Electronic circuit arrangement having polarity reversal protecti

Details Electronic circuit arrangement having polarity reversal protecti Electronic circuit arrangement having polarity reversal protecti

1997-02-26

1998-06-09

Gaffin, Jeffrey A.

Electricity: electrical systems and devices

Safety and protection of systems and devices

Reverse phase responsive

361 82, 361 84, H02H 300

Patent

active

057644659

ABSTRACT:
A MOS field-effect transistor (T2) is provided in conjunction with transistors (T1 and T3) as polarity reversal protection in an electrical circuit arrangement (1). Polarity reversal protection of this type is realized by the drain-source path of the transistor (T2). Transistors (T1 and T3) form a comparator. If the drain-source voltage of the transistor (T2) becomes negative then the transistor (T3) switches on. This, in turn has the effect of switching off the transistor (T2) thereby providing polarity reversal protection. The electronic circuit arrangement (1) configured according to the invention can advantageously be used in an airbag system (10).

REFERENCES:
patent: 4423456 (1983-12-01), Zaidenweber
National Semiconductor Corp., "Voltage Regulator Handbook", 1981, pp. 7-39.

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