Keyed comparator

Details Keyed comparator Keyed comparator

1975-10-06

1977-01-18

Miller, Jr., Stanley D.

Electrical transmission or interconnection systems

Nonlinear reactor systems

Parametrons

307297, 330 22, 330 30D, 330 35, 58 23A, H03K 520, H03K 112, H03F 304

Patent

active

040041581

ABSTRACT:
In the "on" condition of the circuit, a current mirror supplies a bias 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. The comparator employs regenerative feedback to increase switching speed and gain and minimize the offset voltage. The bias current amplitude is automatically adjusted in response to reference voltage changes, thereby maintaining the bias current level at the value desired for a particular reference voltage.

REFERENCES:
patent: 3278761 (1966-10-01), Goyer
patent: 3852679 (1974-12-01), Schade, Jr.
patent: 3857047 (1974-12-01), Knight
patent: 3863080 (1975-01-01), Steckler
patent: 3863169 (1975-01-01), Knight
patent: 3872323 (1975-03-01), Frederiksen et al.
patent: 3876955 (1975-04-01), Ahmed
"Electrical Amplifier with Input-Bias Network", by Hellwarth IBM Tech. Discl. Bull., pp. 966-967, vol. 14, No. 3, Aug. 1971.

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