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Low‐Level dc Amplifier with Whole‐Loop Feedback

 

作者: P. C. Hoell,  

 

期刊: Review of Scientific Instruments  （AIP Available online 1958）
卷期: Volume 29, issue 12  

页码: 1120-1124

 

ISSN:0034-6748

 

年代: 1958

 

DOI:10.1063/1.1716092

 

出版商: AIP

 

数据来源: AIP

 

摘要:

The chopper amplifier described herein, using a 60‐cps vibrating‐contact modulator and whole‐loop negative feedback, has a stabilized gain of 107from dc to 10 cps. After the input circuits have reached thermal equilibrium, the zero drift is less than ±10−9v per hour and less than 2×10−9v per day.

 

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