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本文提出一种能进一步提高接收机行同步电路抗干扰性能的混合式键控电路,该电路利用行逆程脉冲从全电视信号中单独选出行同步头,使干扰不致影响AGC和行同步,并保证接收机同步稳定,AFPC电路引入范围不变。
This paper presents a hybrid keying circuit that can further improve the anti-jamming performance of the receiver line synchronization circuit. The circuit uses line back-pulse to select the line synchronization head from the full TV signal independently so that the interference does not affect the AGC and line synchronization. And ensure the receiver synchronization and stability, AFPC circuit into the same range.