Radio frequency front-end module

Abstract

The utility model relates to the technical field of wireless communication, and provides a radio frequency front-end module, which comprises a substrate, and a first chip, a second chip and a third chip which are arranged on the substrate, a power amplification circuit and a first control unit are arranged on the first chip, the first control unit is used for receiving an external logic control signal to control the power amplification circuit to be switched on or switched off, and the power amplification circuit is used for amplifying a transmitted radio frequency signal; a first voltage conversion circuit is arranged on the second chip and is used for converting the voltage of the power supply into a preset voltage and outputting the preset voltage to the first chip to realize power supply; a control module and a second control unit are arranged on the third chip; the control module is used for processing an amplified signal output by the power amplification circuit and outputting a corresponding control signal to realize switching; and the second control unit is used for switching on or switching off the control module. The radio frequency front-end module can improve isolation and reliability of the enhanced circuit.

Description

TECHNICAL FIELD

[0001] The utility model relates to wireless communication technical field especially relates to a radio frequency front end module. BACKGROUND

[0002] In wireless communication and WIFI etc. TDD system (time division duplex system), TDD system is a duplex mode of communication system, for separating receiving and transmitting channel. TDD mode carries out receiving and transmitting through the different time slots of same frequency channel to ensure the separation in time. TDD system often needs to use radio frequency front end module (FEM). The radio frequency front end module is generally composed of radio frequency switch, radio frequency power amplifier (PA), low noise amplifier (LNA) etc. circuit. Radio frequency switch switches radio frequency path according to the receiving / transmitting time sequence control signal;Radio frequency power amplifier is used for amplifying transmitting signal;Low noise amplifier is used for amplifying receiving weak signal.

[0003] Because in actual circuit work, when the module works in transmitting state, power amplifier opens, and radio frequency switch connects power amplifier output end. But considering the actual situation, radio frequency switch is not ideal device. At this time, although radio frequency switch receiving end is in cutoff state, still part of signal will leak from transmitting end or antenna end to receiving bypass end and LNA input end. The leakage signal will leak to receiving end through receiving bypass circuit or LNA circuit in off state. Transmitter leakage signal returns to transceiver chip interior through receiving port, and can possibly interfere with the normal work of transceiver chip. Similarly, in module receiving state, receiving signal of antenna also can leak to transmitting end through off power amplifier circuit, and then interfere with the normal work of transceiver chip, so that radio frequency signal transmitting and receiving control effect of radio frequency front end module is poor, and reliability is poor. UTILITY MODEL CONTENTS

[0004] The utility model embodiment provides a radio frequency front end module to solve the problems of poor radio frequency signal transmitting and receiving control effect and poor reliability of the existing radio frequency front end module.

[0005] The utility model embodiment provides a radio frequency front end module, which comprises a substrate, a first chip, a second chip and a third chip arranged on the substrate.

[0006] The first chip is provided with a power amplification circuit and a first control unit, the first control unit is used for receiving an external logic control signal to control the power amplification circuit to be turned on or turned off, and the power amplification circuit is used for amplifying and processing a radio frequency signal.

[0007] The second chip is provided with a first voltage conversion circuit, which is used for converting the voltage of a power supply into a preset voltage and then outputting the preset voltage to the first chip to realize power supply.

[0008] The third chip is provided with a control module and a second control unit, the control module is used for processing an amplified signal output by the power amplification circuit and outputting a corresponding control signal to realize switching; the second control unit is used for turning on or turning off the control module;

[0009] The first input end of the power amplification circuit is used for connecting to a signal sending end and the first control unit, the power amplification circuit is used for amplifying the input radio frequency signal; the output end of the power amplification circuit is connected to the first input end of the control module;

[0010] The output end of the control module is used for controlling switching of different radio frequency signals to a signal receiving end;

[0011] The input end of the first voltage conversion circuit is used for connecting to a power supply, the output end of the first voltage conversion circuit is connected to the second input end of the power amplification circuit, the first voltage conversion circuit is used for converting a voltage of the power supply into a working voltage and outputting to the power amplification circuit; the second input end of the control module is connected to the power supply, and the control end of the control module is used for connecting to an antenna end.

