Voltage detecting circuit

Details Voltage detecting circuit Voltage detecting circuit

1982-07-06

1985-06-04

Zazworsky, John

Electrical transmission or interconnection systems

Personnel safety or limit control features

Interlock

307360, 307362, H03K 5153, H03K 524

Patent

active

045216967

ABSTRACT:
A voltage detecting circuit is disclosed having a first field effect transistor of a first type coupled in series with a second field effect transistor of a second type between a first supply voltage node and an input node, with the current channel regions coupled to the same node as the sources thereof, and the gates thereof coupled to a second supply voltage node. If the on resistance of the second transistor is significantly greater than that of the first transistor, the output node, formed by the common drains of the transistors, will be substantially the first supply voltage when the input signal is absent, and the voltage of the input signal signal when the latter is present.

REFERENCES:
patent: 3936676 (1976-02-01), Fujita
patent: 4045688 (1977-08-01), Stewart
patent: 4348596 (1982-09-01), Atherton et al.

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