Digital control oscillation circuit, phase-locked loop, chip and equipment

Abstract

The invention provides a digital control oscillation circuit, a phase-locked loop, a chip and equipment, the digital control oscillation circuit comprises a control circuit and an oscillator, the control circuit is connected with the oscillator, and the control circuit is used for being connected with a power supply; when the control circuit is connected with the power supply and the power supply voltage of the power supply changes, the control circuit keeps the magnitude of the current provided for the oscillator unchanged, and / or when the temperature of the oscillator changes, the control circuit adjusts the magnitude of the current provided for the oscillator so as to carry out temperature compensation on the oscillator. Therefore, the control circuit can be used for improving the voltage stability and the temperature stability of the oscillator, so that the stability and the optimization convenience of the digital control oscillation circuit can be improved. While the digital control oscillation circuit can optimize the voltage stability of the oscillator through the control circuit, the stability optimization effect of the digital control oscillator circuit can be improved under the condition that the temperature stability of the oscillator is optimized.

Description

Technical Field

[0001] The present application relates to the field of signal processing technology, and in particular to a digitally controlled oscillator circuit, a phase-locked loop, a chip, and a device. Background Art

[0002] Currently, phase-locked loops (PLLs) are used in data processing equipment. Digitally controlled oscillator circuits (DCOSs) are key modules in PLLs. However, in the design of DCOSs, it is often difficult to optimize their stability, which in turn leads to poor stability optimization results. Summary of the Invention

[0003] The main purpose of this application is to provide a digitally controlled oscillator circuit, a phase-locked loop, a chip and a device, aiming to solve the technical problem of poor stability optimization effect of the digitally controlled oscillator circuit due to poor convenience in optimizing the stability of the digitally controlled oscillator circuit.

[0004] In a first aspect, the present application provides a digitally controlled oscillator circuit, comprising a control circuit and an oscillator, wherein the control circuit is connected to the oscillator and is configured to be connected to a power supply;

[0005] The control circuit maintains the magnitude of the current provided to the oscillator unchanged when the control circuit is connected to a power supply and the power supply voltage of the power supply changes, and / or the control circuit adjusts the magnitude of the current provided to the oscillator when the temperature of the oscillator changes to perform temperature compensation on the oscillator.

[0006] In a second aspect, the present application provides a phase-locked loop, which includes the digitally controlled oscillation circuit as described above.

[0007] In a third aspect, the present application provides a computing power chip, which includes the phase-locked loop as described above.

[0008] In a fourth aspect, the present application provides a data processing device, which includes the computing power chip as described above.

[0009] The present application provides a digitally controlled oscillator circuit, a phase-locked loop, a chip, and a device. The digitally controlled oscillator circuit includes a control circuit and an oscillator. The control circuit is connected to the oscillator and is used to connect to a power supply. When the control circuit is connected to the power supply and the power supply voltage changes, the control circuit maintains the current provided to the oscillator unchanged, and / or when the temperature of the oscillator changes, the control circuit adjusts the current provided to the oscillator to perform temperature compensation for the oscillator.

[0010] Since the magnitude of the current provided by the control circuit to the oscillator remains unchanged when the power supply voltage of the power supply changes, the voltage of the oscillator can be kept unchanged to improve the voltage stability of the oscillator. Since the control circuit adjusts the magnitude of the current provided to the oscillator when the temperature changes, the oscillator can be temperature compensated to reduce the adverse effects of the temperature change of the oscillator on the oscillation frequency of the oscillator, thereby improving the temperature stability of the oscillator. Based on this, while the voltage stability and temperature stability of the oscillator are improved, the stability optimization of the digitally controlled oscillator circuit can be achieved, which is conducive to improving the convenience of stability optimization of the digitally controlled oscillator circuit. Accordingly, based on the setting of the control circuit in the digitally controlled oscillator circuit, the voltage stability of the oscillator can be optimized while optimizing the temperature stability of the oscillator, which is conducive to improving the stability optimization effect of the digitally controlled oscillator circuit. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] Figure 1 A schematic block diagram of the structure of a digitally controlled oscillator circuit provided in an embodiment of the present application;

[0012] Figure 2 Schematic diagram of the structure of a digital controlled oscillator circuit according to an embodiment of the present application;

[0013] Figure 3 1 is a circuit diagram of a digitally controlled oscillator circuit according to an embodiment of the present application;

[0014] Figure 4 A schematic structural diagram of an oscillator according to an embodiment of the present application;

[0015] Figure 5 Schematic diagram of the structure of an oscillator according to another embodiment of the present application;

[0016] Figure 6 A schematic block diagram of the structure of a phase-locked loop provided in an embodiment of the present application.

[0017] Explanation of the accompanying symbols: 10, phase-locked loop; 100, digitally controlled oscillation circuit; 110, control circuit; 111, current source; 112, positive voltage coefficient circuit; 113, negative voltage coefficient circuit; 114, temperature coefficient circuit; 115, switch array; 120, oscillator; 121, oscillator outer loop; 122, feedforward loop. DETAILED DESCRIPTION

[0018] The following will be combined with the drawings in the embodiments of this application to clearly and completely describe the technical solutions in the embodiments of this application. Obviously, the embodiments described are part of the embodiments of this application, not all of them. Based on the embodiments in this application, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of this application.

[0019] In the description of this application, unless otherwise specified or limited, the terms "mounted," "connected," and "connected" should be understood broadly. For example, they can refer to fixed, detachable, or integral connections; mechanical or electrical connections; direct or indirect connections through an intermediary; and internal communication between two components. Those skilled in the art will understand the specific meanings of these terms in this application based on the specific circumstances.

[0020] In related technologies, the oscillation frequency of a digitally controlled oscillator can be controlled by the following control strategy:

[0021] (1) The number of effective oscillation units participating in the oscillation in the ring oscillator chain corresponding to the digitally controlled oscillator is controlled by a digital code.

[0022] (2) Control the power supply voltage or current of the digitally controlled oscillator through a digital code.

[0023] For control strategy (1), when the length of the ring oscillator chain corresponding to the digitally controlled oscillator changes, the phase noise of the digitally controlled oscillator is more obvious. In addition, when the chain length is switched, it is easy to introduce large spurious noise.

[0024] Control strategy (1) can only be used to control the oscillation frequency of the digital controlled oscillator, but it is difficult to take into account the stability requirements of the digital controlled oscillator.

[0025] For control strategy (2), a digitally controlled oscillator can be composed of a digital-to-analog converter (DAC) and an oscillator. The DAC can use a low-dropout regulator (LDO) or a bandgap reference circuit as the power supply for the oscillator. LDO and bandgap circuits generally include a negative feedback circuit composed of an operational amplifier. Negative feedback circuits have specific bandwidth requirements, such as requiring the bandwidth of the negative feedback circuit to be greater than the loop bandwidth of the phase-locked loop. These specific bandwidth requirements can easily increase the power consumption of the digitally controlled oscillator.

[0026] Furthermore, the oscillator itself has poor temperature and voltage stability. Optimizing the oscillator's stability internally is equivalent to adding an extra load, which results in higher power consumption.

[0027] Based on this, there is an urgent need to improve the digitally controlled oscillator to improve the convenience of optimizing the stability of the digitally controlled oscillator, thereby improving the stability optimization effect of the digitally controlled oscillator. Accordingly, it is also necessary to improve the convenience of controlling the power consumption of the digitally controlled oscillator. For example, the digitally controlled oscillator circuit 100 provided in the embodiment of the present application can be used to improve the convenience of optimizing the stability of the digitally controlled oscillator circuit 100, thereby improving the stability optimization effect of the digitally controlled oscillator circuit 100. Accordingly, the digitally controlled oscillator circuit 100 provided in the embodiment of the present application can also improve the convenience of controlling the power consumption of the digitally controlled oscillator circuit 100.

