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Apparatus and method for frequency calibration between two radios

  • US 7,746,922 B2
  • Filed: 12/07/2005
  • Issued: 06/29/2010
  • Est. Priority Date: 12/07/2005
  • Status: Active Grant
First Claim
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1. A wireless device, comprising:

  • a crystal oscillator configured to generate a reference frequency;

    a radio circuit configured to operate according to the reference frequency; and

    a frequency offset circuit configured to generate, based on signal quality information in a wireless data signal received from a second wireless device, an offset value to reduce an operating frequency offset between the wireless device and the second wireless device, wherein the frequency offset circuit comprises an accumulator circuit, and wherein an overflow rate of the accumulator circuit represents the operating frequency offset of the radio circuit.

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