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Wireless communications system including dual-purpose clock reference for global positioning system and baseband

  • US 9,214,923 B2
  • Filed: 05/06/2015
  • Issued: 12/15/2015
  • Est. Priority Date: 06/24/2009
  • Status: Active Grant
First Claim
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1. A wireless communications system comprising:

  • a clock module configured to generate a first clock reference that is not corrected using automatic frequency correction (AFC);

    a global positioning system (GPS) module configured to operate in response to the first clock reference;

    an integrated circuit for a cellular transceiver, wherein the integrated circuit comprises a system phase lock loop (PLL) configured to (i) operate in response to the first clock reference, and (ii) generate a corrected clock reference by performing AFC on the first clock reference in response to an AFC signal; and

    a baseband module configured to (i) operate in response to the first clock reference from the clock module, and (ii) generate the AFC signal.

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