Power supply switching circuit

Details Power supply switching circuit Power supply switching circuit

1985-04-19

1988-06-28

Shoop, Jr., William M.

Electrical transmission or interconnection systems

Plural supply circuits or sources

Substitute or emergency source

307 66, 365229, H02J 700

Patent

active

047541601

ABSTRACT:
A power supply switching circuit is disclosed which provides for automatically switching an electrical circuit load from a main power source to an auxiliary power source, yet maintains the two power sources isolated from each other. The power supply switching circuit is readily integrated with its electrical load to form a monolithic integrated circuit. A pair of MOSFETs provides alternate connections of the load to the respective power sources. The circuit effectively connects the gate and source of the appropriate MOSFET across the available power source and thus assures the maximum turn-on voltage is applied to the MOSFET.

REFERENCES:
patent: 4288865 (1981-09-01), Graham
patent: 4463270 (1984-07-01), Gordon
patent: 4492876 (1985-01-01), Colbert et al.

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