Programmable protection circuit and its monolithic manufacturing

Details Programmable protection circuit and its monolithic manufacturing Programmable protection circuit and its monolithic manufacturing

1991-12-06

1993-12-28

Pellinen, A. D.

Electricity: electrical systems and devices

Safety and protection of systems and devices

Load shunting by fault responsive means

361 91, 361111, 361119, H02H 320, H02H 904

Patent

active

052745244

ABSTRACT:
A programmable protection circuit comprises three identical units connected between a common point (C) and a first conductor (A), a second conductor (B) and ground (M). Each unit comprises the anti-parallel arrangement of a thyristor (T) and a diode (D), a bipolar transistor (TR) being connected between the gate and anode of the thyristor, the anodes of the thyristors being connected to the common point and the base terminal of each unit constituting a programmation terminal and being connected to a device defining a voltage threshold. Each device defining a voltage threshold is a zener diode (Z1, Z2, Z3) connected between each base terminal and the common point.

REFERENCES:
patent: 3600634 (1971-08-01), Muench
patent: 4282555 (1981-08-01), Svedberg
patent: 5003588 (1991-03-01), Wingbrath

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