Guarded electronic circuit from reversal of its supply battery p

Details Guarded electronic circuit from reversal of its supply battery p Guarded electronic circuit from reversal of its supply battery p

1989-06-23

1990-09-18

Jennings, Derek S.

Electricity: electrical systems and devices

Safety and protection of systems and devices

With specific quantity comparison means

307127, H02M 312

Patent

active

049582518

ABSTRACT:
A guarded electronic circuit from reversal of its supply battery polarity comprises a MOS power transistor connected between one pole of the battery and ground, to drive an electric load to ground, and a second, protection MOS transistor connected between the pole and the first transistor; said transistors, which are both provided with respective inherent diodes between the source and the drain, have their related drain electrodes connected together. The resulting circuit is self-protected against possible reversal of the polarity of the battery to which it is connected, and can protect the electric load driven thereby.

REFERENCES:
patent: 4839769 (1989-06-01), Soo et al.

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