[0028] The following describes some embodiments of the present application in detail with reference to the accompanying drawings. In the absence of conflict, the following embodiments and features in the embodiments may be combined with each other.

[0029] See also Figure 1 , Figure 1 Schematic diagram of the structure of a digitally controlled oscillation circuit 100 provided in an embodiment of the present application.

[0030] See also Figure 1 The digitally controlled oscillation circuit 100 includes a control circuit 110 and an oscillator 120. The control circuit 110 is connected to the oscillator 120 and is used to connect to a power supply. When the control circuit 110 is connected to the power supply and the power supply voltage of the power supply changes, the control circuit 110 maintains the current provided to the oscillator 120 unchanged, and / or when the temperature of the oscillator 120 changes, the control circuit 110 adjusts the current provided to the oscillator 120 to perform temperature compensation for the oscillator 120.

[0031] When the control circuit 110 is connected to a power supply, the power supply can provide a voltage to the control circuit 110, and the control circuit 110 can determine the power supply voltage of the power supply to detect changes in the power supply voltage of the power supply. For example, the control circuit 110 can determine the power supply voltage provided by the power supply to the control circuit 110 based on the connection relationship between the control circuit 110 and the power supply, and detect changes in the power supply voltage based on the power supply voltage provided by the power supply to the control circuit 110. For example, the power supply voltage provided by the power supply to the control circuit 110 at time 1 is voltage 1, and the power supply voltage provided to the control circuit 110 at time 2 is voltage 2, and time 1 is before time 2, and time 1 and time 2 are two adjacent times, if voltage 1 is different from voltage 2, then the control circuit 110 can determine that the power supply voltage of the power supply has changed. Of course, the way in which the control circuit 110 detects changes in the power supply voltage is not limited to this and is not limited here.

[0032] When the voltage of the power supply connected to the control circuit 110 fluctuates, that is, when the power supply voltage changes, the control circuit 110 can maintain the current provided to the oscillator 120 at a constant level. This means that the control circuit 110 can provide a stable current to the oscillator 120. When the control circuit 110 provides a stable current to the oscillator 120, the oscillation frequency of the oscillator 120 can remain constant.

[0033] Under the action of the control circuit 110 , the oscillator 120 can maintain an oscillation frequency unchanged when the power supply voltage changes, which is beneficial to improving the voltage stability of the oscillator 120 .

[0034] The control circuit 110 may obtain the temperature of the oscillator 120 to detect a temperature change of the oscillator 120. For example, the control circuit 110 is connected to the oscillator 120. Based on the connection relationship between the control circuit 110 and the oscillator 120, the control circuit 110 may obtain the temperature of the oscillator 120 and determine the temperature change of the oscillator 120.

[0035] When the temperature of the oscillator 120 changes, the control circuit 110 can adjust the current provided to the oscillator 120 to perform temperature compensation on the oscillator 120. The temperature of the oscillator 120 may change, for example, as the operating time of the oscillator 120 increases. For example, as the operating time increases, the temperature of the oscillator 120 increases. The oscillator 120 itself has corresponding temperature characteristics. For example, if the oscillation frequency of the oscillator 120 decreases when the temperature of the oscillator 120 increases, it can be determined that the oscillator 120 has a negative temperature characteristic. If the oscillation frequency of the oscillator 120 increases when the temperature of the oscillator 120 decreases, it can be determined that the oscillator 120 has a positive temperature characteristic.

[0036] In some embodiments, since the oscillation frequency of the oscillator 120 is affected by the temperature change of the oscillator 120, the current provided to the oscillator 120 can be adjusted by the control circuit 110 to perform temperature compensation on the oscillator 120, thereby keeping the oscillation frequency of the oscillator 120 unchanged.

[0037] Take, for example, the case where the oscillator 120 has a negative temperature characteristic. When the temperature of the oscillator 120 increases, if the current received by the oscillator 120 remains unchanged, the oscillation frequency of the oscillator 120 will decrease. The control circuit 110 can increase the current supplied to the oscillator 120. Accordingly, the oscillator 120 can use the increased current to increase the oscillation frequency of the oscillator 120, thereby compensating for the change in oscillation frequency caused by the temperature change of the oscillator 120. When the temperature of the oscillator 120 decreases, if the current received by the oscillator 120 remains unchanged, the oscillation frequency of the oscillator 120 will increase. The control circuit 110 can decrease the current supplied to the oscillator 120. Accordingly, the oscillator 120 can use the decreased current to decrease the oscillation frequency of the oscillator 120, thereby compensating for the change in oscillation frequency caused by the temperature change of the oscillator 120.

[0038] Under the action of the control circuit 110 , the oscillator 120 can maintain an oscillation frequency unchanged when the temperature changes, which is beneficial to improving the temperature stability of the oscillator 120 .

[0039] Based on the configuration of the control circuit 110, the control circuit 110 can be used to improve the voltage stability and temperature stability of the oscillator 120, which is beneficial to the convenience and stability optimization effect of the digital controlled oscillator circuit 100. In addition, because the control circuit 110 is arranged outside the oscillator 120, when the oscillator 120 is designed according to low power consumption constraints, the control circuit 110 will not affect the operation of the oscillator 120, nor will it increase the internal load of the oscillator 120. Therefore, the control circuit 110 will not increase the power consumption of the oscillator 120. Based on this, while the voltage stability and temperature stability of the oscillator 120 are improved, the control circuit 110 will not increase the power consumption of the oscillator 120. This is beneficial to improving the stability optimization effect of the digital controlled oscillator circuit 100 while improving the convenience of power consumption control of the digital controlled oscillator circuit 100.

[0040] In some embodiments, the control circuit 110 includes a current source 111, a positive voltage coefficient circuit 112, and a negative voltage coefficient circuit 113. The current source 111 is connected to the oscillator 120, and the current source 111 is used to connect to a power supply. The positive voltage coefficient circuit 112 and the negative voltage coefficient circuit 113 are connected to the current source 111. When the power supply voltage provided by the current source 111 changes, the voltage change corresponding to the positive voltage coefficient circuit 112 and the voltage change corresponding to the negative voltage coefficient circuit 113 have opposite change trends, so as to keep the current provided by the current source 111 to the oscillator 120 unchanged according to the voltage change corresponding to the positive voltage coefficient circuit 112 and the voltage change corresponding to the negative voltage coefficient circuit 113.

[0041] like Figure 2 As shown, the control circuit 110 may include a current source array. The current source array may include multiple current sources 111. Since the current source 111 can achieve discrete control with high linearity by superimposing multiple copies, the current source 111 can be used in the control circuit 110 to power the oscillator 120. Each current source 111 in the current source array can be connected to the oscillator 120, the positive voltage coefficient circuit 112, and the negative voltage coefficient circuit 113, respectively, and the current source 111 is used to connect to a power supply. When the current source 111 is connected to the power supply, if the power supply voltage provided by the power supply to the current source 111 changes, that is, the power supply voltage fluctuates, the control circuit 110 can use the positive voltage coefficient circuit 112 and the negative voltage coefficient circuit 113 to compensate for the power supply voltage fluctuation based on the connection relationship between the current source 111 and the positive voltage coefficient circuit 112 and the negative voltage coefficient circuit 113, respectively, to maintain the current provided by the current source 111 to the oscillator 120 unchanged. Accordingly, when the magnitude of the current provided by each current source 111 in the current source array to the oscillator 120 remains unchanged, it can be determined that the magnitude of the current provided by the current source array to the oscillator 120 remains unchanged.

