CN-224233659-U - Power supply voltage adjustable circuit applied to radio frequency amplifier and radio frequency amplifier

CN224233659UCN 224233659 UCN224233659 UCN 224233659UCN-224233659-U

Abstract

The utility model relates to the technical field of power supply design of radio frequency amplifiers, in particular to a power supply voltage adjustable circuit applied to a radio frequency amplifier and the radio frequency amplifier; the power supply voltage adjustable circuit applied to the radio frequency amplifier comprises a power supply control chip and a switch driving circuit which are in power supply connection with an external power supply, a peripheral circuit connected with the power supply control chip, a current limiting protection circuit with one end connected with a voltage output end of the power supply control chip and the other end connected with the power supply control chip, an enabling driving circuit with one end connected with the power supply control chip and the other end connected with a control circuit of the radio frequency amplifier, and a digital output adjusting voltage circuit with one end connected with the power supply control chip and the other end connected with the voltage output end of the power supply control chip together with the switch driving circuit. The utility model realizes high-precision adjustable and stable output of the power supply voltage of the radio frequency amplifier, and is suitable for communication systems with high frequency and high stability requirements.

Inventors

YU YANG
ZHANG ZHICHENG
LI CHUNYUAN

Assignees

吉林省栅莱特激光科技有限公司

Dates

Publication Date: 20260512
Application Date: 20250605

Claims (8)

