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Power Control Circuit of RF Power Amplifier

A technology of radio frequency power and power control, which is applied in the direction of control/regulation systems, instruments, and adjustment of electrical variables, etc., can solve problems such as high process requirements, and achieve the effects of saving precise resistors, small size, and high efficiency

Active Publication Date: 2015-10-21
广州钧衡微电子科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Its disadvantage is that the high-frequency circuit design of power detection has higher requirements on the process

Method used

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  • Power Control Circuit of RF Power Amplifier
  • Power Control Circuit of RF Power Amplifier
  • Power Control Circuit of RF Power Amplifier

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Embodiment Construction

[0025] The present invention will be further described below in conjunction with the embodiments and accompanying drawings, but the protection scope of the present invention should not be limited thereby.

[0026] See Pic 4-1 , Figure 5 , Image 6 , Pic 4-1 It is one of the schematic diagrams of the power control circuit of the radio frequency power amplifier of the present invention, Figure 5 is the relationship between mirror current and output power, Image 6 It is the circuit diagram of the first embodiment of the power control circuit of the radio frequency power amplifier integrated circuit of the present invention. It can be seen from the figure that the radio frequency power amplifier in the figure is a three-stage radio frequency power amplifier based on GaAs HBT. It consists of the first capacitor C1, the second capacitor C2, the second capacitor Three capacitors C3, the first inductance L1, the second inductance L2, the third inductance L3, the first resisto...

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Abstract

A power control circuit of a radio frequency power amplifier is composed of a control loop and a current-voltage converter. The power control circuit of the radio frequency power amplifier particularly comprises a fourth power amplifier tube, a first MOS field effect transistor, a second MOS field effect transistor, a third MOS field effect transistor, a fourth resistor, a fifth resistor and a fourth capacitor. Compared with a power control circuit of a common GSM radio frequency power amplifier, the power control circuit of the radio frequency power amplifier has the advantages that a controller device with a large size is not needed, accurate resistors in series connection to a power source are reduced, the radio frequency power amplifier is directly connected with a power voltage, extra voltage drop does not exist, cost is low, the size is small, and the efficiency is high.

Description

technical field [0001] The invention relates to a radio frequency power amplifier, in particular to a power control circuit of the radio frequency power amplifier. Background technique [0002] Conventional GSM power amplifier power control, such as figure 1 , figure 2 and image 3 shown. Usually the power amplifier and the controller are implemented by different processes. The power amplifier is usually realized by GaAs technology, and the controller is usually realized by CMOS technology. [0003] figure 1 The control principle is open loop control. The output power of the GSM power amplifier increases with the increase of the power supply voltage; the controller provides power for the power amplifier, and its output voltage is the power supply voltage of the power amplifier; the output voltage of the controller increases with the increase of the input vramp voltage; so the output power of the power amplifier Increases with increasing controller input voltage. The...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G05F1/66
Inventor 冯卫锋章国豪赵家彦李义梅
Owner 广州钧衡微电子科技有限公司