Balanced distortion reduction circuit
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United States of America Patent
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May 11, 2004
Grant Date -
Jan 2, 2003
app pub date -
Jun 27, 2002
filing date -
Jun 29, 2001
priority date (Note) -
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Abstract
A method and apparatus for utilizing the distortion generated within a portion of a balanced amplifier to cancel the distortion generated within the whole balanced amplifier. Samples of the signal and distortion from part of the balanced amplifier are combined with a reference signal such that the two signals destructively combine leaving the distortion from the sampled part of the balanced amplifier. The gain and phase of the distortion is then adjusted so that when it is coupled into the input of the other part of the balanced amplifier the distortion generated by both parts of the balanced amplifier are cancelled.
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