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WRITE CLOCK GENERATOR FOR TIME BASE CORRECTOR INCLUDING FREQUENCY FLUCTUATION AND WRITE CLOCK DIFFERENCE SIGNAL REDUCTION
WRITE CLOCK GENERATOR FOR TIME BASE CORRECTOR INCLUDING FREQUENCY FLUCTUATION AND WRITE CLOCK DIFFERENCE SIGNAL REDUCTION
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机译:用于时基校正的写时钟发生器,包括频率波动和写时钟差信号的减少
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摘要
A write clock generator for a time base corrector incorporated in a video tape recorder can generate a write clock signal including accurate phase and frequency fluctuation information on a reproduced video signal in spite of a simple circuit configuration. A write clock signal is generated from a VCO oscillated in response to a reproduced burst signal, and further the VCO is so controlled on the basis of frequency difference between the oscillated write clock signal and a frequency fluctuation signal such that the frequency difference may be eliminated. The frequency fluctuation signal is generated in response to a horizontal synchronizing signal so as to include time base fluctuations in a reproduced video signal.
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