| 摘要 |
A horizontal oscillation circuit which prevents damage of horizontal output transistors due to the rapid increase of horizontal deflection current at varying states of horizontal scan frequency or at the turning-on state of the power source. The horizontal oscillation circuit is provided with a speed up circuit which rapidly increases the control voltage supplied to a control voltage terminal of a voltage controlled oscillator. This provides increased speed of the oscillation frequency of the voltage controlled oscillator which does not slow in comparison to increasing speed of power source voltage. Consequently, the horizontal deflection current remains nearly constant, even at varying states of the horizontal scan frequency of the turning-on state of the power source, and damage to horizontal output transistors is avoided.
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