[0012] Preferably, the first control unit comprises a first switch and a first capacitor, the control end of the first switch is connected to ground through the first capacitor in series, and the output end of the first switch is connected to the first input end of the power amplification circuit;

[0013] The second control unit comprises a second switch and a second capacitor, the control end of the second switch is connected to ground through the second capacitor in series, and the output end of the second switch is connected to the output end of the control module;

[0014] When the radio frequency front-end module works in a receiving mode, the first switch is turned on, and the second switch is turned off; when the radio frequency front-end module works in a sending mode, the first switch is turned off, and the second switch is turned on.

[0015] Preferably, the first control unit further comprises a first inductor, the first end of the first inductor is connected to the control end of the first switch, and the second end of the first inductor is connected to ground through the first capacitor in series;

[0016] The second control unit further comprises a second inductor, the first end of the second inductor is connected to the control end of the second switch, and the second end of the second inductor is connected to ground through the second capacitor in series.

[0017] Preferably, the first control unit further comprises a third switch, control ends of the third switch being connected to a first input end of the power amplification circuit and an output end of the first switch respectively, and an output end of the third switch being connected to the signal transmitting end;

[0018] The second control unit further comprises a fourth switch, a control end of the fourth switch being connected to the signal receiving end, and output ends of the fourth switch being connected to output ends of the control module and the second switch respectively.

[0019] Preferably, the first control unit comprises a fifth switch, a control end of the fifth switch being connected to the first input end of the power amplification circuit, and an output end of the fifth switch being connected to the signal transmitting end;

[0020] The second control unit comprises a sixth switch, a control end of the sixth switch being connected to the signal receiving end, and an output end of the sixth switch being connected to the output end of the control module.

[0021] Preferably, the control module comprises a switching circuit, a second voltage conversion circuit and a switch control circuit;

[0022] An input end of the switch control circuit is used for being connected to an external logic control circuit, an output end of the switch control circuit is used for outputting a control signal of the external logic control circuit to the switching circuit, so as to realize a switching function of the switching circuit; a first input end of the switching circuit serves as a first input end of the control module, an input end of the second voltage conversion circuit serves as a second input end of the control module, and an output end of the second voltage conversion circuit is connected to a second input end of the switching circuit; an output end of the switching circuit serves as an output end of the control module, and a control end of the switching circuit is used for being connected to the antenna end.

[0023] Preferably, the switching circuit comprises a first radio frequency switch and a first low noise amplifier;

[0024] The output end of the switch control circuit is used for controlling the first radio frequency switch to work; a control end of the first radio frequency switch serves as the control end of the switching circuit, a first output end of the first radio frequency switch serves as the first input end of the switching circuit, a second output end of the first radio frequency switch is connected to an input end of the first low noise amplifier, an output end of the first low noise amplifier also serves as the output end of the switching circuit, and a third output end of the first radio frequency switch is connected to the output end of the first low noise amplifier.

[0025] Preferably, the switching circuit comprises a second radio frequency switch, a second low noise amplifier and a seventh switch;

[0026] The output end of the switch control circuit is used for controlling the operation of the second radio frequency switch; the control end of the second radio frequency switch is used as the control end of the switch circuit, the first output end of the second radio frequency switch is used as the first input end of the switch circuit, the second output end of the second radio frequency switch is connected to the input end of the second low noise amplifier, the input end of the second low noise amplifier is also used as the second input end of the switch circuit and is connected to the output end of the second voltage conversion circuit; the control end of the seventh switch is connected to the input end of the second low noise amplifier, and the output end of the seventh switch is connected to the output end of the second low noise amplifier.

[0027] Preferably, the power amplification circuit comprises a first matching circuit, a second matching circuit, a sending end bias circuit and a power amplifier.

[0028] The input end of the first matching circuit is used as the first input end of the power amplification circuit, the input end of the sending end bias circuit is used as the second input end of the power amplification circuit, the output end of the first matching circuit and the output end of the sending end bias circuit are respectively connected to the input end of the power amplifier, the output end of the power amplifier is connected to the input end of the second matching circuit, and the output end of the second matching circuit is used as the output end of the power amplification circuit; the input end of the power amplifier is also used for connecting a power supply voltage.

[0029] Preferably, the first chip, the second chip and the third chip are fixedly connected to the substrate by means of silver paste or solder ball welding.

