一种射频放大器上电时序及偏置点控制方法

doi:10.16180/j.cnki.issn1007-7820.2021.02.001

Abstract

Abstract:

The RF amplifier has the problems of complicated power-on sequence and inaccurate delay, and the bias point is not easy to meet the requirements of the device. To solve these problems, a method of controlling the power on timing sequence and bias point of RF amplifier based on STM32F302K8 is proposed in the present study. The method controlls the power chip to delay power-on by the microcomputer IO to ensure that the HMC637 drain power supply and the gate power supply are sequentially powered up.According to the ADC sampling bias current the DAC is used to adjust the HMC637 gate voltaget to make the bias current reach the required value. The test results show that the proposed method can realize the power-on sequence of each power supply at intervals of 6 ms, and adjust the gate voltage of HMC637 to make the bias current reach the target value of 400 mA, which fully meets the requirements of the chip. Additionally, the design is not affected by the device technology, and has self-adaptability and broad application prospect.

Key words: MATLAB GUI, digital signal processing, simulation platform, convolution, CZT, FFT, power spectrum, IIR, FIR, adaptive filter, RF amplifier, STM32, power up sequence, bias current, ADC, DAC

CLC Number:

TN911.72

HE Qiang,YANG Qinghui,ZHANG Huaiwu. A Control Method of Power up Bias Sequence of Radio Frequency Amplifier[J].Electronic Science and Technology, 2021, 34(2): 1-6.

Figures/Tables 9

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References 16

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A Control Method of Power up Bias Sequence of Radio Frequency Amplifier

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