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Phase locked circuit

  • US 20080180143A1
  • Filed: 08/08/2006
  • Published: 07/31/2008
  • Est. Priority Date: 08/09/2005
  • Status: Active Grant
First Claim
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1. A phase locked circuit, comprising;

  • a locked loop circuitincludes including a phase comparator and a voltage controlled oscillator,wherein the locked loop circuit and outputs an output signal of the voltage controlled oscillator,the phase comparator outputs a phase difference signal which corresponds to a phase difference between a reference signal input from an outside and a feedback signal based on the output signal of the voltage controlled oscillator,a frequency of the output signal of the voltage controlled oscillator is controlled on the basis of the phase difference signal, andat least one band pass filter is provided to an output side of the locked loop circuit.

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