[0042] For example, when the power supply voltage provided by the power supply to current source 111 changes, the voltage changes corresponding to positive voltage coefficient circuit 112 and negative voltage coefficient circuit 113 are different, and the trends of the voltage changes corresponding to positive voltage coefficient circuit 112 and negative voltage coefficient circuit 113 are opposite. For example, the voltage change corresponding to positive voltage coefficient circuit 112 is smaller than the voltage change corresponding to the power supply voltage, while the voltage change corresponding to negative voltage coefficient circuit 113 is larger than the voltage change corresponding to power supply voltage. The difference between the voltage change corresponding to the power supply voltage and the voltage change corresponding to positive voltage coefficient circuit 112 is a positive number. The difference between the voltage change corresponding to power supply voltage and the voltage change corresponding to negative voltage coefficient circuit 113 is a negative number. Based on this, it can be determined that the voltage change corresponding to positive voltage coefficient circuit 112 and the voltage change corresponding to negative voltage coefficient circuit 113 have opposite trends. Since the voltage change corresponding to positive voltage coefficient circuit 112 is smaller than the voltage change corresponding to the power supply voltage, the positive voltage coefficient circuit 112 can cause a portion of the current in current source 111 to increase. Because the voltage change corresponding to the negative voltage coefficient circuit 113 is greater than the voltage change corresponding to the power supply voltage, the negative voltage coefficient circuit 113 can cause a portion of the current in the current source 111 to decrease. Under the combined action of the positive voltage coefficient circuit 112 and the negative voltage coefficient circuit 113, when the power supply voltage provided by the current source 111 changes, the increase in current in each current source 111 corresponding to the positive voltage coefficient circuit 112 and the decrease in current in each current source 111 corresponding to the negative voltage coefficient circuit 113 can offset each other, thereby maintaining the current provided by the current source 111 to the oscillator 120 unchanged.

[0043] The positive voltage coefficient circuit 112 and the negative voltage coefficient circuit 113 enable the current source 111 to provide a constant current to the oscillator 120 even when the power supply voltage changes, thereby maintaining the oscillation frequency of the oscillator 120, thereby improving the voltage stability of the oscillator 120. Accordingly, since the positive voltage coefficient circuit 112 and the negative voltage coefficient circuit 113 are disposed outside the oscillator 120, if the oscillator 120 is designed to be low power, the positive voltage coefficient circuit 112 and the negative voltage coefficient circuit 113 do not affect the operation of the oscillator 120, nor do they increase the internal load of the oscillator 120. Consequently, the positive voltage coefficient circuit 112 and the negative voltage coefficient circuit 113 do not increase the power consumption of the oscillator 120, thereby improving the stability optimization effect of the digitally controlled oscillator circuit 100 while enhancing the convenience of power consumption control of the digitally controlled oscillator circuit 100.

[0044] In some embodiments, the control circuit 110 further includes a temperature coefficient circuit 114, which is connected to the positive voltage coefficient circuit 112 and the negative voltage coefficient circuit 113; the temperature coefficient circuit 114 increases the current provided by the current source 111 to the oscillator 120 when the temperature of the oscillator 120 increases, and decreases the current provided by the current source 111 to the oscillator 120 when the temperature of the oscillator 120 decreases.

[0045] like Figure 2 As shown, the temperature coefficient circuit 114 is connected to the positive voltage coefficient circuit 112 and the negative voltage coefficient circuit 113. Correspondingly, the temperature coefficient circuit 114 can also be connected to the current source 111 and the oscillator 120. When the temperature of the oscillator 120 changes, the control circuit 110 can perform temperature compensation on the oscillator 120 based on the temperature coefficient circuit 114.

[0046] For example, if the oscillator 120 has a negative temperature characteristic and the temperature coefficient circuit 114 can have a positive temperature characteristic, this is equivalent to the oscillator 120 having a negative temperature coefficient and the temperature coefficient of the temperature coefficient circuit 114 having a positive temperature coefficient. When the temperature of the oscillator 120 increases, the control circuit 110 can utilize the positive temperature characteristic of the temperature coefficient circuit 114 to increase the bias voltage supplied to the current source 111, thereby increasing the current flowing from the current source 111 into the oscillator 120 and thereby increasing the current provided by the current source 111 to the oscillator 120. For example, when the temperature of the oscillator 120 increases, the control circuit 110 can utilize the positive temperature characteristic of the temperature coefficient circuit 114 to cause the increase in current of the current source 111 caused by the positive voltage coefficient circuit 112 to be greater than the decrease in current of the current source 111 caused by the negative voltage coefficient circuit 113, thereby increasing the current flowing from the current source 111 into the oscillator 120. When the current flowing from current source 111 into oscillator 120 increases, the corresponding current increase can offset the negative temperature characteristic of oscillator 120, thereby improving the temperature stability of oscillator 120. Accordingly, when the temperature of oscillator 120 decreases, control circuit 110 can utilize the positive temperature characteristic of temperature coefficient circuit 114 to reduce the bias voltage supplied to current source 111, thereby causing the current flowing from current source 111 into oscillator 120 to decrease, thereby reducing the current provided by current source 111 to oscillator 120. When the current flowing from current source 111 into oscillator 120 decreases, the corresponding current decrease can offset the negative temperature characteristic of oscillator 120, thereby improving the temperature stability of oscillator 120.

[0047] Under the action of the temperature coefficient circuit 114, the current source 111 can adjust the current provided to the oscillator 120 when the temperature of the oscillator 120 changes, thereby performing temperature compensation on the oscillator 120 to maintain the oscillation frequency of the oscillator 120 unchanged, which helps to improve the temperature stability of the oscillator 120. Accordingly, because the temperature coefficient circuit 114 is disposed outside the oscillator 120, if the oscillator 120 is designed according to low power consumption constraints, the temperature coefficient circuit 114 will not affect the operation of the oscillator 120, nor will it increase the internal load of the oscillator 120. Therefore, the temperature coefficient circuit 114 will not increase the power consumption of the oscillator 120, thereby improving the stability optimization effect of the digitally controlled oscillator circuit 100 while improving the convenience of power consumption control of the digitally controlled oscillator circuit 100.

[0048] In some embodiments, the control circuit 110 further includes a switch array 115, each switch in the switch array 115 is respectively connected to a current source 111 of the current source array, and the switch array 115 is connected to the oscillator 120; the switch is used to switch the current source 111 connected to the switch to an on state or an off state; the oscillation frequency of the oscillator 120 when the power supply voltage changes is related to the number of current sources 111 in the on state.

[0049] like Figure 2 As shown, the switch array 115 is connected to the current source array and the oscillator 120. When the current source 111 is used to power the oscillator 120, the switches of the switch array 115 can be used to control the on / off of each current source 111 to control the current flowing into the oscillator 120, thereby controlling the oscillation frequency of the digitally controlled oscillator 120. The switch array 115 includes multiple switches. Each switch in the switch array 115 is connected to a current source 111 in the current source array. Each switch in the switch array 115 is connected to the oscillator 120. Each switch in the switch array 115 can be used to switch the connected current source 111 between an on state and an off state. When the current source 111 is in the on state, the current source 111 can provide current to the oscillator 120. Correspondingly, when the current source 111 is in the off state, the current source 111 cannot provide current to the oscillator 120.

