Protection circuit for battery feed circuit

Details Protection circuit for battery feed circuit Protection circuit for battery feed circuit

1988-06-16

1989-08-29

Jennings, Derek S.

Electricity: electrical systems and devices

Safety and protection of systems and devices

Load shunting by fault responsive means

361 42, 361 91, 361111, 361119, 379412, H02H 320

Patent

active

048623091

ABSTRACT:
A protection circuit for a battery feed circuit used in a switching system. The protection circuit is comprised of: a supervising circuit for detecting an abnormal current flowing through a battery feed resistor; and a voltage limiting circuit for clamping a voltage across the battery feed resistor when the abnormal current is detected. Further, a control circuit is employed for stopping an operational amplifier, which is a component of a conventional battery feed circuit, when the abnormal current is detected.

REFERENCES:
patent: 4495536 (1985-01-01), Bynum
patent: 4715058 (1987-12-01), Lechner et al.
patent: 4772979 (1988-09-01), Arras

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