Abstract:
A transformerless coupled driver-to-output stage deflection circuit in which initial driver stage operating current is obtained from a relatively high voltage receiver power supply to initiate operation of the deflection circuit. A relatively low voltage supply is derived from the deflection output stage and coupled to the driver stage such that the greater portion of the driver stage operating current is supplied by the relatively low voltage supply during normal operation.
Abstract:
A single pole switching arrangement maintains the filament of the cathode-ray kinescope of a television receiver at full power when the set is turned to an ''''ON'''' condition and connected to an alternating current power source, but operates the filament at half power when the set is turned to its ''''OFF'''' state. When the receiver is connected to a direct current power source, on the other hand, no filament power is used when the single pole arrangement switches the set to its ''''OFF'''' condition, thereby extending the number of viewing hours between direct current battery re-charges, for example. Switching the single pole arrangement to turn the receiver to its ''''ON'''' state when the set is connected to the direct current source once again applies full power to the kinescope filament.