1. A supply voltage adjustable circuit for a radio frequency amplifier, comprising: The power supply control chip is in power supply connection with an external power supply and the switch driving circuit; the switch driving circuit is connected with the power supply control chip; A peripheral circuit connected with the power control chip; one end of the current limiting protection circuit is connected with the voltage output end of the power supply control chip, and the other end of the current limiting protection circuit is connected with the power supply control chip; And one end of the enabling driving circuit is connected with the power supply control chip, and the other end of the enabling driving circuit is connected with the control circuit of the radio frequency amplifier; The power supply control circuit also comprises a digital output regulating voltage circuit, wherein one end of the digital output regulating voltage circuit is connected with the power supply control chip, and the other end of the digital output regulating voltage circuit and the switch driving circuit are connected with the voltage output end of the power supply control chip together.
2. The power supply voltage adjustable circuit applied to a radio frequency amplifier according to claim 1, wherein the switch driving circuit comprises a first switch unit, a second switch unit, a third switch unit, a fourth switch unit, a second energy storage unit, a first protection unit, a second protection unit, a third protection unit, a fourth protection unit, a second sampling resistor and an input resistor; The positive terminal of the 48V voltage of the external power supply is connected with the first protection unit and grounded; the power supply control chip is connected with the second protection unit through a first network connection point 48V-1 and is grounded; the 48V voltage positive terminal, the input resistor and the first network connection point 48V-1 are sequentially connected; the pin VCC of the enabling signal driving circuit is connected with the third protection unit and grounded; the current-limiting protection circuit is connected with the fourth protection unit through a second network connection point VCC-1 and is grounded; One end of the second energy storage unit is connected with the first switch unit, the third switch unit and the SW1 pin of the power control chip, and the other end of the second energy storage unit is connected with the second switch unit, the fourth switch unit and the SW2 pin of the power control chip; The first switch unit is also connected with the first network connection point 48V-1 and the pin TG1 of the power control chip, and the second switch unit is also connected with the second network connection point VCC-1 and the pin TG2 of the power control chip; The third switch unit is also connected with pins BG1 and SNSP of the power control chip; the fourth switch unit is also connected with pins BG2 and SNSP of the power control chip; the pin SNSP is connected to the second sampling resistor and to ground.
3. The power supply voltage adjustable circuit for a radio frequency amplifier according to claim 1, wherein an input end of the enabling driving circuit is connected with a 3.3V voltage positive end of the control circuit, and a 5V voltage output end of the enabling driving circuit is connected with a pin EN of a power supply control chip.
4. The circuit of claim 1, wherein the current limiting protection circuit comprises a capacitor C18, a resistor R21, a capacitor CC3, a capacitor C20, a first sampling resistor, a first fuse and a second fuse; The pin VCC, the first sampling resistor and the second network connection point VCC-1 are sequentially connected; The pin VCC is connected with one end of a first fuse, and the other end of the first fuse is connected with one end of a resistor R21, and the other end of the resistor R21 is connected with one end of a capacitor C18 and a pin ISN of a power control chip; The second network connection point VCC-1 is connected with one end of a second fuse, the other end of the second fuse is connected with the capacitor C20 and grounded, and the other end of the second fuse is also connected with the other end of the capacitor C18 and a pin ISP of the power supply control chip.
5. The power supply voltage adjustable circuit for a radio frequency amplifier according to claim 1, wherein the digital output adjustment voltage circuit comprises a digital adjustment voltage circuit and a voltage acquisition circuit; one end of the digital voltage regulating circuit is connected with the power supply control chip, the other end is connected with one end of the voltage acquisition circuit; The other end of the voltage acquisition circuit and the switch driving circuit are connected with the voltage output end of the power supply control chip.
6. The circuit of claim 5, wherein the voltage acquisition circuit comprises a first resistor, a ninth resistor and a fifth resistor which can be canceled; The first resistor, the fifth resistor and the ninth resistor are sequentially connected in series and are commonly grounded with a GND pin of a potentiometer in the digital regulating circuit, wherein the fifth resistor is specifically detachably connected with the first resistor and the ninth resistor, and when the fifth resistor is not used, the first resistor is not connected with the ninth resistor; the first resistor is connected to pin VCC.
7. The power supply voltage adjustable circuit for a radio frequency amplifier according to claim 5, wherein the digital adjustment voltage circuit comprises a potentiometer, a potentiometer control unit, a potentiometer protection unit and a feedback voltage adjustment unit; The 5V voltage output end, the potentiometer control unit and the potentiometer are connected in sequence; the 5V voltage output end is connected with a pin VDD of the potentiometer; The 5V voltage output end is connected with a pin VLOGIC of the potentiometer, and meanwhile, the 5V voltage output end is connected with the potentiometer protection unit and grounded; the feedback voltage regulating unit comprises a fourth resistor, an eighth resistor which can be canceled from being set and a potentiometer resistor; The input ends of the pin W, the eighth resistor, the fourth resistor and the potentiometer resistor of the potentiometer are sequentially connected; the power supply control chip comprises a pin FB, a fourth resistor, an eighth resistor, a third resistor, a fourth resistor and a fourth resistor, wherein the pin FB of the power supply control chip is connected with a pin W of the potentiometer through the eighth resistor; when the eighth resistor is not used, the pin FB of the power supply control chip is not connected with the pin W of the potentiometer; The first output end of the potentiometer resistor is connected with the common connection end of the first resistor and the fifth resistor and is connected with a pin B of the potentiometer; the second output end of the potentiometer resistor is connected with the common connecting end of the fifth resistor and the ninth resistor and is connected with a pin A of the potentiometer; The potentiometer resistor is detachably connected with the fourth resistor, the potentiometer A pin and the potentiometer B pin; When the potentiometer resistor is not used, the potentiometer resistor is not connected with the pin A of the potentiometer, the pin B of the potentiometer and the fourth resistor; the fifth resistor and the eighth resistor are used or cancelled synchronously, and the potentiometer resistor and the fifth resistor are not used simultaneously.
8. The radio frequency amplifier is characterized by comprising a control circuit, a first amplifier, a second amplifier, a third amplifier and a laser resonant cavity which are sequentially connected in an energy supply way; the power supply voltage adjustable circuit applied to the radio frequency amplifier according to any one of claims 1 to 7 is in energy supply connection with the first amplifier, the second amplifier and the third amplifier respectively; The input end of the power supply voltage adjustable circuit applied to the radio frequency amplifier is connected with an external power supply.

