Operational amplifier circuit and arc fault circuit...

Details Operational amplifier circuit and arc fault circuit... Operational amplifier circuit and arc fault circuit...

H - Electricity

02

H

H02H 3/16 (2006.01)

Patent

CA 2686175

An operational amplifier circuit is for an arc fault circuit interrupter including a current sensor having a secondary and an envelope detector circuit having an input. The operational amplifier circuit includes a band pass filter having an input structured to be electrically interconnected with the secondary of the current sensor and an output; and a rectifier circuit. The rectifier circuit includes an operational amplifier having an input electrically interconnected with the output of the band pass filter and an output, a half-wave rectifier having an input electrically interconnected with the output of the operational amplifier, an output, and a forward voltage between the input and the output of the half-wave rectifier, the half-wave rectifier output being structured to be electrically interconnected with the input of the envelope detector circuit, and a voltage compensation circuit cooperating with the input and the output of the operational amplifier to compensate for the forward voltage.

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