Differential line driver with short circuit protection

Details Differential line driver with short circuit protection Differential line driver with short circuit protection

1988-11-18

1989-11-28

Jennings, Derek S.

Electricity: electrical systems and devices

Safety and protection of systems and devices

With specific current responsive fault sensor

361101, 3072964, 3072965, 370207P, H02H 300

Patent

active

048841650

ABSTRACT:
A short-circuit protected line driver circuit is particularly adapted for use in a differential line driver system, where one line driver circuit provides a true output signal and another line driver circuit provides a complementary false output signal. A short-circuit is sensed by measuring current through a secondary pull-up transistor and disabling a primary pull-up transistor if a short-circuit fault occurs which exceeds a predetermined current level for a predetermined time.

REFERENCES:
patent: 3845405 (1974-10-01), Leidich
patent: 4404478 (1983-09-01), Fox

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