Abstract: A standby power supply arrangement comprises a transistor with its emitter coupled to one pole of a standby battery and its collector coupled to a load. The transistor base is coupled to the other pole of the battery by way of a threshold device. When the battery voltage falls below a given limit, the threshold device no longer conducts, causing the transistor to cease to conduct power to the load.

Abstract: In a power supply for a remote controlled television receiver, a bridge rectifier includes first and second unidirectional current conducting devices, an output terminal, a current return terminal and two input terminals. A remote control circuit generates an on/off command signal. A source of alternating voltage available during both states of the command signal is coupled between the two input terminals. A first direct voltage is developed between the output and current return terminals during both the on and the off states of the command signal upon alternate conduction of the two unidirectional current conducting devices. A first power supply is coupled between the bridge rectifier output and current return terminals and is responsive to the command signal for developing an operating potential from the first direct voltage only during the on-state of the command signal. A load circuit is energized by the operating potential to draw power from the bridge rectifier output terminal.