Apparatus for detecting DC content of an AC waveform

Details Apparatus for detecting DC content of an AC waveform Apparatus for detecting DC content of an AC waveform

1993-06-28

1995-10-17

Sikes, William L.

Miscellaneous active electrical nonlinear devices, circuits, and

Specific signal discriminating without subsequent control

By amplitude

327 72, 327558, H03K 5153, H03K 500

Patent

active

054594170

ABSTRACT:
A circuit for monitoring the DC content of an AC waveform includes a differential amplifier having one input connected to the AC waveform and the other input connected to a capacitive-coupled network that eliminates any DC component in the AC waveform at the frequency being monitored. Additional circuitry is required to cancel any phase shift and reactance of the coupling capacitor. The output of the differential amplifier is a signal which represents the amplitude and polarity of the DC content.

REFERENCES:
patent: 3696252 (1972-10-01), Chapman
patent: 3867702 (1975-02-01), Torpie
patent: 4158818 (1979-06-01), Lerner
patent: 4243940 (1981-01-01), Ruof
patent: 4835482 (1989-05-01), Tamakoshi
IBM Technical Disclosure Bulletin, vol. 4 No. 12, May 1962 p. 105.
IEEE Transactions on Circuits and Systems, vol. CAS-30 No. 7, Jul. 1983 pp. 474-488.

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