Power supply switching circuit

Details Power supply switching circuit Power supply switching circuit

1984-07-11

1986-01-21

Wong, Peter S.

Electricity: power supply or regulation systems

Self-regulating

Using a three or more terminal semiconductive device as the...

323351, 307297, 307304, G05F 320

Patent

active

045659605

ABSTRACT:
A power supply switching circuit for supplying a pair of power supply voltages different in level, such as programming voltage V.sub.pp and reference voltage V.sub.cc, selectively is provided. The circuit includes a plurality of P-channel and N-channel MOS transistors which are appropriately connected such that no leakage or reverse current is produced even if the voltage at the V.sub.pp terminal becomes lower than V.sub.cc.

REFERENCES:
patent: 4423492 (1983-12-01), Yoshida
patent: 4428071 (1984-01-01), Wilmsmeyer

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