Its synchronous phase-shift function is produced by microcomputer auto-matically, the VFC and counter-gate act as a PSD, and fhe counter combin-ing with real time processing of smoothing act as the LPF.

• 其同步移相控制由微处理器自动产生,相敏检波(PSD)的功能由V/F转换结构(VFC和计数门)来执行,低通滤波(LPF)的作用由计数器与实时平滑处理来实现。 从而可恢复掩没在非相干噪声中的单次信号,并取得肯定的S/N改善。