Short circuit protection arrangement for an output buffer of an

Details Short circuit protection arrangement for an output buffer of an Short circuit protection arrangement for an output buffer of an

1997-03-19

1999-10-19

Gaffin, Jeffrey

Electricity: electrical systems and devices

Safety and protection of systems and devices

With specific current responsive fault sensor

361 98, H02H 300

Patent

active

059699264

ABSTRACT:
The current flowing in an output field effect transistor is sensed by a parallel circuit arrangement which derives a sensed current representing the current flowing in the output transistor. The parallel circuit arrangement comprises series-connected CMOS transistors which are connected together in order to derive a current output which is representative of the load current through the output transistor. In a short circuit protected output buffer, the sensed current is compared with a reference current and if it exceeds the reference current the amplitude of the drive signal to the output transistor is reduced.

REFERENCES:
patent: 4884165 (1989-11-01), Kong et al.
patent: 5256914 (1993-10-01), Boomer

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