[0050] The oscillation frequency of the oscillator 120 may be related to the number of current sources 111 in the on-state. Accordingly, when the power supply voltage changes, the oscillation frequency of the oscillator 120 may be related to the number of current sources 111 in the on-state, so as to maintain the current provided by the current source array to the oscillator 120 unchanged, thereby improving the voltage stability of the oscillator 120.

[0051] For example, if the number of current sources 111 in the on-state remains unchanged, regardless of how the power supply voltage changes, the current source array still provides current to the oscillator 120 through the same number of current sources 111. Furthermore, the current increase and current decrease in each current source 111 in the current source array due to the change in the power supply voltage can offset each other, thereby maintaining the current provided by the current source array to the oscillator 120 unchanged, thereby improving the voltage stability of the oscillator 120.

[0052] Under the action of the switch array 115, the current source 111 can be switched between an on and off state by means of a switch, thereby facilitating the switching of the operating state of the current source 111. Accordingly, the switch array 115 can coordinate with the current source array, the positive voltage coefficient circuit 112, and the negative voltage coefficient circuit 113 to maintain the current provided by the current source array to the oscillator 120 constant when the power supply voltage changes, thereby facilitating the improvement of the voltage stability of the oscillator 120. Accordingly, since the switch array 115 is disposed outside the oscillator 120, if the oscillator 120 is designed with low power consumption constraints, the switch array 115 will not affect the operation of the oscillator 120, nor will it increase the internal load of the oscillator 120. Therefore, the switch array 115 will not increase the power consumption of the oscillator 120, thereby facilitating the optimization of the stability of the digitally controlled oscillator circuit 100 while improving the convenience of power consumption control of the digitally controlled oscillator circuit 100.

[0053] In some embodiments, the control circuit 110 further includes an enabling circuit connected to the current source 111; when the enabling electrical signal is at a low level, the enabling circuit keeps the current source 111 in an off state; when the enabling electrical signal is at a high level, the enabling circuit keeps the current source 111 in an on state.

[0054] For example, the control circuit 110 can determine the enable electrical signal of the enable circuit. When the enable circuit is connected to the current source 111, the enable circuit can control the current source 111 to be in an off state or an on state. For example, when the enable electrical signal is at a low level, the enable circuit can keep the current source 111 in an off state, thereby controlling the current source 111, the positive voltage coefficient circuit 112, and the negative voltage coefficient circuit 113 to be out of working state, and the current source 111 in the off state will not provide current to the oscillator 120. For another example, when the enable electrical signal is at a high level, the enable circuit can keep the current source 111 in an on state, thereby controlling the current source 111, the positive voltage coefficient circuit 112, and the negative voltage coefficient circuit 113 to be in working state, and the current source 111 in the on state can provide current to the oscillator 120.

[0055] Based on the setting of the enabling circuit, the operation of the current source 111 can be directly controlled by the enabling circuit, which is conducive to improving the convenience of controlling the current source 111.

[0056] In some embodiments, the current source 111 includes a first switching tube, the negative voltage coefficient circuit 113 includes a second switching tube, and the positive voltage coefficient circuit 112 includes a third switching tube; the control circuit 110 also includes a first resistor and a second resistor; the source of the first switching tube is used to connect to the power supply, the drain of the first switching tube is respectively connected to the gate of the second switching tube and the first end of the first resistor, the second end of the first resistor is respectively connected to the gate of the third switching tube and the first end of the second resistor, and the second end of the second resistor is connected to the gate of the first switching tube; the source of the second switching tube is connected to the source of the third switching tube, and the source of the second switching tube and the source of the third switching tube are also used to connect to the power supply; the drain of the second switching tube is respectively connected to the drain of the third switching tube and the oscillator 120.

[0057] like Figure 3 As shown, the control circuit 110 includes a switch tube M1, a switch tube M A , switch tube M B , resistor R1 and resistor R2. Switch tube M1, switch tube M A And the switch tube M B The source of the switch tube M1 is used to connect to the power supply VDD, and the drain of the switch tube M1 is respectively connected to the switch tube M A The gate of the resistor R1 and the first end of the resistor R1 are connected to the switch tube M B The gate of the switch tube M1 and the first end of the resistor R2 are connected, and the second end of the resistor R2 is connected to the gate of the switch tube M1. A The source of the switch tube M B The source of the switch tube M A The source and switch tube M B The source of the switch tube M is also used to connect the power supply VDD. A The drains are connected to the switch tube M B and the drain of the oscillator 120 .

[0058] Exemplarily, the current source 111 includes a switch tube M1 , which can serve as a first switch tube of the current source 111 .

[0059] The negative voltage coefficient circuit 113 includes a switch tube M A , resistor R1 and resistor R2. Switch tube M A It can be used as the second switch of the negative voltage coefficient circuit 113. The resistor R1 can be used as the first resistor. The resistor R2 can be used as the second resistor.

[0060] The positive voltage coefficient circuit 112 includes a switch tube M B And resistor R2. Switch tube M B It can serve as the third switch tube of the positive voltage coefficient circuit 112.

[0061] like Figure 3 As shown in FIG, when the power supply voltage increases, the current flowing through the resistor R1 and the resistor R2 increases. A The corresponding voltage change of the bias voltage V1 is ΔV1, and the switch tube M B For example, the voltage change of the corresponding bias voltage V2 is ΔV2. The voltage change ΔV1 can be related to the voltage drop added by resistors R1 and R2, and the voltage change ΔV2 can be related to the voltage drop added by resistor R2. If ΔV2 is less than the change in the power supply voltage and ΔV1 is greater than the change in the power supply voltage, then the switch tube M A With switch tube M B The overdrive voltage on the switch tube M has the opposite change. A The corresponding voltage change and the switch tube M B The corresponding voltage variation has the opposite variation trend. A With switch tube M B When the overdrive voltage on the switch tube M has an opposite change, A With switch tube M B By designing the transconductance of the oscillator 120 , the current provided by the switch tube M1 to the oscillator 120 can be kept constant, thereby improving the voltage stability of the oscillator 120 .

[0062] Correspondingly, when the voltage decreases, the current flowing through the resistor R1 and the resistor R2 decreases. A The corresponding voltage change of the bias voltage V1 is ΔV1, and the switch tube M B For example, the voltage change of the corresponding bias voltage V2 is ΔV2. The voltage change ΔV1 can be related to the voltage drop reduced by both resistors R1 and R2, and the voltage change ΔV2 can be related to the voltage drop reduced by resistor R2. If ΔV2 is less than the change in the power supply voltage and ΔV1 is greater than the change in the power supply voltage, then the switch tube M A With switch tube M B The overdrive voltage on the switch tube M has the opposite change. A The corresponding voltage change and the switch tube M B The corresponding voltage variation has the opposite variation trend. A With switch tube M B When the overdrive voltage on the switch tube M has an opposite change, A With switch tube M BBy designing the transconductance of the oscillator 120 , the current provided by the switch tube M1 to the oscillator 120 can be kept constant, thereby improving the voltage stability of the oscillator 120 .

[0063] In some embodiments, resistors with different temperature coefficients can be spliced together to form a resistor with a target temperature coefficient. For example, the first resistor can be formed by splicing resistors with different temperature coefficients. For example, multiple resistors are connected in parallel or in series to form the first resistor. The temperature coefficients of the different resistors required to form the first resistor can be different or the same, and are not limited here. The different resistors required to form the first resistor can jointly determine the resistance value of the first resistor and the temperature coefficient of the first resistor. Correspondingly, the second resistor can also be formed by splicing resistors with different temperature coefficients. For example, multiple resistors are connected in parallel or in series to form the second resistor. The temperature coefficients of the different resistors required to form the second resistor can be different or the same, and are not limited here. The different resistors required to form the second resistor can jointly determine the resistance value of the second resistor and the temperature coefficient of the second resistor.

