Thrush current start-up circuit for a television receiver includ

Details Thrush current start-up circuit for a television receiver includ Thrush current start-up circuit for a television receiver includ

1977-08-22

1978-09-05

Martin, John C.

Facsimile and static presentation processing

Facsimile

Specific signal processing circuitry

315411, H04N 318

Patent

active

041124650

ABSTRACT:
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.

REFERENCES:
patent: 3891892 (1975-06-01), Bohringer
patent: 3908159 (1975-09-01), Griffey
patent: 3947632 (1976-03-01), Giger et al.

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