On/off control circuitry for television

Abstract From the Canadian patent

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 …