Voltage detection circuit using threshold as reference voltage f

Details Voltage detection circuit using threshold as reference voltage f Voltage detection circuit using threshold as reference voltage f

1983-01-24

1986-08-19

Zazworsky, John

Electrical transmission or interconnection systems

Personnel safety or limit control features

Interlock

307310, 307296R, H03K 5153

Patent

active

046071741

ABSTRACT:
A voltage detection circuit for comparing an input voltage against a reference voltage, the reference voltage being derived from the threshold voltage of a semiconductor active device which forms a portion of the voltage detection circuit. To make the detection circuit substantially independent of ambient temperature changes, it is constructed as an integrated circuit and includes devices for producing a temperature dependent voltage equal to but of opposite sign to the temperature sensitive voltage component of the reference voltage. The two temperature sensitive voltages cancel each other to thereby permit a temperature independent voltage comparison.

REFERENCES:
patent: 3290520 (1966-12-01), Wennik
patent: 3725675 (1973-04-01), Olsen

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