Clock generator and universal serial bus module

Clock generator and universal serial bus module

  • CN 101,739,061 B
  • Filed: 12/04/2009
  • Issued: 06/03/2015
  • Est. Priority Date: 12/04/2009
  • Status: Active Grant
First Claim
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1. a clock generator, comprising:

  • Quartz (controlled) oscillator, has first end and the second end;

    Phase inverter, is parallel to above-mentioned quartz (controlled) oscillator, and the above-mentioned first end and above-mentioned second end that are used to above-mentioned quartz (controlled) oscillator produce the first signal and secondary signal respectively;

    Phase-locked loop circuit, is coupled to the above-mentioned first end of above-mentioned quartz (controlled) oscillator, in order to produce first clock signal with fixed frequency according to above-mentioned first signal;

    AndFrequency-spreading clock generator, is coupled to above-mentioned second end of above-mentioned quartz (controlled) oscillator, in order to produce the second clock signal with variable frequency according to above-mentioned secondary signal,Wherein, above-mentioned second clock signal is frequency-spreading clock signal, and above-mentioned frequency-spreading clock generator provides above-mentioned second clock signal to the second USB controller, meet the differential-pair signal of hypervelocity specification via connector reception and transmission for above-mentioned second USB controller, above-mentioned phase-locked loop circuit provides above-mentioned first clock signal to the first USB controller, meets the differential-pair signal of USB2.0 specification for above-mentioned first USB controller via above-mentioned connector reception and transmission.

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