Short circuit protection circuit

Details Short circuit protection circuit Short circuit protection circuit

1979-12-27

1981-09-22

Miller, J. D.

Electricity: electrical systems and devices

Safety and protection of systems and devices

With specific current responsive fault sensor

361 92, H02H 902

Patent

active

042913578

ABSTRACT:
A protection circuit is provided in which the output voltage is sensed and the output device is shut-off for protection when the output voltage falls below a predetermined trip voltage. The monolithic integrated circuit includes a voltage shifting circuit for transferring the output voltage to a biasing circuit which biases a switching circuit which turns the line driver off, when an overload or short circuit causes a voltage drop below a predetermined trip voltage. The protection circuit is disabled during start-up or signal rise time by splitting the input signal into two separate paths in which the signals have different delays. The shorter delay allowing the input signal to rise and to appear on the output line before the longer delay input signal rises enabling the protection circuit.

REFERENCES:
patent: 3160767 (1964-12-01), Tindall
patent: 3748569 (1973-07-01), Frank et al.
patent: 3753078 (1973-08-01), Hedel

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