公开(公告)号：US3903482A

公开(公告)日：1975-09-02

申请号：US47689774

申请日：1974-06-06

Applicant: ERICSSON TELEFON AB L M

Inventor： PAUSINI FERRUCCIO ,  SQUARTINI GIORGIO

IPC: H03L7/14 ,  H03B3/04

CPC classification number: H03L7/148

Abstract: In a phase locked loop synchronized oscillator wherein a phase detector compares an oscillator frequency and a synchronizing frequency to derive a voltage for controlling the oscillator frequency there is provided a memory circuit between the phase detector and the oscillator for holding the instantaneous value of the detector output and a blocking circuit for sensing for interferences in the control voltage to prevent the memory from changing the value hold before the interference occurred.

Abstract translation: 在锁相环同步振荡器中，相位检测器比较振荡器频率和同步频率以导出用于控制振荡器频率的电压，在相位检测器和振荡器之间提供存储电路，用于保持检测器输出的瞬时值 以及阻塞电路，用于感测控制电压中的干扰，以防止存储器在发生干扰之前改变保持值。