A high performance digital synchronous noise filter

A filter for rejecting periodic noise, such as that arising from the mains power supply, is described. With a stationary noise signal, the filter achieves a rejection ratio of 127 dB. With the somewhat variable mains, rejection ratios obtained in practice are typically 60 dB or better. (Original abs...

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Bibliographic Details
Published in:Measurement science & technology 1994-05, Vol.5 (5), p.503-508, Article 503
Main Authors: Small, G W, Dencher, P R, Leslie, K E, Sloggett, G J
Format: Article
Language:English
Subjects:
Applied sciences
Circuit properties
Electric, optical and optoelectronic circuits
Electronic circuits
Electronics
Exact sciences and technology
Frequency filters
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Description
Summary:A filter for rejecting periodic noise, such as that arising from the mains power supply, is described. With a stationary noise signal, the filter achieves a rejection ratio of 127 dB. With the somewhat variable mains, rejection ratios obtained in practice are typically 60 dB or better. (Original abstract-amended)
ISSN:0957-0233
1361-6501
DOI:10.1088/0957-0233/5/5/006