Power supply switching circuit

Details Power supply switching circuit Power supply switching circuit

1997-03-31

1999-10-12

Kim, Jung Ho

Miscellaneous active electrical nonlinear devices, circuits, and

Specific identifiable device, circuit, or system

With specific source of supply or bias voltage

327434, 327534, 365226, H03K 301

Patent

active

059660430

ABSTRACT:
A power supply switching circuit comprises first and second PMOSFETs connected in series between a writing high voltage and an output terminal in the named order, and third and fourth PMOSFETs connected in series between a reading voltage and the output terminal in the named order. A substrate potential of the first PMOSFET is connected to the writing high voltage, and a substrate potential of the third PMOSFET is connected to the reading voltage. A substrate potential of the second and fourth PMOSFETs are connected in common to a substrate potential control circuit which is configured to selectively supply either the writing high voltage or the reading voltage to the common connected sub.about.t rate potential of the second and fourth PMOSFETs.

REFERENCES:
patent: 4893275 (1990-01-01), Tanaka et al.
patent: 5179297 (1993-01-01), Hsueh et al.
patent: 5260643 (1993-11-01), Sandhu
patent: 5592430 (1997-01-01), Ohtsuki
patent: 5663917 (1997-09-01), Oka et al.

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