| 摘要 |
PURPOSE:To obtain a stable reproduction pattern without distortion even under a wrong reception condition by providing a voltage controlled oscillator circuit outputting a timing pulse signal with a stable period and whose phase is the same as a horizontal synchronizing signal from a timing pulse generating circuit to a horizontal output deflection circuit to the horizontal synchronizing circuit. CONSTITUTION:A pulse outputted from a horizontal oscillation circuit 4 is inputted to a pulse oscillation circuit 7, from which a waveform pulse is outputted and on the other hand, a timing pulse generating circuit 11 inputs a waveform pulse to a comparator 8, from which the pulse is outputted to a loop filter 9. An output voltage of the filter 9 is inputted to a voltage controlled oscillator circuit 10. The output of the voltage controlled oscillator circuit 10 is given to the timing generating circuit 11, in which a horizontal synchronizing pulse and a vertical synchronizing pulse are generated, the vertical synchronizing signal is fed to a vertical synchronizing circuit and the horizontal synchronizing pulse is fed to a horizontal drive circuit 5. The phase shift with respect to the stable horizontal synchronizing signal is corrected by using the horizontal drive pulse generated in this way. Thus, the picture without distortion is obtained. |
