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CN-122001402-A - Radio frequency front end module and electronic equipment

CN122001402ACN 122001402 ACN122001402 ACN 122001402ACN-122001402-A

Abstract

The application discloses a radio frequency front-end module and electronic equipment. The radio frequency front end module comprises a power amplifier, a first power module, a second power module and a switch module. The first power module is connected between the power supply port and the power supply end of the power amplifier, and the second power module is connected between the power supply port and the power supply end of the power amplifier. The switch module comprises a first switch connected with the first power supply module and a second switch connected with the second power supply module, wherein the first switch is conducted when the power amplifier is in a first working mode and is disconnected when the power amplifier is in a second working mode, and the second switch is conducted when the power amplifier is in the second working mode and is disconnected when the power amplifier is in the first working mode. Wherein the output power of the power amplifier in the first operation mode is greater than the output power in the second operation mode. The application can improve the switching efficiency of the working mode of the power amplifier.

Inventors

  • GAO TIANBAO
  • YANG KUI
  • NI JIANXING

Assignees

  • 锐石创芯(深圳)半导体有限公司

Dates

Publication Date
20260508
Application Date
20251226

Claims (20)

  1. 1. The radio frequency front end module is characterized by being provided with a power supply port for inputting power supply voltage, and comprises: The power amplifier is provided with a power supply end; the first power supply module is connected between the power supply port and the power supply end of the power amplifier and is used for converting the power supply voltage into a first power supply voltage; A second power supply module connected between the power supply port and the power supply end of the power amplifier for converting the power supply voltage into a second power supply voltage having a smaller magnitude than the first power supply voltage, and The switch module comprises a first switch connected with the first power supply module and a second switch connected with the second power supply module; the first switch is connected in a first working mode of the power amplifier and disconnected in a second working mode of the power amplifier, and the second switch is connected in the second working mode of the power amplifier and disconnected in the first working mode of the power amplifier; Wherein the output power of the power amplifier in the first working mode is larger than the output power in the second working mode.
  2. 2. The radio frequency front end module of claim 1, wherein the first switch is connected between an output of the first power module and a supply of the power amplifier or between the supply port and an input of the first power module; The second switch is connected between the output end of the second power supply module and the power supply end of the power amplifier, or between the power supply port and the input end of the second power supply module.
  3. 3. The radio frequency front end module of claim 1, further comprising a bandgap reference module for generating a bandgap reference voltage and a clock module for generating a clock signal; the first power supply module and the second power supply module are respectively connected with the band gap reference module, or/and the first power supply module and the second power supply module are respectively connected with the clock module.
  4. 4. The radio frequency front end module of claim 1, further comprising a plurality of bandgap reference modules for generating bandgap reference voltages, wherein the first power module and the second power module are respectively connected to different bandgap reference modules, or/and, The radio frequency front-end module further comprises a plurality of clock modules, wherein the clock modules are used for generating clock signals, and the first power module and the second power module are respectively connected with different clock modules.
  5. 5. The radio frequency front end module of claim 1, wherein the first power module comprises any one of a DC-DC buck converter circuit, a DC-DC boost chopper circuit, an envelope tracking power circuit, a low dropout linear regulator, or/and, The second power supply module comprises any one of a direct current-direct current buck conversion circuit, a direct current-direct current boost-buck chopper circuit, an envelope tracking power supply circuit and a low-dropout linear voltage regulator.
  6. 6. The radio frequency front end module as set forth in claim 1, wherein the first power module comprises a pulse width modulated DC-DC buck converter circuit and the second power module comprises a pulse frequency modulated DC-DC buck converter circuit, or The first power supply module and the second power supply module respectively comprise a pulse width modulation type direct current-direct current buck conversion circuit, or The first power supply module and the second power supply module respectively comprise a pulse frequency modulation type direct current-direct current buck conversion circuit.
  7. 7. The radio frequency front end module as set forth in claim 1, wherein the first power module and the second power module each comprise a pulse width modulated DC-DC buck converter circuit, wherein ramp signals used by the first power module and the second power module are the same, reference voltages used by the first power module and the second power module are different, or The first power supply module and the second power supply module respectively comprise pulse frequency modulation type direct current-direct current buck conversion circuits, wherein reference voltages adopted by the first power supply module and the second power supply module are different.
  8. 8. The radio frequency front end module of claim 1, wherein the first power module comprises a first buck unit, a first control unit, and a first feedback unit, wherein the first buck unit is connected between the power supply port and a power supply terminal of the power amplifier for converting the power supply voltage to a first power supply voltage that is less than the power supply voltage; the first feedback unit is also used for sampling the output voltage of the first voltage reduction unit to obtain a first sampling voltage and adjusting the duty ratio of the pulse width modulation signal according to the difference between a first reference voltage and the first sampling voltage; The first control unit is connected with the first voltage reduction unit and is used for adjusting the output voltage of the first voltage reduction unit according to the pulse width modulation signal so as to reduce the difference between the output voltage of the first voltage reduction unit and the target value of the first power supply voltage.
  9. 9. The radio frequency front end module of claim 8, wherein the first feedback unit comprises a first voltage divider subunit, a differential amplifier, and a first comparator; One end of the first voltage dividing subunit is connected with the output end of the first voltage reducing unit, and the other end of the first voltage dividing subunit is grounded; The first input end of the differential amplifier is connected with the first voltage dividing node, the second input end of the differential amplifier is used for inputting the first reference voltage, the output end of the differential amplifier is connected with the first input end of the first comparator, the output end of the differential amplifier is also connected with the first input end of the differential amplifier through a compensation network, and the differential amplifier is used for converting the difference value between the first reference voltage and the first sampling voltage into a control voltage; The second input end of the first comparator is used for inputting a ramp signal with fixed frequency, the output end of the first comparator is connected with the first control unit and used for comparing the control voltage with the ramp signal and outputting a comparison result, and the comparison result is the pulse width modulation signal.
  10. 10. The radio frequency front end module of claim 9, wherein the first voltage dividing subunit comprises a first voltage dividing resistor and a second voltage dividing resistor connected in series, and a connection node of the first voltage dividing resistor and the second voltage dividing resistor is the first voltage dividing node; wherein the resistance value of at least one of the first voltage dividing resistor and the second voltage dividing resistor is adjustable.
