| 摘要 |
PURPOSE:To reduce the difference in the operation start period of an oscillator and the stabilize the operation of the oscillation device by providing the 2nd oscillator which is supplied with a source voltage through the operation of the 1st oscillator, and setting the oscillation start source voltage of the 1st oscillator higher than the oscillation start source voltage of the 2nd oscillator. CONSTITUTION:A horizontal oscillator 2 as the 1st oscillator of the oscillation device of a TV receiver is driven with the source voltage VCC1 at a power source terminal and a flyback transformer 6 is operated with the output of a horizontal output circuit 4. The voltage from the transoformer 6 is rectified and smoothed to obtain a DC voltage B3 and a vertical oscillator 13 as the 2nd oscillator is driven with the DC voltage B3 to supply its oscillation output to a vertical deflecting coil 17. An operating voltage control circuit 18 is provided between the power source terminal 1 and oscillator 2. This circuit 18 sets the oscillation start voltage V0 of the oscillator 2 higher than the oscillation start voltage VS of the oscillator 13 to reduce the voltage difference between voltages VCC1 and VCC2, and the difference in the operation start period is reduced to stabilize the oscillating operation.
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