[0030] Compared with the prior art, the radio frequency front end module in the utility model, through the first chip, the second chip and the third chip are arranged on the substrate, the power amplification circuit and the first control unit are arranged on the first chip, the first control unit is used for receiving external logic control signals to control the power amplification circuit to be turned on or turned off, and the power amplification circuit is used for amplifying and processing the transmitted radio frequency signals; the first voltage conversion circuit is arranged on the second chip and is used for converting the voltage of the power supply into a preset voltage and then outputting the preset voltage to the first chip to realize power supply; the control module and the second control unit are arranged on the third chip, the control module is used for processing the amplified signals output by the power amplification circuit and outputting corresponding control signals to realize switch switching; the second control unit is used for turning on or turning off the control module; the first control unit and the second control unit are used for controlling the turning on or turning off of the power amplification circuit and the control module respectively, so that the switching of the receiving mode and the sending mode is realized, the signal leakage is reduced, the isolation degree of the circuit is enhanced, the implementation complexity of the transmission power control is effectively reduced, the radiation and the energy consumption are reduced, and the service life of the product is prolonged. BRIEF DESCRIPTION OF DRAWINGS

[0031] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0032] Figure 1 This is a circuit diagram of the radio frequency front-end module provided in Embodiment 1 of this utility model;

[0033] Figure 2 This is a circuit diagram of the radio frequency front-end module provided in Embodiment 2 of this utility model;

[0034] Figure 3 This is a circuit diagram of the radio frequency front-end module provided in Embodiment 3 of this utility model.

[0035] Figure 4 This is a circuit diagram of the radio frequency front-end module provided in Embodiment 4 of this utility model;

[0036] Figure 5 This is a circuit diagram of the radio frequency front-end module provided in Embodiment 5 of this utility model.

[0037] In the diagram, 100 is the RF front-end module, 1 is the first chip, 2 is the second chip, 3 is the third chip, 4 is the substrate, 5 is the power amplifier circuit, 51 is the first matching circuit, 52 is the second matching circuit, 53 is the transmitter bias circuit, 54 is the power amplifier, 6 is the first control unit, 7 is the second control unit, 8 is the first voltage conversion circuit, 9 is the control module, 91 is the switching circuit, 911 is the first low-noise amplifier, 912 is the second low-noise amplifier, 92 is the second voltage conversion circuit, and 93 is the switch control circuit. Detailed Implementation

[0038] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, every other embodiment obtained by those of ordinary skill in the art without creative effort is within the protection scope of the present utility model.

[0039] Example 1

[0040] Combined with appendix Figure 1As shown, the utility model embodiment provides a kind of radio frequency front-end module 100, the radio frequency front-end module 100 includes: substrate 4, first chip 1 (Die1) being set on the substrate 4, second chip 2 (Die2) and third chip 3 (Die3).

[0041] The first chip 1 is equipped with power amplification circuit 5 and first control unit 6, the first control unit 6 is used to receive external logic control signal (GPIO / MIPI) to control the power amplification circuit 5 and carry out conduction or disconnect, the power amplification circuit 5 is used to amplify the radio frequency signal of sending and process.

[0042] The second chip 2 is equipped with first voltage conversion circuit 8, for converting the voltage of power supply VDD into preset voltage and then outputting to the first chip 1 to realize power supply.

[0043] The third chip 3 is equipped with control module 9 and second control unit 7, the control module 9 is used to process the amplified signal output by the power amplification circuit 5 and output corresponding control signal to realize switch switching;The second control unit 7 is used to carry out conduction or disconnect to the control module 9.

[0044] The first input end of the power amplification circuit 5 is used to connect to signal sending end TX In and the first control unit 6, the power amplification circuit 5 is used to amplify the input radio frequency signal;The output end of the power amplification circuit 5 is connected to the first input end of the control module 9.

[0045] The output end of the control module 9 is used to control switching different radio frequency signals to signal receiving end RX Out;The input end of the first voltage conversion circuit 8 is used to connect power supply VDD, the output end of the first voltage conversion circuit 8 is connected to the second input end of the power amplification circuit 5, and the first voltage conversion circuit 8 is used to convert the voltage of the power supply VDD into working voltage and output to the power amplification circuit 5;The second input end of the control module 9 is connected to the power supply VDD, for providing power supply for the control module 9.The control end of the control module 9 is used to connect to antenna end ANT.Through first control unit 6 and second control unit 7, the conduction or disconnect of power amplification circuit 5 and control module 9 is controlled respectively, to realize the switching of receiving mode and sending mode, reduce signal leakage, enhance the isolation degree of circuit, effectively reduce the implementation complexity of transmitting power control, reduce radiation, reduce energy consumption, improve product service life.

