发明授权
US06621356B2 Phase-locked loop with short transient recovery duration and small interference signal component 失效
具有短暂恢复持续时间和小干扰信号分量的锁相环

  • 专利标题: Phase-locked loop with short transient recovery duration and small interference signal component
  • 专利标题(中): 具有短暂恢复持续时间和小干扰信号分量的锁相环
  • 申请号: US10113632
    申请日: 2002-03-27
  • 公开(公告)号: US06621356B2
    公开(公告)日: 2003-09-16
  • 发明人: Edmund GötzBernd MemmlerGünter Schönleber
  • 申请人: Edmund GötzBernd MemmlerGünter Schönleber
  • 优先权: DE19946200 19990927
  • 主分类号: H03L700
  • IPC分类号: H03L700
Phase-locked loop with short transient recovery duration and small interference signal component
摘要:
In order to shorten the transient recovery duration, the phase-locked loop has a voltage-controlled oscillator providing an oscillator signal to a first frequency divider. The first frequency divider divides the frequency of the oscillator signal, generates a first divider output signal therefrom, and passes it to a phase comparator during the transient recovery duration of the phase-locked loop. Furthermore, a unit is provided, which, after the transient recovery duration of the phase-looped loop, divides the frequency of the first divider output signal and passes it to the phase comparator. The phase comparator compares the first divider output signal with a first reference signal during the transient recovery duration. The phase comparator compares the divided divider output signal with a second reference signal after the transient recovery duration. The output of the phase comparator is connected to the voltage-controlled oscillator via a controllable charge pump.
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