  11. 11. The radio frequency front end module as set forth in claim 9, wherein the compensation network comprises a first resistor and a first capacitor connected in series between the output and the first input of the differential amplifier, or The compensation network comprises a first resistor and a first capacitor connected in parallel between the output terminal and the first input terminal of the differential amplifier, or The compensation network includes a first capacitor connected between an output and a first input of the differential amplifier.
  12. 12. The radio frequency front end module of claim 8, wherein the first buck unit comprises a first switching tube, a second switching tube, a first inductor, a second capacitor, and a second resistor; The first end of the first switching tube is connected with the input end of the first voltage reduction unit, and the second end of the first switching tube is connected with the output end of the first voltage reduction unit through the first inductor; The first end of the second switching tube is connected with the second end of the first switching tube, and the second end of the second switching tube is grounded; one end of the second capacitor is connected with the output end of the first voltage reduction unit, and the other end of the second capacitor is grounded; The first control unit is connected with the control end of the first switching tube and the control end of the second switching tube respectively.
  13. 13. The radio frequency front end module of claim 1, wherein the second power module comprises a second buck unit, a second control unit, and a second feedback unit, wherein the second buck unit is connected between the power supply port and a power supply terminal of the power amplifier for converting the power supply voltage to a second power supply voltage that is less than the power supply voltage; The second feedback unit is also used for sampling the output voltage of the second voltage reduction unit to obtain a second sampling voltage and adjusting the duty ratio of the pulse frequency modulation signal according to the magnitude relation between a second reference voltage and the second sampling voltage; The second control unit is connected with the second voltage reduction unit and is used for adjusting the output voltage of the second voltage reduction unit according to the pulse frequency modulation signal so as to reduce the difference between the output voltage of the second voltage reduction unit and the target value of the second power supply voltage.
  14. 14. The radio frequency front end module of claim 13, wherein the second feedback unit comprises a second voltage divider subunit, a second comparator, and a frequency modulation subunit; one end of the second voltage division subunit is connected with the output end of the second voltage reduction unit, and the other end of the second voltage division subunit is grounded; The first input end of the second comparator is connected with the second voltage division node, the second input end of the second comparator is used for inputting the second reference voltage, the output end of the second comparator is connected with the input end of the frequency modulation subunit, and the second comparator is used for comparing the second reference voltage with the second sampling voltage and outputting a comparison result used for representing the magnitude relation between the second sampling voltage and the second reference voltage; The output end of the frequency modulation subunit is connected with the second voltage reduction unit and is used for converting the comparison result output by the second comparator into the pulse frequency modulation signal.
  15. 15. The radio frequency front end module according to claim 14, wherein the second voltage dividing subunit comprises a third voltage dividing resistor and a fourth voltage dividing resistor connected in series, and a connection node of the third voltage dividing resistor and the fourth voltage dividing resistor is the second voltage dividing node; Wherein the resistance value of at least one of the third voltage dividing resistor and the fourth voltage dividing resistor is adjustable.
  16. 16. The radio frequency front end module of claim 13, wherein the second buck unit comprises a third switching tube, a fourth switching tube, a second inductor, a third capacitor, and a third resistor; The first end of the third switching tube is connected with the input end of the second voltage reduction unit, and the second end of the third switching tube is connected with the output end of the second voltage reduction unit through the second inductor; The first end of the fourth switching tube is connected with the second end of the third switching tube, and the second end of the fourth switching tube is grounded; one end of the third capacitor is connected with the output end of the second voltage reduction unit, and the other end of the third capacitor is grounded; the second control unit is respectively connected with the control end of the third switching tube and the control end of the fourth switching tube.
  17. 17. The radio frequency front end module according to any one of claims 1 to 16, further comprising a control module connected to the control terminal of the first switch and the control terminal of the second switch, respectively; the control module is configured to respond to a mode switching instruction, and adjust the working state of the first switch and the working state of the second switch, wherein the mode switching instruction is used for indicating to switch the working modes of the power amplifier, and the working modes comprise the first working mode and the second working mode.
  18. 18. The radio frequency front end module according to any of claims 1 to 16, wherein the radio frequency front end module is applied to an electronic device comprising a control chip; The control end of the first switch is used for being connected with the control chip, and the control end of the second switch is used for being connected with the control chip.
  19. 19. The radio frequency front end module according to any one of claims 1 to 16, wherein the power amplifier is further provided with a signal input end, the radio frequency front end module further comprising a current source module, a bias module and a control module, the current source module being configured to output a reference current; the bias module is connected between the current source module and the signal input end of the power amplifier and is used for generating bias current according to the reference current; The control module is connected with the current source module and is configured to output a control signal to the current source module based on a working mode of the power amplifier, wherein the control signal is used for adjusting the amplitude of the reference current, and the amplitude of the reference current in the first working mode is larger than that of the reference current in the second working mode.
  20. 20. The radio frequency front end module according to claim 19, wherein the radio frequency front end module is further provided with a ground port, the current source module comprises an operational amplification unit, a current mirror unit and a resistance unit, the current mirror unit comprises a first current branch and a second current branch, and a first end of the first current branch and a first end of the second current branch are respectively connected with the power supply port; The output end of the operational amplification unit is respectively connected with the control end of the first current branch and the control end of the second current branch, the first input end of the operational amplification unit is used for inputting a third reference voltage, the second input end of the operational amplification unit is connected with the second end of the first current branch, and the second end of the second current branch is connected with the bias module; The resistor unit is connected between the second end of the first current branch and the grounding port, wherein a control signal output by the control module is used for adjusting working parameters of the current source module, and the working parameters of the current source module comprise at least one of a first size value of a transistor in the first current branch, a second size value of a transistor in the second current branch and an equivalent resistance value of the resistor unit.

