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Primary Examiner: Miller, Jr., Stanley D.
Assistant Examiner: Anagnos, Larry N.
Attorney: Christoffersen; H., Cohen; S.

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Title: Keyed comparator

Abstract: In the "on" condition of the circuit, a current mirror supplies a constant current to a comparator, a voltage divider circuit supplies a reference voltage to one input terminal of the comparator, and the input voltage to be compared to the reference voltage is applied to the other input terminal of the comparator. In the "off" condition of the circuit, the current mirror, the comparator and the voltage divider circuit are all cut off to reduce to substantially zero the power consumption of the circuit.

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Inventors: Morgan, David Keith (Flemington, NJ, US)
Heuner, Robert Charles (Bound Brook, NJ, US)

Application Number: 492134
Filing Date: 1974-07-26
Publication_date: 1976-03-09
Assignee: RCA Corporation (New York, NY)
Primary Class(es): 327/89 323/315, 327/535, 330/288, 368/241, 968/928, 968/DIG1
Other Classes:
US Patent Ref:

3644838	Feb, 1972	Graf	330/35.
3787757	Jan, 1974	Sheng	323/4.
3813595	May, 1974	Sheng	323/22.
3852679	Dec, 1974	Schade	330/35.
3857047	Dec, 1974	Knight	330/30.
3863169	Jan, 1975	Knight	330/22.

Other Refs: Other References: Hession et al., "Field-Effect Transistor Detector Amplifier Cell; " IBM Tech. Discl. Bull.; Vol. 13, No. 9, p. 2822; 2/1971.
Jacquart et al., "Operational Amplifier; " IBM Tech. Discl. Bull.; Vol. 14, No. 9, p. 2723; 2/1972.
Electronic Design, 2/15/1973, Vol. 21, No. 4, p. A9.