[0046] The first chip 1, the second chip 2 and the third chip 3 are in a Die structure; the substrate 4 can be formed in a frame or a multi-layer circuit board or the like. The first chip 1, the second chip 2 and the third chip 3 are electrically connected through metal thin wires or internal wiring of the substrate.

[0047] In the embodiment, the first chip 1, the second chip 2 and the third chip 3 are in a Die structure; the substrate 4 can be formed in a frame or a multi-layer circuit board or the like. The first chip 1, the second chip 2 and the third chip 3 are electrically connected through metal thin wires or internal wiring of the substrate. Figure 1 As shown in the figure, the first control unit 6 includes a first switch S1 and a first capacitor C1, the control end of the first switch S1 is connected to ground through the first capacitor C1 in series, and the output end of the first switch S1 is connected to the first input end of the power amplification circuit 5. The second control unit 7 includes a second switch S2 and a second capacitor C2, the control end of the second switch S2 is connected to ground through the second capacitor C2 in series, and the output end of the second switch S2 is connected to the output end of the control module 9. When the radio frequency front-end module 100 works in the receiving mode, the first switch S1 is turned on, and the second switch S2 is turned off; when the radio frequency front-end module 100 works in the transmitting mode, the first switch S1 is turned off, and the second switch S2 is turned on.

[0048] Embodiment two

[0049] On the basis of the first embodiment, in the embodiment, the first chip 1, the second chip 2 and the third chip 3 are in a Die structure; the substrate 4 can be formed in a frame or a multi-layer circuit board or the like. The first chip 1, the second chip 2 and the third chip 3 are electrically connected through metal thin wires or internal wiring of the substrate. Figure 2 As shown in the figure, the first control unit 6 further includes a first inductor, the first end of the first inductor is connected to the control end of the first switch S1, and the second end of the first inductor is connected to ground through the first capacitor C1 in series. The second control unit 7 further includes a second inductor, the first end of the second inductor is connected to the control end of the second switch S2, and the second end of the second inductor is connected to ground through the second capacitor C2 in series. By adding the first inductor and the second inductor, the first inductor and the first capacitor C1 are connected in series, and the second inductor and the second capacitor C2 are connected in series.

[0050] The first inductor and the first capacitor C1 form a series resonance circuit, and the resonance frequency f = 1 / (2*π(L1*C1) 1 / 2 ). By selecting appropriate values of the first inductor and the first capacitor C1, f is the module receiving frequency.

[0051] The second inductor and the second capacitor C2 form a series resonance circuit, and the resonance frequency f = 1 / (2*π(L2*C2) 1 / 2 ). By selecting appropriate values of the second inductor and the second capacitor C2, f is the module transmitting frequency. Through the above design, the isolation degree is further improved.

[0052] Embodiment three

[0053] On the basis of the second embodiment, in the embodiment, the first chip 1, the second chip 2 and the third chip 3 are in a Die structure; the substrate 4 can be formed in a frame or a multi-layer circuit board or the like. The first chip 1, the second chip 2 and the third chip 3 are electrically connected through metal thin wires or internal wiring of the substrate. Figure 3As shown, the first control unit 6 further comprises a third switch S3, a control end of the third switch S3 being connected to a first input end of the power amplification circuit 5 and an output end of the first switch S1 respectively, and an output end of the third switch S3 being connected to the signal sending end. The second control unit 7 further comprises a fourth switch S4, a control end of the fourth switch S4 being connected to the signal receiving end, and an output end of the fourth switch S4 being connected to an output end of the control module 9 and an output end of the second switch S2 respectively.