Description

Power supply voltage adjustable circuit applied to radio frequency amplifier and radio frequency amplifier Technical Field The utility model relates to the technical field of power supply design of radio frequency amplifiers, in particular to a power supply voltage adjustable circuit applied to a radio frequency amplifier and the radio frequency amplifier. Background With the continuous development of technology, the conventional circuit structure with fixed supply voltage of the radio frequency amplifier is difficult to meet the requirement of the technological advancement, so that a person skilled in the art proposes various techniques for adjusting the supply voltage of the radio frequency amplifier, such as 1) envelope tracking technique, 2) linear power supply modulator, 3) switching power supply modulator, 4) hybrid power supply modulator, and 5) multi-mode power amplifier, but the existing methods are not applicable to communication systems with high frequency and high stability requirements; Therefore, it is needed to provide a new supply voltage adjustable circuit for a radio frequency amplifier. Disclosure of utility model Accordingly, the present utility model is directed to overcoming the above-mentioned drawbacks of the prior art, and providing a supply voltage adjustable circuit for a radio frequency amplifier. A supply voltage adjustable circuit for a radio frequency amplifier, comprising: The power supply control chip is in power supply connection with an external power supply and the switch driving circuit; the switch driving circuit is connected with the power supply control chip; A peripheral circuit connected with the power control chip; one end of the current limiting protection circuit is connected with the voltage output end of the power supply control chip, and the other end of the current limiting protection circuit is connected with the power supply control chip; And one end of the enabling driving circuit is connected with the power supply control chip, and the other end of the enabling driving circuit is connected with the control circuit of the radio frequency amplifier; The power supply control circuit also comprises a digital output regulating voltage circuit, wherein one end of the digital output regulating voltage circuit is connected with the power supply control chip, and the other end of the digital output regulating voltage circuit and the switch driving circuit are connected with the voltage output end of the power supply control chip together. Preferably, the switch driving circuit includes a first switch unit, a second switch unit, a third switch unit, a fourth switch unit, a second energy storage unit, a first protection unit, a second protection unit, a third protection unit, a fourth protection unit, a second sampling resistor and an input resistor; The positive terminal of the 48V voltage of the external power supply is connected with the first protection unit and grounded; the power supply control chip is connected with the second protection unit through a first network connection point 48V-1 and is grounded; the 48V voltage positive terminal, the input resistor and the first network connection point 48V-1 are sequentially connected; the pin VCC of the enabling signal driving circuit is connected with the third protection unit and grounded; the current-limiting protection circuit is connected with the fourth protection unit through a second network connection point VCC-1 and is grounded; One end of the second energy storage unit is connected with the first switch unit, the third switch unit and the SW1 pin of the power control chip, and the other end of the second energy storage unit is connected with the second switch unit, the fourth switch unit and the SW2 pin of the power control chip; The first switch unit is also connected with the first network connection point 48V-1 and the pin TG1 of the power control chip, and the second switch unit is also connected with the second network connection point VCC-1 and the pin TG2 of the power control chip; The third switch unit is also connected with pins BG1 and SNSP of the power control chip; the fourth switch unit is also connected with pins BG2 and SNSP of the power control chip; the pin SNSP is connected to the second sampling resistor and to ground. Preferably, the input end of the enabling driving circuit is connected with the 3.3V voltage positive end of the control circuit, and the 5V voltage output end of the enabling driving circuit is connected with the pin EN of the power supply control chip. Preferably, the current limiting protection circuit comprises a capacitor C18, a resistor R21, a capacitor CC3 and a capacitor C20, a first sampling resistor, a first fuse and a second fuse; The pin VCC, the first sampling resistor and the second network connection point VCC-1 are sequentially connected; The pin VCC is connected with one end of a first fuse, and the other end of the first fuse is connected with one end