On/off switch control circuitry for television

Details On/off switch control circuitry for television On/off switch control circuitry for television

H - Electricity

04

N

350/109

H04N 3/185 (2006.01)

Patent

CA 1309171

Abstract A control circuit of a television receiver power supply is constructed using a plurality of transistors operating in a common base configuration. The base electrodes of each of the transistors is coupled to a common conductor that maintains the collector currents in the transistors temperature compensated over a wide range of operating temperatures during normal operation power up mode of the receiver. In a standby mode of the receiver, power dissipation in the transistors is reduced by applying an on/off control signal to the common conductor that prevents the flow of the collector currents in each of the transistors. Consequently, the supply current requirement of the control circuit is reduced during the standby mode.

615946

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