Potential detecting circuit

Details Potential detecting circuit Potential detecting circuit

1992-08-31

1993-05-04

Sikes, William L.

Electrical transmission or interconnection systems

Personnel safety or limit control features

Interlock

3072964, 3072965, 307350, 307451, 307475, H03K 5153, H03K 190175

Patent

active

052084884

ABSTRACT:
A potential detecting circuit comprises a first MOS transistor of a first conductivity type whose drain receives an input potential that is equal to or lower, in absolute value, than a second potential whose absolute value is higher than that of a first potential, a second MOS transistor of a second conductivity type whose source is connected to the source of the first transistor and gate receives the first potential, a third MOS transistor of the first conductivity type whose source is connected to the second MOS transistor, source receives a reference potential whose absolute value is lower than that of the first potential, and gate receives the first potential, a detecting potential control block for applying to the first MOS transistor a potential varying in accordance with the input potential, and a potential detect output terminal for providing a detected potential, the potential detect output terminal being a junction between the drains of the second and third MOS transistors.

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