Low leakage fuse blown detection circuit

Details Low leakage fuse blown detection circuit Low leakage fuse blown detection circuit

1993-03-31

1995-01-03

Pellinen, A. D.

Electrical transmission or interconnection systems

Switching systems

Condition responsive

323367, 323365, 324550, 361103, 361104, 361 88, H02H 324, H05B 4129

Patent

active

053789318

ABSTRACT:
A fuse blown detection circuit for use in conjunction with the control transistor output circuits of a programmable controller which provides low leakage after the fuse is blown. The detection circuit comprises a pair of voltage dividers and a diagnostic triggering device forming an H-bridge network connected across the terminals of the fuse and a blocking diode. When the fuse is blown the voltage levels defined by the dividers change to activate the trigger device and enable a diagnostic signal indicative of the fuse blown condition while the blocking diode prevents current flow back through the control transistor and output circuit.

REFERENCES:
patent: 4918562 (1990-04-01), Pulizzi et al.
patent: 4943886 (1990-07-01), Quazi

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