[0054] Embodiment Four

[0055] In this embodiment, on the basis of the embodiment one, the accompanying drawings are combined. Figure 4 As shown, the first control unit 6 comprises a fifth switch S5, a control end of the fifth switch S5 being connected to a first input end of the power amplification circuit 5, and an output end of the fifth switch S5 being connected to the signal sending end. The second control unit 7 comprises a sixth switch S6, a control end of the sixth switch S6 being connected to the signal receiving end, and an output end of the sixth switch S6 being connected to an output end of the control module 9. The fifth switch S5 is connected in series between the signal sending end TX In and the first matching circuit 51, and the sixth switch S6 is connected in series between the switching circuit 91 and the signal receiving end RX Out. The fifth switch S5 and the sixth switch S6 are controlled by logic signals. When the module works in the transmitting mode, the fifth switch S5 is turned on, and the sixth switch S6 is turned off. At this time, the transmitting signal can enter the first matching circuit 51 through the fifth switch S5, and the transmitting leakage signal cannot return to the signal receiving end RX Out through the sixth switch S6. When the module works in the receiving mode, the fifth switch S5 is turned off, and the sixth switch S6 is turned on. At this time, the receiving signal can reach the signal grounding end RX Out through the sixth switch S6, and the receiving leakage signal cannot reach the signal sending end TX In through the fifth switch S5.

[0056] In this embodiment, the accompanying drawings are combined. Figure 1As shown, the control module 9 includes a switching circuit 91, a second voltage conversion circuit 92 and a switch control circuit 93; the input end of the switch control circuit 93 is used for connecting to an external logic control circuit, the output end of the switch control circuit 93 is used for outputting the control signal of the external logic control circuit to the switching circuit 91, realizing the switching function of the switching circuit 91; the first input end of the switching circuit 91 is used as the first input end of the control module 9, the input end of the second voltage conversion circuit 92 is used as the second input end of the control module 9, and the output end of the second voltage conversion circuit is connected to the second input end of the switching circuit 91; the output end of the switching circuit 91 is used as the output end of the control module 9, and the control end of the switching circuit 91 is used for connecting to the antenna end ANT. The switching circuit 91 is controlled by the switch control circuit 93 to perform corresponding switching, so that the radio frequency signals of different frequency bands are output through different switching channels, the radio frequency signal input and output control effect is good, and the overall reliability is high. The second voltage conversion circuit 92 is connected to the power supply VDD to provide power supply and control signal for the switching circuit 91.

[0057] In this embodiment, the accompanying drawings are combined Figure 1 As shown, the switching circuit 91 includes a first radio frequency switch SW1 and a first low noise amplifier 911; the output end of the switch control circuit 93 is used for controlling the first radio frequency switch SW1 to work; the control end of the first radio frequency switch SW1 is used as the control end of the switching circuit 91, the first output end of the first radio frequency switch SW1 is used as the first input end of the switching circuit 91, the second output end of the first radio frequency switch SW1 is connected to the input end of the first low noise amplifier 911, the output end of the first low noise amplifier 911 is also used as the output end of the switching circuit 91, and the third output end of the first radio frequency switch SW1 is connected to the output end of the first low noise amplifier 911. The second switch S2 of single-pole single-throw is controlled by a logic signal. When the module works in the receiving mode, the second switch S2 is cut off, and at this time the receiving signal can be output to the signal receiving end RX Out.

[0058] When the module works in the transmitting mode, the second switch S2 is turned on; at this time the signal receiving end RX Out is grounded through the circuit of the second switch S2 and the second capacitor C2. The capacitance value of the second capacitor C2 is related to the working frequency band of the module, and for the module working in the WIFI 2.4G frequency band, the capacitance value of the second capacitor C2 is in the order of tens of pf. At this time, the signal leaked from the transmitting path to the signal receiving end RX Out is introduced into the ground through the second switch S2 and the second capacitor C2, reducing the power of the transmitting signal leaked to the signal receiving end RX Out.

[0059] Specifically, the first RF switch SW1 is a single-pole triple-throw switch, controlled by the switch control circuit 93. When the module operates in transmit mode, the first RF switches SW1-1 and SW1-2 are turned on; when the module operates in receive mode, the first RF switches SW1-1 and SW1-3 are turned on; when the module operates in receive bypass mode, the first RF switches SW1-1 and SW1-4 are turned on.