Description

Radio frequency front end module and electronic equipment Technical Field The present application relates to the field of radio frequency technologies, and in particular, to a radio frequency front end module and an electronic device. Background At present, the radio frequency front-end module is widely applied to the fields of wireless communication, internet of things, smart home and the like, and can process radio frequency signals (such as power amplification, filtering, impedance matching and the like) so as to complete the task of receiving and transmitting the radio frequency signals. The power amplifier is used as a core device of the radio frequency front end module and is used for amplifying the power of a radio frequency signal so that the signal can be effectively radiated to the outside through the antenna. In some applications, the electronic device in which the rf front-end module is located switches the working Mode of the Power amplifier between a Low Power Mode (LPM) and a High Power Mode (HPM) according to the signal quality, the communication environment, the communication Mode, and the like. However, the conventional power amplifier has a problem in that the operation mode switching efficiency is low. Disclosure of Invention The application provides a radio frequency front-end module and electronic equipment. According to a first aspect of the present application, a radio frequency front end module is provided with a power supply port for inputting a power supply voltage. The radio frequency front end module comprises a power amplifier, a first power module, a second power module and a switch module. Wherein, the power amplifier is provided with a power supply end. The first power supply module is connected between the power supply port and the power supply end of the power amplifier and is used for converting the power supply voltage into a first power supply voltage. The second power supply module is connected between the power supply port and the power supply end of the power amplifier and is used for converting the power supply voltage into a second power supply voltage, and the amplitude of the second power supply voltage is smaller than that of the first power supply voltage. The switch module comprises a first switch connected with the first power supply module and a second switch connected with the second power supply module, wherein the first switch is conducted when the power amplifier is in a first working mode and is disconnected when the power amplifier is in a second working mode, and the second switch is conducted when the power amplifier is in the second working mode and is disconnected when the power amplifier is in the first working mode. Wherein the output power of the power amplifier in the first operation mode is greater than the output power in the second operation mode. In the radio frequency front end module provided by the application, two independent power supply modules (namely, a first power supply module and a second power supply module) and two switches (namely, a first switch and a second switch) are arranged. The power supply voltage output by the two power supply modules is different, and the two switches are connected with the two power supply modules in a one-to-one correspondence manner. The first operation mode may correspond to a high power mode of the power amplifier, and the second operation mode may correspond to a low power mode of the power amplifier. In particular, the supply voltages required by the power amplifier are not identical in the different modes of operation. Therefore, when the working mode of the power amplifier needs to be switched, the power supply voltages with different amplitudes can be output to the power supply end of the power amplifier by adjusting the working states of the two switches, so that the working mode can be switched rapidly. Specifically, the time period required to adjust the operating states of the two switches is typically less than or equal to 5 microseconds, which can significantly improve the switching efficiency of the operating mode of the power amplifier. According to a second aspect of the present application, the present application further provides a radio frequency front end module, where the radio frequency front end module is provided with a power supply port for inputting a power supply voltage. The radio frequency front end module comprises a low noise amplifier, a first power module, a second power module and a switch module. Wherein, the low noise amplifier is provided with a power supply terminal. The first power supply module is connected between the power supply port and the power supply end of the low noise amplifier and is used for converting the power supply voltage into a first power supply voltage. The second power supply module is connected between the power supply port and the power supply end of the low noise amplifier and is used for converting the power supply voltage into a sec