[0064] The temperature coefficient corresponding to both the first resistor and the second resistor can match the temperature coefficient of the oscillator 120. Therefore, when the temperature of the oscillator 120 changes, the oscillator 120 can be temperature compensated using the first resistor and the second resistor, thereby improving the temperature stability of the oscillator 120. Accordingly, the first resistor and the second resistor can serve as the temperature coefficient circuit 114 of the control circuit 110 to perform temperature compensation on the oscillator 120 when the temperature of the oscillator 120 changes.

[0065] Exemplarily, the temperature coefficient circuit 114 may include a first resistor and a second resistor. The temperature coefficient corresponding to the first resistor and the second resistor matches the temperature coefficient of the oscillator 120. The temperature coefficients of the first resistor and the second resistor may be the same or different, and are not limited here. For example, when the oscillator 120 has a negative temperature coefficient, the temperature coefficient corresponding to the first resistor and the second resistor is a positive temperature coefficient. In this case, the resistance value corresponding to the first resistor and the second resistor increases as the temperature of the oscillator 120 increases. For another example, when the oscillator 120 has a positive temperature coefficient, the temperature coefficient corresponding to the first resistor and the second resistor is a negative temperature coefficient. In this case, the resistance value corresponding to the first resistor and the second resistor decreases as the temperature of the oscillator 120 increases.

[0066] For example, the oscillation frequency of the oscillator 120 decreases as the temperature of the oscillator 120 increases, and the resistance value corresponding to the first resistor and the second resistor increases as the temperature of the oscillator 120 increases; or, the oscillation frequency of the oscillator 120 increases as the temperature of the oscillator 120 increases, and the resistance value corresponding to the first resistor and the second resistor decreases as the temperature of the oscillator 120 increases.

[0067] When the temperature of the oscillator 120 changes, the current provided by the current source 111 to the oscillator 120 is adjusted by the resistance change corresponding to the first resistor and the second resistor, so as to compensate for the oscillation frequency change caused by the temperature change of the oscillator 120 by using the oscillation frequency change caused by the current change corresponding to the oscillator 120.

[0068] For example, Figure 3 As shown, the temperature coefficient circuit 114 includes a resistor R1 and a resistor R2. The first end of the resistor R1 is connected to the drain of the switch tube M1 and the drain of the switch tube M2. A The gate of the resistor R1 is connected to the switch tube M B and a first end of the resistor R2, and a second end of the resistor R2 is connected to the gate of the switch tube M1.

[0069] like Figure 3 As shown, the temperature coefficients of resistors R1 and R2 can be configured so that they match the temperature coefficient of oscillator 120. For example, when the temperature coefficient of oscillator 120 is negative, the temperature coefficient corresponding to resistors R1 and R2 is positive. For another example, when the temperature coefficient of oscillator 120 is positive, the temperature coefficient corresponding to resistors R1 and R2 is negative.

[0070] For example, the temperature coefficient of resistor R1 is zero, the temperature coefficient of resistor R2 is zero, and the temperature coefficient of the internal resistance of switch M2 is positive. When the temperature of oscillator 120 rises, if switch M2 is in the on state, the internal resistance of switch M2 increases, and the voltage divided by the internal resistance of switch M2 increases. Accordingly, the gate voltage of switch M1 increases, the current flowing through resistors R1 and R2 decreases, and the bias voltage V1 and bias voltage V2 also decrease. Switch M2 A And the switch tube M BThe current introduced into the switch tube M1 increases. In an exemplary embodiment, since the internal resistance of the switch tube M2 increases and the current flowing through the switch tube M2 decreases, the bias voltage V2 may increase or decrease. The relationship between the transconductance of the switch tube M1 and the internal resistance of the switch tube M2 can be designed to increase or decrease the bias voltage V2, which is not limited here.

[0071] Exemplarily, the temperature coefficients of the resistors R1 and R2 are not zero temperature coefficients.

[0072] In the case that the temperature coefficients of the resistors R1 and R2 are both greater than the temperature coefficient of the internal resistance of the switch tube M2, as the temperature of the oscillator 120 increases, the bias voltage V1 and the bias voltage V2 increase, and the switch tube M2 A And the switch tube M B The current introduced into the switch tube M1 decreases.

[0073] In the case that the temperature coefficients of the resistors R1 and R2 are both smaller than the temperature coefficient of the internal resistance of the switch tube M2, as the temperature of the oscillator 120 increases, the bias voltage V1 and the bias voltage V2 decrease, and the switch tube M2 A And the switch tube M B The current introduced into the switch tube M1 increases.

[0074] When the temperature coefficient of the resistor R1 is greater than the temperature coefficient of the internal resistance of the switch tube M2, and the temperature coefficient of the resistor R2 is less than the temperature coefficient of the internal resistance of the switch tube M2, as the temperature of the oscillator 120 increases, the bias voltage V1 increases and the bias voltage V2 decreases, then the switch tube M2 A The current introduced into the switch tube M1 decreases, and the switch tube M B The current introduced into the switch tube M1 increases.

[0075] Accordingly, when the temperature coefficient of the resistor R1 is smaller than the temperature coefficient of the internal resistance of the switch tube M2, and the temperature coefficient of the resistor R2 is larger than the temperature coefficient of the internal resistance of the switch tube M2, as the temperature of the oscillator 120 increases, the bias voltage V1 decreases and the bias voltage V2 increases, then the switch tube M2 A The current introduced into the switch tube M1 increases, and the switch tube M B The current introduced into the switch tube M1 decreases.

[0076] Based on this, when the temperature coefficients of the resistors R1 and R2 match the temperature coefficient of the oscillator 120, the resistances of the resistors R1 and R2 can change in response to the temperature change of the oscillator 120, thereby causing the switch tube M to A And the switch tube M BBy introducing a change in the current magnitude of the switch tube M1, the magnitude of the current supplied to the oscillator 120 is adjusted to achieve temperature compensation for the oscillator 120. Accordingly, when the temperature change of the oscillator 120 can cause a change in the oscillation frequency of the oscillator 120, such as when the oscillation frequency change caused by the temperature change of the oscillator 120 is not zero, the resistors R1 and R2 can cooperate with the switch tube M1 to form a power supply with a positive temperature coefficient or a power supply with a negative temperature coefficient to perform temperature compensation for the oscillator 120. For another example, when the temperature change of the oscillator 120 is small and does not cause a change in the oscillation frequency of the oscillator 120, the resistors R1 and R2 can cooperate with the switch tube M1 to form a power supply with a zero temperature coefficient.

[0077] In the case where the temperature coefficient of the oscillator 120 is a negative temperature coefficient, if the temperature of the oscillator 120 changes, such as the temperature rises, then if the temperature coefficients of the resistors R1 and R2 match the temperature coefficient of the oscillator 120, the temperature coefficient corresponding to the resistors R1 and R2 is a positive temperature coefficient, and the resistance corresponding to the resistors R1 and R2 increases as the temperature of the oscillator 120 rises. The change in the resistance of the resistors R1 and R2 can make the switch M A And the switch tube M B The total current of the switch tube M1 is increased, so that the oscillation frequency variation caused by the current variation of the oscillator 120 is used to compensate the oscillation frequency variation caused by the temperature variation of the oscillator 120 , thereby improving the temperature stability of the oscillator 120 .