[0060] Example 5

[0061] Based on Embodiment 1, this embodiment combines the appendix Figure 5 As shown, the switching circuit 91 includes a second RF switch SW2, a second low-noise amplifier 912, and a seventh switch S7. The output of the switch control circuit 93 controls the operation of the second RF switch SW2. The control terminal of the second RF switch SW2 serves as the control terminal of the switching circuit 91, the first output terminal of the second RF switch SW2 serves as the first input terminal of the switching circuit 91, the second output terminal of the second RF switch SW2 is connected to the input terminal of the second low-noise amplifier 912, and the input terminal of the second low-noise amplifier 912 also serves as the second input terminal of the switching circuit 91 and is connected to the output terminal of the second voltage conversion circuit 92. The control terminal of the seventh switch S7 is connected to the input terminal of the second low-noise amplifier 912, and the output terminal of the seventh switch S7 is connected to the output terminal of the second low-noise amplifier 912. At this time, the second low-noise amplifier 912 and the seventh switch S7 are both connected to pin 3 of the second RF switch SW2. When in receive mode and the received signal strength is below the threshold, the second low-noise amplifier 912 is working and the seventh switch S7 is off; when in receive mode and the received signal strength exceeds the threshold, the second low-noise amplifier 912 is not working and the seventh switch S7 is on.

[0062] In this embodiment, combined with the appendix Figures 1-5As shown, the power amplification circuit 5 includes a first matching circuit 51, a second matching circuit 52, a transmitting end bias circuit 53, and a power amplifier 54. An input end of the first matching circuit 51 serves as a first input end of the power amplification circuit 5, an input end of the transmitting end bias circuit 53 serves as a second input end of the power amplification circuit 5, output ends of the first matching circuit 51 and the transmitting end bias circuit 53 are respectively connected to input ends of the power amplifier 54, an output end of the power amplifier 54 is connected to an input end of the second matching circuit 52, and an output end of the second matching circuit 52 serves as an output end of the power amplification circuit 5. The input end of the power amplifier 54 is also used for connecting a power supply voltage. The first matching circuit 51 is used for realizing conversion of a signal transmitting end impedance into an optimal matching required by the power amplifier 54, and the second matching circuit 52 is used for realizing optimal matching between a power amplifier 54 output signal and the first radio frequency switch SW1.

[0063] In the embodiment, when the module works in the transmitting mode, the third switch S3 and the second switch S2 are turned on, and the first switch S1 and the fourth switch S4 are turned off. At this time, the transmitting signal can enter the first matching circuit 51 through the third switch S3, and the transmitting leakage signal is short-circuited to the ground through the second switch S2 and cannot return to the signal receiving end RX Out through the fourth switch S4.

[0064] When the module works in the receiving mode, the third switch S3 and the second switch S2 are turned off, and the first switch S1 and the fourth switch S4 are turned on. At this time, the receiving signal can reach the signal receiving end RX Out through the fourth switch S4, and the receiving leakage signal is short-circuited to the ground through the first switch S1 and cannot reach the signal transmitting end TX In through the third switch S3.

[0065] In the embodiment, the accompanying drawings are combined. Figures 1-5 As shown, the first chip 1, the second chip 2, and the third chip 3 are fixedly connected to the substrate 4 in a silver paste or solder ball welding manner.

[0066] In the embodiment, the accompanying drawings are combined. Figures 1-5 As shown, the first chip 1 is made of a GaAs process; the second chip 2 is made of a CMOS process; and the third chip 3 is made of a PHEMT or SOI process.

[0067] The first chip 1 is usually made of a GaAs process, but is not limited to the GaAs process. The GaAs process is an important semiconductor process technology, which is mainly used for preparing a gallium arsenide integrated circuit. The GaAs process technology includes a liftoff technology and the like, which are crucial for the preparation of the GaAs integrated circuit.

[0068] The second chip 2 is usually made by CMOS process, but is not limited to CMOS process. CMOS is the abbreviation of Complementary Metal Oxide Semiconductor, which refers to a technology for manufacturing large-scale integrated circuit chips or chips made by this technology.

[0069] The third chip 3 is usually made by PHEMT or SOI process, but is not limited to PHEMT or SOI process. PHEMT is an improved structure of high electron mobility transistor (HEMT), also known as pseudo-modulated doped heterojunction field effect transistor. SOI process, namely Silicon-On-Insulator technology, is an advanced semiconductor manufacturing technology, which realizes the medium isolation of components in integrated circuits by introducing a buried oxide layer between the top layer of silicon and the back substrate, thereby reducing the parasitic capacitance, improving the running speed, and reducing the power consumption.

