Method and system for output common mode control for reducing DC offset for an IF mixer that downconverts a received signal to DC without introducing additional offset
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United States of America Patent
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May 7, 2013
Grant Date -
May 4, 2006
app pub date -
Oct 29, 2004
filing date -
Oct 29, 2004
priority date (Note) -
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Abstract
A method and system for output common mode control for reducing DC offset for an IF mixer that downconverts a received signal to DC without introducing additional offset is provided. Aspects of the method may comprise averaging signals having an output common mode DC level, which are generated from an output of the mixer. This determined average may then be compared to a reference voltage. The reference voltage may be an output common mode DC level required for baseband processing. The output common mode DC level may be corrected at an input of the mixer for signals that may subsequently be generated from an output of the mixer by utilizing results from the comparison. The corrected common mode DC offset level may be fed back to an input of the mixer.
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