Comparator circuit having multi-functions

Details Comparator circuit having multi-functions Comparator circuit having multi-functions

1977-08-29

1979-12-04

Zazworsky, John

Electrical transmission or interconnection systems

Personnel safety or limit control features

Interlock

307360, 328147, H03K 520

Patent

active

041773942

ABSTRACT:
A comparator circuit comprises first and second transistors having bases for receiving first and second input voltages, respectively, and a third transistor having a base for receiving a third input voltage to be compared with the first and second input voltages. The first, second and third transistors have respective emitters connected in common to a constant current source. Switching means is provided for selectively supplying a potential to the base of the first transistor thereby to turn off the same and is connected to a switch control means, to produce the collector potential of the third transistor or a corresponding potential.

REFERENCES:
patent: 3396282 (1968-08-01), Sheng et al.
patent: 3456127 (1969-07-01), Gray et al.
patent: 3633045 (1972-01-01), Nordling

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