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Power supply and method for operating a power supply

A power supply and supply voltage technology, which is applied to amplifiers, instruments, amplifiers, etc. with semiconductor devices/discharge tubes, and can solve problems such as complicated wiring, difficult compression of circuit area, and difficult design

Active Publication Date: 2018-11-02
RICHWAVE TECH CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Therefore, when using a directional coupler, it not only makes it difficult to compress the overall circuit area, but also makes the connection between circuits more complicated and difficult to design.

Method used

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  • Power supply and method for operating a power supply
  • Power supply and method for operating a power supply
  • Power supply and method for operating a power supply

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Experimental program
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Embodiment Construction

[0040] figure 1 It is a schematic diagram of a power amplifier PA according to an embodiment of the present invention. The power amplifier PA can input the wireless radio frequency signal RF in amplified to produce a radio frequency output signal RF out , the power amplifier PA can be a power amplifier controlled by the collector voltage, that is, the output power of the power amplifier PA can be controlled by the collector voltage V CC to control. In general, the total radiated power P of a collector-voltage-controlled power amplifier can be expressed, for example, by equation (1):

[0041]

[0042] where V CC Indicates the collector voltage received by the power amplifier PA, which can be provided by an external power supply circuit; V SAT Indicates the minimum operating voltage of the internal transistor of the power amplifier PA, which is a fixed value, and R LOAD is the external output impedance of the power amplifier PA. In formula (1), if it is not included in...

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Abstract

The invention discloses a power supply. The power supply includes a voltage regulator, a transistor, a current-to-voltage transform circuit, and a comparator. The voltage regulator receives a controlsignal, a source voltage, and a control voltage, and outputs a supply voltage according to the control voltage and the control signal. The transistor has a first terminal receiving the source voltage,and a control terminal coupled to the voltage regulator. The current-to-voltage transform circuit has a first terminal coupled to a second terminal of the transistor, a second terminal for receivinga reference voltage. The comparator has a first input terminal for receiving a comparison signal, a second input terminal coupled to the first terminal of the current-to-voltage transform circuit, andan output terminal for outputting the control voltage.

Description

technical field [0001] The present invention relates to a power supply, in particular to a power supply capable of adjusting output voltage according to output current control so as to reduce variation of total antenna radiation power. Background technique [0002] In the prior art, when the RF signal power amplifier is actually operated, the output impedance may not match when the frequency of the RF signal changes due to the characteristics of the antenna or the line. In this case, the overall total radiated power (TRP) will change due to impedance mismatch. [0003] In order to reduce the variation of the total radiated power and maintain the output efficiency of the power amplifier, the prior art senses part of the output current of the power amplifier through a directional coupler, and controls the power amplifier according to the sensing result to The effect of reducing the variation range of the total radiation power is achieved. However, a directional coupler requi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G05F1/625
CPCG05F1/625G05F1/561G05F1/575H03F1/0211H03F3/195H03F2200/451H02M3/33523H03F3/345H02M1/0022
Inventor 陈智圣叶家荣
Owner RICHWAVE TECH CORP