Write clock generator for time base corrector including frequency fluctuation and write clock difference signal reduction

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.