Overcurrent detection circuit

Details Overcurrent detection circuit Overcurrent detection circuit

1998-06-04

1999-04-06

Medley, Sally C.

Electricity: electrical systems and devices

Safety and protection of systems and devices

With specific current responsive fault sensor

361 18, 361 57, H02H 308

Patent

active

058926470

ABSTRACT:
An overcurrent detection circuit detects an overcurrent in a current path accurately and sensitively. The overcurrent detection circuit includes a first resistance element connected between first input and output terminals of the current path; a second resistance element connected to the first input terminal; a differential amplifying device connected to the first output terminal and the second resistance element; and a proportional-current output device connected to the second resistance element in series and to an output terminal of the differential amplifying device. The proportional-current output device receives an output signal from the differential amplifying device to output a proportional current with a magnitude proportional to a current flowing through the first resistance element. A current monitor device is connected to the proportional-current output device for monitoring the proportional current outputted from the proportional-current output device to detect an overcurrent flowing through the first resistance element.

REFERENCES:
patent: 5233287 (1993-08-01), Lenk

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