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The Measurement of Small Alternating Voltages at Audiofrequencies

 

作者: E. A. Johnson,   C. Neitzert,  

 

期刊: Review of Scientific Instruments  （AIP Available online 1934）
卷期: Volume 5, issue 5  

页码: 196-200

 

ISSN:0034-6748

 

年代: 1934

 

DOI:10.1063/1.1751827

 

出版商: AIP

 

数据来源: AIP

 

摘要:

The origin of noise in vacuum tube amplifiers is discussed. An amplifier is described which can be used for the measurement of low voltages. A type 38 tube operated below ionizing voltages of the gas in the tube is found to have a low noise level. 10−8volt can be measured in the audiofrequency range.

 

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