. The symbol power tracking power supply of claim 1, wherein, In the cyclic prefix time slot of the one signal period, one of the field effect transistors operates in the constant current region, and the other of the field effect transistors is turned off. In the symbol period time slot of the one signal period, the one field effect transistor operates in the constant current region or is turned off, and the other field effect transistor operates in the variable resistance region. The at least one field effect transistor is a linear field effect transistor.

7. A symbol power tracking power supply according to any one of claims 1-6, characterized in that, When the at least one field effect transistor of one of the switching units of the plurality of switching units turns on the coupling between the one of the switched capacitors and the load, the remaining switching units of the plurality of switching units are all turned off the coupling between the switched capacitors corresponding to the remaining switching units and the load.

8. A symbol power tracking power supply according to any one of claims 1-7, characterized in that, The radio frequency circuit is configured to generate a radio frequency input signal, and the power amplifier is configured to amplify the radio frequency input signal generated by the radio frequency circuit.

9. A symbol power tracking amplification system, characterized by, ​ ​ A symbol power tracking power supply includes a power supply topology, a plurality of switched capacitors, and a plurality of switch units, each of the switched capacitors is coupled between the power supply topology and the power amplifier, each of the switch units is coupled between one of the switched capacitors and the power amplifier, each of the switched capacitors has a different voltage level, the power supply topology tracks a radio frequency input signal generated by the radio frequency circuit, and provides a supply voltage for the power amplifier by one of the switched capacitors in a signal period of the radio frequency input signal generated by the radio frequency circuit, wherein: The voltage level of the one of the switched capacitors matches an envelope of the radio frequency input signal generated by the radio frequency circuit. Each of the switch units includes at least one field effect transistor for turning on the one of the switched capacitors and the power amplifier, and the at least one field effect transistor operates in a constant current region in a cyclic prefix time slot of the signal period.

10. The symbol power tracking amplification system of claim 9, wherein, Each of the switch units includes one field effect transistor coupled between the one of the switched capacitors and the power amplifier, wherein: The one field effect transistor operates in a variable resistance region in the symbol period time slot of the signal period.

11. The symbol power tracking amplification system of claim 9, wherein, Each of the switch units includes two field effect transistors in parallel, wherein: In the cyclic prefix time slot of the signal period, one of the field effect transistors operates in a constant current region, and the other field effect transistor is turned off. In the symbol period time slot of the signal period, the one field effect transistor operates in a constant current region or is turned off, and the other field effect transistor operates in a variable resistance region.

12. A symbol voltage regulation method, characterized by, It includes: Pre-charging each of the switched capacitors to a different voltage level by a power supply topology; At a time when a cyclic prefix time slot of a signal period starts, turning on one of the switched capacitors and a load by a field effect transistor of a switch unit; In a time period of the cyclic prefix time slot of the signal period, controlling the field effect transistor to operate in a constant current region, and adjusting a supply voltage of the load to a first voltage value by the one of the switched capacitors.

13. The method of claim 12, wherein, At the time when the cyclic prefix time slot of the signal period starts, turning on one of the switched capacitors and a load by a switch unit, further includes: Determining that the supply voltage required by the load in the signal period is the first voltage value.

14. The method of claim 12 or 13, wherein, The turning on of the coupling between the one of the switched capacitors and the load by the field effect transistor of the switch unit includes: At the time when the cyclic prefix time slot of the signal period starts, turning on the coupling between the one of the switched capacitors and the load by the field effect transistor of the switch unit, wherein the voltage level of the one of the switched capacitors is greater than the voltage level of the first voltage value.

15. The method of claim 12-14, wherein, After the adjusting of the supply voltage of the load to the first voltage value by the one of the switched capacitors, further includes: In a symbol period time slot of the one signal period, the field effect tube is controlled to work in a variable resistance region, wherein the field effect tube is a linear field effect tube.

16. The method of claim 12-14, wherein, The control of the field effect tube to work in the constant current region and the adjustment of the supply voltage of the load to the first voltage value through the one switching capacitor include: In a cyclic prefix time slot of the one signal period, the field effect tube is controlled to work in the constant current region, and another field effect tube is controlled to be turned off, and the supply voltage of the load is adjusted to the first voltage value through the one switching capacitor, wherein the number of the field effect tubes is two, and the two field effect tubes are connected in parallel. The adjustment of the supply voltage of the load to the first voltage value through the one switching capacitor is followed by: In a symbol period time slot of the one signal period, the other field effect tube is controlled to work in a variable resistance region.

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