Current window detection circuit

Details Current window detection circuit Current window detection circuit

1992-07-23

1993-06-29

DeBoer, Todd E.

Electricity: electrical systems and devices

Safety and protection of systems and devices

Ground fault protection

361 93, 323316, H02H 326

Patent

active

052240070

ABSTRACT:
A ground fault interrupt circuit with an improved current window detector. The current window detector works by first rectifying the input current in a pair of current mirrors connected in back to back fashion in the feedback path of the input amplifier. The rectified current triggers an output when the rectified current exceeds a predetermined threshold.

REFERENCES:
patent: 3953766 (1976-04-01), Howell et al.
patent: 4114089 (1978-09-01), Ahmed
patent: 4180841 (1979-12-01), Engel
patent: 4965510 (1990-10-01), Kriedt et al.
patent: 5057792 (1991-10-01), Gay
Data Sheet "LM1851 Ground Fault Interrupter", Linear Integrated Circuits 1989, Raytheon Company Semiconductor Division, Mountain View, Calif.

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