Fusing and detection circuit

Details Fusing and detection circuit Fusing and detection circuit

1988-03-02

1990-06-19

Zazworsky, John

Electrical transmission or interconnection systems

Personnel safety or limit control features

Interlock

324110, 328146, 365 96, 357 51, H03K 5153

Patent

active

049356453

ABSTRACT:
A fusing and detection circuit includes a diode fusing element which is coupled to a fuse input terminal of an integrated circuit. Upon the application of the proper voltage at the fuse input terminal, the fuse element is blown, causing the diode to become a low impedance resistor. The detection circuitry senses whether the fuse has been blown or not and provides a lock or unlock indication at an output terminal. The fusing and detection circuit is designed to thwart attempts to change the lock status to an unlock status after the fuse has been blown.

REFERENCES:
patent: 4104546 (1978-08-01), Seiler
patent: 4121122 (1978-10-01), Pokrandt
patent: 4287569 (1981-09-01), Fukushima

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