Sync signal generator with memorization of phase d

专利名称：Sync signal generator with memorization of

phase detection output

发明人：Tsuneo Mikado申请号：US05/783773申请日：19770401公开号：US04122488A公开日：19781024

摘要：A television synchronizing signal generator includes a synchronizing signalseparator circuit for separating a synchronizing signal from a video signal, an oscillatorthe oscillatory frequency of which is controllable, a phase discriminator for discriminatingoutputs of the synchronizing signal separator circuit and the oscillator, a memory circuitfor memorizing an output of the phase discriminator, a switching circuit for applyingalternatively the output of the phase discriminator and the output of the memory as acontrol signal to the oscillator to control the oscillatory frequency thereof, and an inputstate detector for detecting the input amplitude and noise state of the video signal suchthat the switching action of the switching circuit is controlled in accordance with theoutput of the input state detector. With such a generator, a stable picture can beobtained in a television receiver, even although the received video signal is temporarilyabnormal.

申请人：NIPPON TELEVISION INDUSTRY CORPORATION

代理机构：Woodcock, Washburn, Kurtz & Mackiewicz

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