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本文着重分析了美国Ampex公司生产的TBC-2B存储器中写入定时问题。第一部分是如何从重放信号中获得定时基准,形成色同步过零点脉冲。后二部分分析了在压控振荡器(VCO)对时基误差进行第一级校正和在带行比较器线路板作第二级校正的方法和过程。最后给出了信号处理的流程图和与之对应的波形。
This article focuses on analyzing the write timing issues in TBC-2B memory produced by Ampex in the United States. The first part is how to get the timing reference from the replay signal to form the burst pulse of color synchronization. The latter two sections analyze the first-order correction of the time-base error in the VCO and the second-order correction in the line comparator circuit board. Finally, the signal processing flow chart and the corresponding waveform.