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System and method for providing a low power receiver design

  • US 6,377,315 B1
  • Filed: 11/12/1999
  • Issued: 04/23/2002
  • Est. Priority Date: 11/12/1998
  • Status: Expired due to Fees
First Claim
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1. An integrated receiver comprising:

  • a substrate providing a physical medium upon which a receiver circuit is disposed;

    a first local oscillator;

    a second local oscillator;

    a mixer having its circuit elements disposed upon the substrate for converting a received signal to a first IF using the first local oscillator'"'"'s output to mix the received signal with;

    a first buffer amplifier having its circuit elements disposed upon the substrate cascaded after the mixer;

    an external first differential filter assembly coupled to the first buffer amplifier output for removing an image distortion from the first IF and removing unwanted channels;

    a second buffer amplifier having its circuit elements disposed upon the substrate coupled to the external first differential filter assembly output;

    a first I/Q mixer disposed upon the substrate for converting the first IF to a second IF I and Q signal and rejecting a first IF image distortion;

    a polyphase circuit for combining the second IF I and Q signals into a second IF signal;

    a third buffer amplifier having its circuit elements disposed upon the substrate and cascaded with the polyphase circuit; and

    an external second differential filter assembly coupled to the third buffer amplifier output for removing an image distortion from the second IF and removing unwanted channels;

    whereby frequency conversion, channel selectivity and image rejection are performed on the integrated circuit.

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