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RF converter with multiple mode frequency synthesizer compatible with a 48 Fo GPS baseband processor

  • US 7,639,724 B2
  • Filed: 10/11/2002
  • Issued: 12/29/2009
  • Est. Priority Date: 10/11/2001
  • Status: Active Grant
First Claim
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1. An RF-to-IF converter comprising:

  • radio frequency (RF) to intermediate frequency (IF) processing circuitry; and

    a frequency synthesizer comprising;

    a local oscillator (LO) output coupled to the processing circuitry;

    a baseband processor clock output; and

    clock generation circuitry coupled to the LO output, for generating a baseband processor clock with a frequency of approximately 48 fo on the baseband processor clock output, where fo is 1.023 MHz, wherein the clock generation circuitry further comprises a divide-by-2 counter and a multiplexer, the divide-by-2 counter comprising an input coupled to the output of the divide-by-32 counter and an output coupled to the multiplexer.

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