Fast electronic comparator

Details Fast electronic comparator Fast electronic comparator

1992-03-24

1994-02-22

Zazworsky, John

Electrical transmission or interconnection systems

Personnel safety or limit control features

Interlock

307362, 307491, 307494, 307568, H03K 5153, H03K 524, H03K 508

Patent

active

052890546

ABSTRACT:
An MOS comparator circuit for sensing small voltage differences between two inputs is disclosed. The response time of the comparator circuit is improved by providing both a differential amplifier circuit and an output circuit with faster response times. The response time of the differential comparator circuit is improved by preventing the current-mirror from turning off. The response time of the output circuit is improved by limiting the input voltage to the inverter of the output circuit to a range of slightly greater than the balance-point voltage and slightly less than the balance-point voltage of the inverter.
The difference between the response of the comparator circuit to large amplitude input voltages and small amplitude input voltages is also improved.

REFERENCES:
patent: 4209713 (1980-06-01), Satou et al.
patent: 4223394 (1980-09-01), Pathak et al.
patent: 4723082 (1988-02-01), Asano et al.
patent: 4835417 (1989-05-01), Kousaka et al.
patent: 4935649 (1990-06-01), Bloker
patent: 5182468 (1993-01-01), Erdelyi et al.

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