Fairchild Semiconductor Corporation

Semiconductor Components Industries, LLC

Other

Bruce G Armstrong

Riley Beck

Rishi Pratap Singh

Sanath Kumar Kondur Surya Kumar

Charles L Vinn

Alexander H Craig

Implementations of ground fault circuit interrupter (GFCI) self-test circuits may include: a current transformer coupled to a controller, a silicon controlled rectifier (SCR) test loop coupled to the controller, a ground fault test loop coupled to the controller, and a solenoid coupled to the controller. The SCR test loop may be configured to conduct an SCR self-test during a first half wave portion of a phase and the ground fault test loop may be configured to conduct a ground fault self-test during a second half wave portion of a phase. An SCR may be configured to activate the solenoid to deny power to a load upon one of the SCR self-test or the ground fault self-test being identified as failing.

Ground fault interrupter self test circuits and related methods

This document discusses, among other things, a self-test (ST) ground fault circuit interrupter (GFCI) monitor configured to generate a simulated ground fault starting in a first half-cycle of a first cycle of AC power and extending into a second half-cycle of the first cycle of AC power, wherein the first half-cycle of the first cycle of AC power precedes the second half-cycle of the first cycle of AC power. Further, the ST GFCI monitor can detect a response to the simulated ground fault.

Ground fault circuit interrupter (GFCI) monitor

This document discloses, among other things, apparatus and methods for dimmer control. In an apparatus example, a circuit can include an input configured to receive a control signal, a controller configured to modulate a pulse width of a pulse train using the control signal when the controller is enabled, an output configured to provide the pulse train to a driver, and first and second current limit detectors configured to receive load current information of the driver and to terminate an active pulse of the controller when a value of the load current information exceeds a threshold.

Dimmer control with soft start over-current protection

A ground fault circuit interrupter (GFCI) includes a GFCI controller configured to detect for ground faults and to periodically perform a self test. The self test may be performed during a positive half cycle of an AC line voltage coupled to a load by the GFCI. The self test may include testing of a critical component of the GFCI without opening load contacts coupling the AC line voltage to the load. The self test may further include testing of monitoring coils in the GFCI.

Ground fault circuit interrupter with self test

An audio amplifier that does not exhibit a 'pop' during a change-of-state such as being turned on. The popless amplifier includes an operational amplifier to power a speaker, a circuit to prevent the application of an output voltage from the operational amplifier to the speaker for a selectable period of time and a circuit to charge the output of the operational amplifier to a selectable mid-rail voltage during the time a voltage from the operational amplifier is prevented from reaching the speaker.

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San Mateo, CA, United States of America

Bruce G Armstrong