公开(公告)号：US3731219A

公开(公告)日：1973-05-01

申请号：US3731219D

申请日：1972-06-13

Applicant: INT STANDARD ELECTRIC CORP

Inventor： MADER H ,  HOCHREUTINER R

IPC: H04J3/07 ,  H03B3/04

CPC classification number: H04J3/073

Abstract: A hybrid digital phase locked loop is disclosed to recover an isochronous clock from a ''''stuffed'''' multiplexed input signal as found in an asynchronous PCM demultiplexer. A low frequency voltage controlled multivibrator is controlled by the output of a phase comparator. The phase comparator is coupled to the input signal and the output signal of a distributor. The distributor is controlled by the multivibrator to sequentially switch a multiphase output signal of a crystal oscillator to provide the output signal of the distributor. This arrangement overcomes the requirement of a voltage controlled crystal oscillator per channel group in the demultiplexer.

Abstract translation: 公开了一种混合数字锁相环，用于从异步PCM解复用器中发现的“填充”复用输入信号恢复同步时钟。 低频电压控制的多谐振荡器由相位比较器的输出控制。 相位比较器耦合到输入信号和分配器的输出信号。 分配器由多谐振荡器控制以依次切换晶体振荡器的多相输出信号以提供分配器的输出信号。 这种布置克服了在解复用器中每个通道组的压控晶体振荡器的要求。