Electric lamp and discharge devices: systems – Cathode ray tube circuits – Pulse storing
Patent
1979-11-30
1981-04-14
LaRoche, Eugene R.
Electric lamp and discharge devices: systems
Cathode ray tube circuits
Pulse storing
361150, H04N 929
Patent
active
042622328
ABSTRACT:
A degaussing network of a remote controlled color television receiver is energized by a remote-responsive power supply rather than by the contact closure of a mechanical or electromechanical switch. The power supply includes a series-pass semiconductor element for developing a direct current voltage at an output terminal of the power supply derived from a source of alternating current voltage coupled across two input terminals. The regulator control circuit for the semiconductor element is responsive to the state of an on/off command signal. The power supply operates during the on-state of the command signal to provide the direct current voltage at the output terminal. The power supply regulator control circuit maintains the semiconductor element nonconductive in the off-state. The degaussing network, including a degaussing winding and a thermistor, is coupled to the output terminal of the power supply. First and second diodes in conjunction with corresponding diodes of the power supply rectifier circuit guide current from the AC source through the regulator semiconductor element in alternate directions within the degaussing winding in order to generate the required alternating degaussing magnetic flux. When the on-state of the command signal is applied to the regulator control circuit to initiate conduction of the semiconductor element, degaussing current begins to flow in the degaussing winding. The degaussing current is substantially reduced after the thermistor heats up.
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patent: 3404307 (1968-10-01), Hayden
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patent: 3582721 (1971-06-01), Van Hoorn et al.
patent: 4164775 (1979-08-01), Slegers
Laks Joseph J.
LaRoche Eugene R.
Rasmussen Paul J.
RCA Corp.
Whitacre Eugene M.
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