Frequency detection device and method thereof

Frequency detection device and method thereof

  • CN 101,826,871 A
  • Filed: 03/03/2009
  • Published: 09/08/2010
  • Est. Priority Date: 03/03/2009
  • Status: Active Grant
First Claim
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1. frequency detecting device comprises:

  • Freq converting circuit receives input clock, and produces analog signal corresponding to the frequency of this input clock according to the frequency of this input clock;

    AndAnalog conversion circuit is coupled in this freq converting circuit, receives this analog signal, and to produce the judgment signal corresponding to the frequency of this input clock, wherein this judgment signal is in order to represent the frequency separation of this input clock according to this analog signal.

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