吉林师范大学学报(自然科学版)
吉林師範大學學報(自然科學版)
길림사범대학학보(자연과학판)
JILIN NORMAL UNIVERSITY JOURNAL(NATURAL SCIENCE EDITION)
2014年
4期
124-126
,共3页
极微弱信号%二阶低通滤波%高精度模数转换
極微弱信號%二階低通濾波%高精度模數轉換
겁미약신호%이계저통려파%고정도모수전환
extremely weak signal%second-order low-pass filter%high precision analog-digital conversion
在智能仪器仪表设计中,微弱信号转换精度、稳定度的高低直接影响着仪器的性能。为了对极微弱信号进行高精度模数转换,本文设计了以传感器为信号源,仪表放大、低通滤波,运算放大和 AD7705芯片为主要结构的转换电路。该电路能够完成对传感器产生的极微弱低频信号进行放大、去噪和模数转换,实验证明本文设计的电路能够有效转换极微弱电信号,为极微弱信号传感器在智能设备中的具体应用提供了合理的解决方案。
在智能儀器儀錶設計中,微弱信號轉換精度、穩定度的高低直接影響著儀器的性能。為瞭對極微弱信號進行高精度模數轉換,本文設計瞭以傳感器為信號源,儀錶放大、低通濾波,運算放大和 AD7705芯片為主要結構的轉換電路。該電路能夠完成對傳感器產生的極微弱低頻信號進行放大、去譟和模數轉換,實驗證明本文設計的電路能夠有效轉換極微弱電信號,為極微弱信號傳感器在智能設備中的具體應用提供瞭閤理的解決方案。
재지능의기의표설계중,미약신호전환정도、은정도적고저직접영향착의기적성능。위료대겁미약신호진행고정도모수전환,본문설계료이전감기위신호원,의표방대、저통려파,운산방대화 AD7705심편위주요결구적전환전로。해전로능구완성대전감기산생적겁미약저빈신호진행방대、거조화모수전환,실험증명본문설계적전로능구유효전환겁미약전신호,위겁미약신호전감기재지능설비중적구체응용제공료합리적해결방안。
In the design of intelligent instrumentation,the level of a weak signal conversion accuracy and stability directly affects the performance of the instrument. In order to transform extremely weak signals with high precision,a cricuit with sensor signal source,instrumentation amplifier,a low-pass filter and AD7705 chip as the main structure was designed. The circuit was able to complete producing a extremely weak low-frequency signal which was generated by the sensor amplification,reducing noise and transforming analog to digital. And the experiment could prove that it could effectively convert extremely weak signals,and provide a reasonable solution for a weak signal sensor in the application of intelligent device.