[0078] Exemplarily, the temperature coefficient circuit 114 may further include a third resistor. The first end of the third resistor is respectively connected to the second end of the second resistor and the gate of the first switching tube, and the second end of the third resistor is connected to the drain of the fourth switching tube. The temperature coefficient corresponding to the first resistor, the second resistor, and the third resistor matches the temperature coefficient of the oscillator 120. The temperature coefficients of the first resistor, the second resistor, and the third resistor may be the same or different, and are not limited here. For example, when the oscillator 120 has a negative temperature coefficient, the temperature coefficient corresponding to the first resistor, the second resistor, and the third resistor is a positive temperature coefficient. In this case, the resistance corresponding to the first resistor, the second resistor, and the third resistor increases as the temperature of the oscillator 120 increases. For another example, when the oscillator 120 has a positive temperature coefficient, the temperature coefficient corresponding to the first resistor, the second resistor, and the third resistor is a negative temperature coefficient. In this case, the resistance corresponding to the first resistor, the second resistor, and the third resistor decreases as the temperature of the oscillator 120 increases.

[0079] When the temperature of the oscillator 120 changes, the current provided by the current source 111 to the oscillator 120 is adjusted by the resistance change corresponding to the first resistor, the second resistor and the third resistor, so as to compensate for the oscillation frequency change caused by the temperature change of the oscillator 120 by the oscillation frequency change caused by the current change corresponding to the oscillator 120.

[0080] For example, the third resistor includes a resistor R3. Figure 3 As shown, a resistor R3 may be further provided between the second end of the resistor R2 and the drain of the switch tube M2, so that the temperature coefficient of the resistor R3 can be used to assist in designing the temperature coefficients of the resistors R1 and R2. Furthermore, the temperature coefficients corresponding to the resistors R1, R2, and R3 can be used to perform temperature compensation on the oscillator 120. When the oscillator 120 is temperature compensated, the temperature stability of the oscillator 120 can be improved.

[0081] In some embodiments, the enabling circuit of the control circuit 110 includes at least one of a fourth switching tube and a fifth switching tube; the drain of the fourth switching tube is respectively connected to the gate of the first switching tube and the second end of the second resistor, the source of the fourth switching tube is grounded, and the fourth switching tube is in an off state when the enabling electrical signal received by the gate of the fourth switching tube is at a low level; the source of the fifth switching tube is used to connect to a power supply, the drain of the fifth switching tube is respectively connected to the gate of the first switching tube, the drain of the fourth switching tube and the second end of the second resistor, and the fifth switching tube is in an off state when the enabling electrical signal received by the gate of the fifth switching tube is at a low level.

[0082] like Figure 3 As shown, the fourth switch tube includes a switch tube M2. The switch tube M2 may include a P-channel MOS tube (PMOS). The drain of the switch tube M2 is connected to the gate of the switch tube M1 and the second end of the resistor R2, the source of the switch tube M2 is grounded, and the gate of the switch tube M2 is used to receive the enable electrical signal V off . The enable signal V off When the switch tube M2 is in the off state, the switch tube M1 and the switch tube M2 are in the off state. A And the switch tube M B Based on this, the setting of the fourth switch tube is conducive to improving the convenience of controlling the working state of the control circuit 110, and further conducive to improving the convenience of controlling the current size provided by the current source 111 to the oscillator 120.

[0083] like Figure 3As shown, the fifth switch tube includes a switch tube M3. The switch tube M3 may include an NMOS. The source of the switch tube M3 is used to connect to the power supply, the drain of the switch tube M3 is respectively connected to the gate of the switch tube M1, the drain of the switch tube M2 and the second end of the resistor R2, and the gate of the switch tube M3 is used to receive the enable electrical signal V off , when the enable signal V off When the switch tube M3 is in the off state, the switch tube M3 is equivalent to disconnecting the power supply VDD from the switch tubes M1 and M2. A And the switch tube M B The connection relationship between the switch tube M3 and the control circuit 110 is such that the switch tube M3 can accelerate the shutdown of the control circuit 110. Based on this, the provision of the fifth switch tube is conducive to improving the convenience of controlling the working state of the control circuit 110, while also improving the switching efficiency of the working state of the control circuit 110, thereby improving the convenience of controlling the current provided by the current source 111 to the oscillator 120.

[0084] In some embodiments, the switch array 115 of the control circuit 110 includes a plurality of switches. The switches include a sixth switch transistor. The source of the sixth switch transistor is connected to the drain of the second switch transistor and the drain of the third switch transistor, respectively. The drain of the sixth switch transistor is connected to the oscillator 120. The sixth switch transistor is used to switch the current source 111 connected to the switch into an on state or an off state.

[0085] like Figure 3 As shown, the sixth switch tube includes a switch tube M C . Switching tube M A It can include NMOS. Switch tube M A The source of each switch is connected to the switch tube M A The drain and switch tube M B The drain of the switch tube M A The drain of the switch tube M is connected to the oscillator 120. A The gate receives a bias voltage V C [n] Switching switch tube M C In the on state or off state. For example, at the bias voltage V C When [n] is less than the bias voltage threshold, the switch tube M C In the disconnected state. For example, when the bias voltage V C When [n] is greater than or equal to the bias voltage threshold, the switch tube M C In the on state.

[0086] In the switch tube M C When in the on state, the switch tube M1 and the switch tube M A And the switch tube M BIf the control circuit 110 can operate normally, the current provided to the oscillator 120 can be kept constant when the power supply voltage changes. Accordingly, the resistors R1 and R2 can also operate normally, and the control circuit 110 can adjust the current provided to the oscillator 120 when the temperature of the oscillator 120 changes.

[0087] In the switch tube M C When in the off state, the switch tube M1 and the switch tube M A And the switch tube M B No current can be supplied to the oscillator 120. At this point, it can be determined that the control circuit 110 is turned off.

[0088] Based on this, the provision of the sixth switch tube is conducive to improving the convenience of controlling the working state of the control circuit 110 , and further conducive to improving the convenience of controlling the current provided by the current source 111 to the oscillator 120 .

[0089] In some embodiments, the oscillator 120 includes an oscillator outer loop 121 and a feedforward loop 122 ; the oscillator outer loop 121 includes an even number of first inverters; and the feedforward loop 122 is disposed between every two adjacent even-numbered nodes of the oscillator outer loop 121 .

[0090] For example, the oscillator 120 may include a ring oscillator. The ring oscillator may be a power-optimized differential phase ring oscillator, so that the oscillator 120 can be designed according to low power consumption constraints.

[0091] For example, the oscillator 120 includes an even number of first inverters. A node may be provided between every two adjacent first inverters. Every two adjacent even-numbered nodes may be collectively referred to as the nth node and the n+2th node, where n is an even number. For the oscillator outer loop 121 of the oscillator 120, the order of the even-numbered nodes may be determined in a clockwise direction. For example, when determining the nth node, the second node in the clockwise direction corresponding to the nth node may be determined as the n+2th node.

[0092] Take the oscillator 120 as an eight-stage ring oscillator as an example. Figure 4 as well as Figure 5 As shown, when n=2, n+2=4, and a feedforward loop 122 is provided between the second and fourth nodes of the eight-stage ring oscillator. Correspondingly, when n=4, n+2=6, and a feedforward loop 122 is provided between the fourth and sixth nodes of the eight-stage ring oscillator. When n=8, n+2=10. Since 10 exceeds the total number of stages, n+2 can be determined to represent the second node. And so on.

