Inrush current start-up circuit for a television receiver...

Details Inrush current start-up circuit for a television receiver... Inrush current start-up circuit for a television receiver...

H - Electricity

04

N

350/101

H04N 3/18 (2006.01)

Patent

CA 1101117

RCA 71,823 INRUSH CURRENT START-UP CIRCUIT FOR A TELEVISION RECEIVER INCLUDING A START-UP DECOUPLING CIRCUIT Abstract Of The Disclosure A start-up circuit for a television receiver includes a circuit for rectifying the AC line voltage and a filter for providing a smoothed DC voltage. When the receiver is turned on, an initial interval exists in which an inrush current flows into the filter. A winding, magnetically coupled to an inductor in the path of the inrush current, develops an alternating current potential during the initial interval. This potential is rectified and provides a start-up operating voltage for the television receiver load circuits. During the steady state interval, a second circuit provides the operating voltage, and a third circuit couples to the winding a voltage which varies in value from the initial interval to the steady state interval in a manner which decouples the alternating current potential from the load circuits during the entirety of the steady state interval. - 1 -

309361

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