[0070] In this embodiment, the accompanying drawings are combined Figures 1-5 As shown in the drawings, the single-pole single-throw first switch S1 is controlled by the input GPIO or MIPI signal. When the module works in the transmission mode, the first switch S1 is cut off, and at this time the radio frequency signal of the signal sending end can enter the first matching circuit 51.

[0071] When the module works in the receiving mode, the first switch S1 is turned on; at this time, the signal sending end is grounded through the first switch S1 and the first capacitor C1 circuit. The capacitance value of the first capacitor C1 is related to the working frequency band of the module. For the module working in the WIFI 2.4G frequency band, the capacitance value of the first capacitor C1 is in the order of tens of pf. At this time, the signal leaked to the signal sending end TX In through the receiving path is guided into the ground through the first switch S1 and the first capacitor C1.

[0072] The externally input power supply VDD provides working power supply for the first voltage conversion circuit 8 in the second chip 2, and also provides working power supply for the second voltage conversion circuit 92; the first voltage conversion circuit 8 converts the input power supply VDD into a suitable voltage and outputs it to the bias circuit of the first chip 1. The second voltage conversion circuit 92 converts the power supply VDD into a suitable voltage and outputs it to the received first low noise amplifier 911.

[0073] It should be noted that in this text, the term "comprising", "including" or any other variant thereof is intended to cover a non-exclusive inclusion, so that a process, method, article or apparatus that includes a list of elements not only includes those elements, but also includes other elements not expressly listed or inherent to such process, method, article or apparatus. Without more limitations, the element defined by the statement "comprising a" does not exclude the presence of additional identical elements in the process, method, article or apparatus that includes the element.

[0074] Through the description of the above embodiments, those skilled in the art can clearly understand that the above-mentioned embodiment method can be realized by means of software and the necessary general hardware platform, of course, it can also be realized by hardware, but in many cases the former is a better embodiment. Based on such understanding, the technical solutions of the present application can be embodied in the form of software products, and the computer software product is stored in a storage medium (such as ROM / RAM, magnetic disk, optical disk), and includes a plurality of instructions for making a terminal (which can be a mobile phone, computer, server, air conditioner, or network equipment, etc.) execute the method described in each embodiment of the present application.

[0075] The above disclosed is only the preferred embodiment of the present application, of course, cannot limit the scope of the present application, therefore, the equivalent changes made according to the claims of the present application still belong to the scope covered by the present application.

Claims

1. A radio frequency front-end module, characterized in that, The radio frequency front-end module includes: a substrate, a first chip, a second chip, and a third chip disposed on the substrate; The first chip is provided with a power amplifier circuit and a first control unit. The first control unit is used to receive external logic control signals to control the power amplifier circuit to be turned on or off. The power amplifier circuit is used to amplify the radio frequency signal. The second chip is equipped with a first voltage conversion circuit, which is used to convert the voltage of the power supply into a preset voltage and output it to the first chip to provide power. The third chip is equipped with a control module and a second control unit. The control module is used to process the amplified signal output by the power amplifier circuit and output corresponding control signals to realize switching. The second control unit is used to turn the control module on or off. The first input terminal of the power amplifier circuit is used to connect to the signal transmitting terminal and the first control unit, and the power amplifier circuit is used to amplify the input radio frequency signal; the output terminal of the power amplifier circuit is connected to the first input terminal of the control module. The output of the control module is used to control the switching of different radio frequency signals to the signal receiving end; The input terminal of the first voltage conversion circuit is used to connect to the power supply, and the output terminal of the first voltage conversion circuit is connected to the second input terminal of the power amplifier circuit. The first voltage conversion circuit is used to convert the voltage of the power supply into the operating voltage and output it to the power amplifier circuit. The second input terminal of the control module is connected to the power supply, and the control terminal of the control module is used to connect to the antenna terminal.

2. The radio frequency front-end module as described in claim 1, characterized in that, The first control unit includes a first switch and a first capacitor. The control terminal of the first switch is grounded after being connected in series with the first capacitor. The output terminal of the first switch is connected to the first input terminal of the power amplifier circuit. The second control unit includes a second switch and a second capacitor. The control terminal of the second switch is grounded after being connected in series with the second capacitor, and the output terminal of the second switch is connected to the output terminal of the control module. When the radio frequency front-end module is operating in receive mode, the first switch is turned on and the second switch is turned off. When the radio frequency front-end module is operating in transmit mode, the first switch is off and the second switch is on.