[0093] For example, the first inverter includes a first PMOS and a first NMOS; the feedforward loop 122 includes any one of the following: the feedforward loop 122 includes a second inverter, the input end of the second inverter is connected to the first even-numbered node of the oscillator outer loop 121, the output end of the second inverter is connected to the second even-numbered node of the oscillator outer loop 121, and the size of the second inverter is smaller than the size of the first inverter; the feedforward loop 122 includes a second PMOS, the gate of the second PMOS is connected to the first even-numbered node of the oscillator outer loop 121, and the drain of the second PMOS is connected to the oscillator 120 and the second even-numbered node of the oscillator outer loop 121. , the source of the second PMOS is used to connect to the power supply, and the size of the first NMOS in the first inverter is larger than the size of the first PMOS; the feedforward loop 122 includes a second NMOS, the gate of the second NMOS is connected to the first even node of the oscillator outer loop 121, the drain of the second NMOS is connected to the second even node of the oscillator outer loop 121, the source of the second NMOS is grounded, and the size of the first PMOS in the first inverter is larger than the size of the first NMOS, wherein the first even node and the second even node are adjacent even nodes, and the node ordinal number corresponding to the first even node is larger than the node ordinal number corresponding to the second even node.

[0094] For example, if the second even-numbered node is the nth node, the first even-numbered node can be the n+2th node, where n is an even number. And so on.

[0095] like Figure 4 As shown, when the feedforward loop 122 includes a second inverter, the size of the second inverter in the feedforward loop 122 is smaller than the size of the first inverter in the oscillator outer loop 121 , which is beneficial to promoting the optimization of power consumption of the oscillator 120 .

[0096] like Figure 5 As shown, in the case where the feed-forward loop 122 includes the second PMOS, the duty cycle requirement can be met by constraining the size of the first NMOS in the first inverter to be larger than the size of the first PMOS.

[0097] like Figure 5 As shown, in the case where the feed-forward loop 122 includes the second NMOS, the duty cycle requirement can be met by constraining the size of the first PMOS in the first inverter to be larger than the size of the first NMOS.

[0098] Based on the configuration of the oscillator outer loop 121 and the feedforward loop 122 in the oscillator 120 , the power consumption of the oscillator 120 can be optimized, which is beneficial to reducing the power consumption of the oscillator 120 .

[0099] The oscillator 120 can establish a connection relationship with the control circuit 110. Then, when the control circuit 110 is connected to a power supply and the power supply voltage of the power supply changes, the current provided to the oscillator 120 can be kept unchanged, and / or, when the temperature of the oscillator 120 changes, the control circuit 110 adjusts the current provided to the oscillator 120 to perform temperature compensation for the oscillator 120.

[0100] Accordingly, the digitally controlled oscillator circuit 100 utilizes the control circuit 110 to assist the oscillator 120, thereby ensuring the voltage and temperature stability of the oscillator 120. Furthermore, the introduction of a negative feedback loop formed by an operational amplifier within the oscillator 120 is avoided, which helps reduce the power consumption introduced by bandwidth constraints during the design of the oscillator 120. This allows the digitally controlled oscillator circuit 100 to maintain high voltage and temperature stability while maintaining low power consumption.

[0101] The digitally controlled oscillator 120 can perform power consumption optimization design on the oscillator 120 independently, without performing stability optimization design on the oscillator 120 inside the oscillator 120. The stability optimization design is also integrated into the design of the control circuit 110, so that the oscillator 120 can be voltage compensated and temperature compensated through the control circuit 110. The control circuit 110 does not introduce a negative feedback loop including an operational amplifier. For example, the current source 111, the positive voltage coefficient circuit 112, the negative voltage coefficient circuit 113, and the temperature coefficient circuit 114 included in the control circuit 110 do not introduce an operational amplifier negative feedback loop, which helps to avoid the increase in power consumption caused by the design constraint relationship between the loop bandwidth and the bandwidth of the outer phase-locked loop. Based on this, based on the configuration of the control circuit 110 and the oscillator 120 in the digitally controlled oscillator 120, it is beneficial to improve the stability optimization effect of the digitally controlled oscillator circuit 100 while improving the convenience of power consumption control of the digitally controlled oscillator circuit 100.

[0102] The digitally controlled oscillator circuit 100 provided in an embodiment of the present application includes a control circuit 110 and an oscillator 120. The control circuit 110 is connected to the oscillator 120 and is used to connect to a power supply. When the control circuit 110 is connected to the power supply and the power supply voltage changes, the control circuit 110 maintains the current provided to the oscillator 120 unchanged, and / or, when the temperature of the oscillator 120 changes, the control circuit 110 adjusts the current provided to the oscillator 120 to perform temperature compensation for the oscillator 120.

[0103] Since the magnitude of the current provided by the control circuit 110 to the oscillator 120 remains unchanged when the power supply voltage of the power supply changes, the voltage of the oscillator 120 can be kept unchanged, thereby improving the voltage stability of the oscillator 120. Since the control circuit 110 adjusts the magnitude of the current provided to the oscillator 120 when the temperature changes, the oscillator 120 can be temperature compensated to reduce the adverse effects of the temperature change of the oscillator 120 on the oscillation frequency of the oscillator 120, thereby improving the temperature stability of the oscillator 120. Based on this, while the voltage stability and temperature stability of the oscillator 120 are improved, the stability of the digitally controlled oscillation circuit 100 can be optimized, which is conducive to improving the convenience of stability optimization of the digitally controlled oscillation circuit 100. Accordingly, based on the design of the control circuit 110 in the digitally controlled oscillation circuit 100, the voltage stability of the oscillator 120 can be optimized while optimizing the temperature stability of the oscillator 120, which is conducive to improving the stability optimization effect of the digitally controlled oscillation circuit 100.

[0104] Furthermore, because the control circuit 110 is disposed outside the oscillator 120, if the oscillator 120 is designed to be low-power-constrained, the control circuit 110 will not affect the operation of the oscillator 120, nor will it add any additional load to the internal portion of the oscillator 120. Consequently, the control circuit 110 will not increase the power consumption of the oscillator 120. Consequently, while the voltage and temperature stability of the oscillator 120 are improved, the control circuit 110 will not increase the power consumption of the oscillator 120. This facilitates both optimizing the stability of the digitally controlled oscillator circuit 100 and enhancing the convenience of controlling the power consumption of the digitally controlled oscillator circuit 100.

[0105] See also Figure 6 , Figure 6 A schematic structural diagram of a phase-locked loop 10 provided in an embodiment of the present application.

[0106] like Figure 6 As shown, the phase-locked loop 10 includes the aforementioned digitally controlled oscillator circuit 100 .

[0107] The relevant description of the digital controlled oscillation circuit 100 in the phase-locked loop 10 may refer to the relevant description of the digital controlled oscillation circuit 100 mentioned above, which will not be repeated here.

[0108] When the stability optimization effect and the convenience of power consumption control of the digitally controlled oscillator circuit 100 are improved, it is beneficial to improve the stability optimization effect and the convenience of power consumption control of the phase-locked loop 10 .

[0109] The phase-locked loop 10 can be installed on the computing chip to optimize the energy efficiency of the computing chip to improve the energy efficiency of the computing chip. The phase-locked loop 10 can provide a stable clock signal for the computing chip and is the basic module for timing control in computing chips and data processing equipment.

[0110] An embodiment of the present application further provides a computing power chip, which includes the aforementioned phase-locked loop 10.

[0111] For the description of the phase-locked loop 10 in the computing power chip, reference may be made to the description of the phase-locked loop 10 and the digitally controlled oscillator circuit 100 described above.

[0112] Computing chips can be installed on data processing equipment. Computing chips are the core components of data processing equipment and directly determine computing efficiency and task processing capabilities.

