A Time Constant Meter for Tuning Forks and Other High Q Devices
作者:
Charles T. Morrow,
期刊:
The Journal of the Acoustical Society of America
(AIP Available online 1952)
卷期:
Volume 24,
issue 1
页码: 40-41
ISSN:0001-4966
年代: 1952
DOI:10.1121/1.1906844
出版商: Acoustical Society of America
数据来源: AIP
摘要:
The time constant meter described operates on the principle that differentiation of an exponentially decaying rectified envelope decreases it in inverse proportion to the time constant and reverses its sign. Hence, it is possible to obtain a null by balancing the differentiated signal against a portion of the original. The circuit is simple, requiring only one amplifier tube and a tuning eye.
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