3. The radio frequency front-end module as described in claim 2, characterized in that, The first control unit further includes a first inductor, a first end of which is connected to the control terminal of the first switch, and a second end of which is grounded after being connected in series with the first capacitor. The second control unit further includes a second inductor, the first end of which is connected to the control terminal of the second switch, and the second end of which is grounded after being connected in series with the second capacitor.

4. The radio frequency front-end module as described in claim 3, characterized in that, The first control unit further includes a third switch, the control terminal of the third switch being connected to the first input terminal of the power amplifier circuit and the output terminal of the first switch, and the output terminal of the third switch being connected to the signal transmitting terminal; The second control unit further includes a fourth switch, the control terminal of which is connected to the signal receiving terminal, and the output terminal of which is connected to the output terminal of the control module and the output terminal of the second switch, respectively.

5. The radio frequency front-end module as described in claim 1, characterized in that, The first control unit includes a fifth switch, the control terminal of which is connected to the first input terminal of the power amplifier circuit, and the output terminal of which is connected to the signal transmitting terminal. The second control unit includes a sixth switch, the control terminal of which is connected to the signal receiving terminal, and the output terminal of which is connected to the output terminal of the control module.

6. The radio frequency front-end module as described in claim 1, characterized in that, The control module includes a switching circuit, a second voltage conversion circuit, and a switch control circuit. The input terminal of the switch control circuit is used to connect to an external logic control circuit, and the output terminal of the switch control circuit is used to output the control signal of the external logic control circuit to the switching circuit to realize the switching function of the switching circuit; the first input terminal of the switching circuit serves as the first input terminal of the control module, the input terminal of the second voltage conversion circuit serves as the second input terminal of the control module, and the output terminal of the second voltage conversion circuit is connected to the second input terminal of the switching circuit; the output terminal of the switching circuit serves as the output terminal of the control module, and the control terminal of the switching circuit is used to connect to the antenna terminal.

7. The radio frequency front-end module as described in claim 6, characterized in that, The switching circuit includes a first radio frequency switch and a first low-noise amplifier; The output terminal of the switch control circuit is used to control the operation of the first radio frequency switch; the control terminal of the first radio frequency switch serves as the control terminal of the switching circuit, the first output terminal of the first radio frequency switch serves as the first input terminal of the switching circuit, the second output terminal of the first radio frequency switch is connected to the input terminal of the first low noise amplifier, the output terminal of the first low noise amplifier also serves as the output terminal of the switching circuit, and the third output terminal of the first radio frequency switch is connected to the output terminal of the first low noise amplifier.

8. The radio frequency front-end module as described in claim 6, characterized in that, The switching circuit includes a second radio frequency switch, a second low-noise amplifier, and a seventh switch. The output of the switch control circuit is used to control the operation of the second radio frequency switch. The control terminal of the second RF switch serves as the control terminal of the switching circuit, the first output terminal of the second RF switch serves as the first input terminal of the switching circuit, the second output terminal of the second RF switch is connected to the input terminal of the second low-noise amplifier, and the input terminal of the second low-noise amplifier also serves as the second input terminal of the switching circuit and is connected to the output terminal of the second voltage conversion circuit; the control terminal of the seventh switch is connected to the input terminal of the second low-noise amplifier, and the output terminal of the seventh switch is connected to the output terminal of the second low-noise amplifier.

9. The radio frequency front-end module as described in claim 1, characterized in that, The power amplifier circuit includes a first matching circuit, a second matching circuit, a transmitter bias circuit, and a power amplifier. The input terminal of the first matching circuit serves as the first input terminal of the power amplifier circuit, and the input terminal of the transmitting bias circuit serves as the second input terminal of the power amplifier circuit. The output terminals of the first matching circuit and the transmitting bias circuit are respectively connected to the input terminals of the power amplifier. The output terminal of the power amplifier is connected to the input terminal of the second matching circuit, and the output terminal of the second matching circuit serves as the output terminal of the power amplifier circuit. The input terminal of the power amplifier is also used to connect to the power supply voltage.

10. The radio frequency front-end module as described in claim 1, characterized in that, The first chip, the second chip, and the third chip are fixedly connected to the substrate by means of silver paste or solder balls.

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