[0113] When the stability optimization effect and power consumption control convenience of the phase-locked loop 10 are improved, it is beneficial to improve the stability optimization effect and power consumption control convenience of the computing power chip, and further help improve the energy efficiency ratio of the computing power chip.

[0114] An embodiment of the present application also provides a data processing device, which includes the aforementioned computing power chip.

[0115] For the description of the computing power chip in the data processing device, reference can be made to the description of the computing power chip, the phase-locked loop 10 and the digitally controlled oscillation circuit 100 described above.

[0116] Data processing equipment is the carrier of computing power chips, and realizes complex data tasks through system-level integration.

[0117] When the energy efficiency of computing chips is improved, it will be beneficial to improve the data processing efficiency of data processing equipment.

[0118] It should be understood that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the present application.

[0119] It will also be understood that the term "and / or" as used in this application and the appended claims refers to and includes any and all possible combinations of one or more of the associated listed items.

[0120] The above are only specific embodiments of the present application, but the scope of protection of the present application is not limited thereto. Any person skilled in the art can easily conceive of various equivalent modifications or substitutions within the technical scope disclosed in this application, and such modifications or substitutions should be included in the scope of protection of this application. Therefore, the scope of protection of this application should be based on the scope of protection of the claims.

Claims

1. A digitally controlled oscillator circuit, characterized in that: The digitally controlled oscillation circuit includes a control circuit and an oscillator, wherein the control circuit is connected to the oscillator and is used to connect to a power supply; The control circuit maintains the magnitude of the current provided to the oscillator unchanged when the control circuit is connected to a power supply and the power supply voltage of the power supply changes, and / or the control circuit adjusts the magnitude of the current provided to the oscillator when the temperature of the oscillator changes to perform temperature compensation on the oscillator.

2. The digitally controlled oscillator circuit according to claim 1, wherein: The control circuit includes a current source, a positive voltage coefficient circuit, and a negative voltage coefficient circuit, the current source is connected to the oscillator and is used to connect to a power supply, and the positive voltage coefficient circuit and the negative voltage coefficient circuit are connected to the current source; When the power supply voltage provided by the current source changes, the voltage change corresponding to the positive voltage coefficient circuit and the voltage change corresponding to the negative voltage coefficient circuit have opposite change trends, so as to keep the current provided by the current source to the oscillator unchanged according to the voltage change corresponding to the positive voltage coefficient circuit and the voltage change corresponding to the negative voltage coefficient circuit.

3. The digitally controlled oscillator circuit according to claim 2, wherein: The control circuit further includes a temperature coefficient circuit, wherein the temperature coefficient circuit is connected to the positive voltage coefficient circuit and the negative voltage coefficient circuit; The temperature coefficient circuit increases the magnitude of the current provided by the current source to the oscillator when the temperature of the oscillator increases, and decreases the magnitude of the current provided by the current source to the oscillator when the temperature of the oscillator decreases.

4. The digitally controlled oscillator circuit according to claim 2, wherein: The control circuit further comprises a switch array, each switch in the switch array is respectively connected to a current source of the current source array, and the switch array is connected to the oscillator; The switch is used to switch the current source connected to the switch to an on state or an off state; The oscillation frequency of the oscillator when the power supply voltage changes is related to the number of the current sources in the on state.

5. The digitally controlled oscillator circuit according to claim 2, wherein: The control circuit further includes an enabling circuit, wherein the enabling circuit is connected to the current source; The enabling circuit keeps the current source in an off state when the enabling electrical signal is at a low level; The enabling circuit keeps the current source in an on state when the enabling electrical signal is at a high level.

6. The digitally controlled oscillation circuit according to any one of claims 2 to 5, characterized in that: The current source includes a first switch tube, the negative voltage coefficient circuit includes a second switch tube, and the positive voltage coefficient circuit includes a third switch tube; the control circuit also includes a first resistor and a second resistor; The source of the first switching transistor is used to connect to a power supply, the drain of the first switching transistor is respectively connected to the gate of the second switching transistor and the first end of the first resistor, the second end of the first resistor is respectively connected to the gate of the third switching transistor and the first end of the second resistor, and the second end of the second resistor is connected to the gate of the first switching transistor; The source of the second switching tube is connected to the source of the third switching tube, and the source of the second switching tube and the source of the third switching tube are also used to connect to a power supply; The drain of the second switch tube is connected to the drain of the third switch tube and the oscillator respectively.

7. The digitally controlled oscillator circuit according to claim 6, wherein: The oscillation frequency of the oscillator decreases as the temperature of the oscillator increases, and the resistance value corresponding to the first resistor and the second resistor increases as the temperature of the oscillator increases; or the oscillation frequency of the oscillator increases as the temperature of the oscillator increases, and the resistance value corresponding to the first resistor and the second resistor decreases as the temperature of the oscillator increases; When the temperature of the oscillator changes, the current provided by the current source to the oscillator is adjusted by the resistance change corresponding to the first resistor and the second resistor, so as to compensate for the oscillation frequency change caused by the temperature change of the oscillator by the oscillation frequency change caused by the current change corresponding to the oscillator.

8. The digitally controlled oscillator circuit according to claim 6, wherein: The enabling circuit of the control circuit includes at least one of a fourth switching tube and a fifth switching tube; The drain of the fourth switch tube is connected to the gate of the first switch tube and the second end of the second resistor respectively, the source of the fourth switch tube is grounded, and the fourth switch tube is in an off state when the enable electrical signal received by the gate of the fourth switch tube is a low level; The source of the fifth switching tube is used to connect to a power supply, the drain of the fifth switching tube is respectively connected to the gate of the first switching tube, the drain of the fourth switching tube and the second end of the second resistor, and the fifth switching tube is in a disconnected state when the enable electrical signal received by the gate of the fifth switching tube is at a low level.

9. The digitally controlled oscillator circuit according to claim 1, wherein: The oscillator includes an oscillator outer loop and a feedforward loop; The outer loop of the oscillator includes an even number of first inverters; The feedforward loop is arranged between every two adjacent even-numbered nodes of the outer loop of the oscillator.

10. The digitally controlled oscillator circuit according to claim 9, wherein: The first inverter includes a first PMOS and a first NMOS; The feedforward loop includes any of the following: The feedforward loop includes a second inverter, an input end of the second inverter is connected to a first even-numbered node of the outer loop of the oscillator, an output end of the second inverter is connected to a second even-numbered node of the outer loop of the oscillator, and a size of the second inverter is smaller than that of the first inverter; The feedforward loop includes a second PMOS, a gate of the second PMOS is connected to a first even-numbered node of the oscillator outer loop, a drain of the second PMOS is connected to a second even-numbered node of the oscillator outer loop, a source of the second PMOS is used to connect to a power supply, and a size of the first NMOS in the first inverter is larger than that of the first PMOS; The feed-forward loop includes a second NMOS, a gate of the second NMOS is connected to a first even-numbered node of the oscillator outer loop, a drain of the second NMOS is connected to a second even-numbered node of the oscillator outer loop, a source of the second NMOS is grounded, and a size of the first PMOS in the first inverter is larger than that of the first NMOS; The first even-numbered node and the second even-numbered node are adjacent even-numbered nodes, and the node ordinal number corresponding to the first even-numbered node is greater than the node ordinal number corresponding to the second even-numbered node.

11. A phase-locked loop, characterized in that: The phase-locked loop includes the digitally controlled oscillation circuit according to any one of claims 1 to 10.

12. A computing power chip, characterized in that: The computing power chip includes the phase-locked loop as claimed in claim 11.

13. A data processing device, characterized in that: The data processing device includes the computing power chip as described in claim 12.

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