300路载波主群信号编码设备中的高速数字电路,包括下述各部分:发送侧的自然二进码/对称二进码的变换、奇偶校验编码、帧同步码型和对告的发生、汇合电路、输出电路和位脉冲的发生等;接收侧的输入电路、对称二进码/自然二进码的变换、奇偶校价译码(误码检出)、帧同步及对告码的检出、PCM中断监视和位脉冲的发生等。有关帧同步和对告电路部分另有专文论述。本文只对其余部分作一说明。 High-speed digital circuit in 300-channel carrier main group signal coding device includes the following parts: transformation of natural binary code / symmetric binary code on transmit side, parity code, frame synchronization code pattern and the occurrence of advertisement, Confluence circuit, output circuit and occurrence of bit pulse, etc .; input circuit on receiving side, conversion of symmetric binary code / natural binary code, parity decoding (error detection), frame synchronization, Out, PCM interrupt monitoring and the occurrence of bit pulse and so on. The relevant part of the frame synchronization and reporting circuit specifically discussed. This article only gives a description of the rest.