Comparison circuit

Details Comparison circuit Comparison circuit

1987-07-14

1989-03-21

Zazworsky, John

Electrical transmission or interconnection systems

Personnel safety or limit control features

Interlock

307315, 307491, 307494, H03K 524

Patent

active

048146439

ABSTRACT:
A comparison circuit includes a differential amplifier having first and second input circuits each of which is formed of darlington-connected transistors and which are connected to receive first and second input signals. The comparison circuit further includes an operation mode control circuit for selectively short-circuiting the base-emitter path of each of the first stage bipolar transistors in the first and second input circuits, in response to the first and second input signals.

REFERENCES:
patent: 4404478 (1983-09-01), Rischmuller
patent: 4418290 (1983-11-01), Nagano

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