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GPS receiver having RF front end power management and simultaneous baseband searching of frequency and code chip offset

  • US 20060068853A1
  • Filed: 09/28/2004
  • Published: 03/30/2006
  • Est. Priority Date: 09/28/2004
  • Status: Active Grant
First Claim
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1. A receiver with power management, comprising:

  • an RF front end and a baseband processor;

    the RF front end having a bandwidth, and comprising;

    a first filter network adapted to receive an RF signal, the first filter network having an output terminal;

    a first mixer having a first input terminal coupled to the output terminal of the first filter network;

    a first signal source having an output terminal coupled to a second input terminal of the first mixer;

    a second filter network, coupled to receive an output signal from the first mixer, the second filter network having an output terminal;

    a second mixer having a first input terminal coupled to the output terminal of the second filter network;

    a second signal source having an output terminal coupled to a second input terminal of the first mixer;

    a third filter network, coupled to receive an output signal from the second mixer, the third filter network having an output terminal; and

    an analog-to-digital converter coupled to the output of the third filter network; and

    further comprising control circuitry coupled to the first signal source, and the analog-to-digital converter;

    wherein the control circuitry is operable to provide a first set of control signals such that, the first signal source has a first output frequency, and the analog-to-digital converter has a first sample rate;

    a second set of control signals such that the first signal source has a second output frequency, and the analog-to-digital converter has a first sample rate; and

    a third set of control signals such that, the first signal source has the first output frequency, and the analog-to-digital converter has a second sample rate.

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