|本期目录/Table of Contents|

[1]顾泽凌,张 衡,丁红晖,等.一种ADC射随放大电路的设计与分析[J].工业仪表与自动化装置,2020,(05):24-27+46.[doi:1000-0682(2020)05-0000-00]
　GU Zeling,ZHANG Heng,DING Honghui,et al.Design and analysis of an ADC emitter-follow amplify circuit[J].Industrial Instrumentation & Automation,2020,(05):24-27+46.[doi:1000-0682(2020)05-0000-00]
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一种ADC射随放大电路的设计与分析

《工业仪表与自动化装置》[ISSN:1000-0682/CN:61-1121/TH]

卷:
期数:
2020年05期
页码:
24-27+46
栏目:
出版日期:
2020-10-15

文章信息/Info

Title:
Design and analysis of an ADC emitter-follow amplify circuit
作者:
顾泽凌; 张 衡; 丁红晖; 杨明远
上海无线电设备研究所，上海 200090
Author(s):
GU Zeling;  ZHANG Heng;  DING Honghui;  YANG Mingyuan
The Institute of Shanghai Radio Equipment, Shanghai 200090, China
关键词:
射随; 共模输入; AD8041; ADC; 可靠性
Keywords:
emitter-follow;  common-mode input;  AD8041;  ADC;  reliability
分类号:
TN710
DOI:
1000-0682(2020)05-0000-00
文献标志码:
A
摘要:
为了解决有效载荷中采集的模拟量范围大和现有可靠性成熟器件共模输入范围不足之间的矛盾，该文设计了一种射随放大电路。该设计采用AD8041作为射随运算放大器，将直接输入方式改为先用电阻分压输入，经过射随放大后再用电阻抬压输出，同时为了避免输入悬空时导致射随不稳，还需在运算放大器输入端串联电容接地。经过分析AD8041放大后的模拟信号和模数转换后的数据，该电路满足设计要求，同时为空间科学领域的ADC采集处理中，对可靠性成熟元器件共模输入范围无法满足采集量值的问题提供了一种设计方法，有广泛的实用意义。
Abstract:
In order to solve the contradiction between the large analog range of analog signal what been collected in payload and the insufficient common-mode input-range of existing reliable mature devices,an emitter-follow amplifier circuit has been designed.It uses the AD8041 as the emitter-follow operational amplifier.In this design,the traditional method that uses direct-inputting has been changed to be a new method that uses a resistor to divide input voltage firstly.After the voltage has been amplified with emitter-follow,the output voltage will be raised by resistor similarly. At the same time,to avoid the emitter-follow being unstable when the input is empty,it also connects series capacitors between the input pin of operational amplifier and ground.After analyzing the analog signal amplified by AD8041 and the data after analog-to-digital conversion, the circuit meets the design requirements.This design provides a design method for the acquisition and processing of ADCs in the field of space science for the problem that the common mode input range of mature components cannot meet the acquisition value, which has wide practical significance.

参考文献/References:

[1] 郭晓宇.基于运放测试大输入范围ADC电路的设计[J].中国测试,2017,43(S1):113-116.

[2] 杨圣龙,任勇峰,李辉景.基于FPGA的模/数混合采集系统优化设计[J].现代电子技术,2018,41(06): 117-120+124.
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备注/Memo

备注/Memo:
收稿日期：2020-04-12
作者简介：顾泽凌（1992），男，硕士研究生，主要研方向为数字信号处理方面。
更新日期/Last Update: 1900-01-01