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FREQUENCY MIXER WITH COMPENSATED DC OFFSET CORRECTION TO REDUCE LINEARITY DEGRADATION

  • US 20140079157A1
  • Filed: 09/18/2012
  • Published: 03/20/2014
  • Est. Priority Date: 09/18/2012
  • Status: Active Grant
First Claim
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1. An apparatus comprising:

  • a frequency mixer circuit configured to generate a baseband signal based on a local oscillator signal and a radio frequency signal; and

    a compensation circuit configured to generate a DC offset-compensated signal based on the baseband signal, a DC offset compensation signal, and a second signal, the DC offset compensation signal and the second signal having currents approximately equal in magnitude and opposite in direction, a current of the DC offset-compensated signal being substantially the same as a current of the baseband signal.

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