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Improved sensitivity for the superconducting ’’chopper’’ amplifier

 

作者: C. B. Friedberg,   C. H. Galfo,  

 

期刊: Review of Scientific Instruments  （AIP Available online 1976）
卷期: Volume 47, issue 12  

页码: 1457-1460

 

ISSN:0034-6748

 

年代: 1976

 

DOI:10.1063/1.1134553

 

出版商: AIP

 

数据来源: AIP

 

摘要:

A heterodyning modulation technique is described which results in an improved sensitivity for the superconducting chopper amplifier. Dc sensitivities of 3×10−12V were obtained in a 1 Hz noise bandwidth. An experimental comparison of various modulation schemes is presented.

 

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