METHOD AND APPARATUS FOR BIASING A MIXER
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United States of America Patent
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Issued Date -
Apr 29, 2010
app pub date -
Oct 31, 2008
filing date -
Oct 28, 2008
priority date (Note) -
Abandoned
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Abstract
A method and apparatus for mixing an input signal in a communications system. The apparatus includes an in-phase mixer, a quadrature mixer, and bias circuits. The in-phase mixer mixes the input signal with an in-phase local oscillator signal. The quadrature mixer mixes the input signal with a quadrature local oscillator signal. The quadrature local oscillator signal is approximately 90° out of phase with the in-phase local oscillator signal. The bias circuits provide DC bias to the in-phase mixer and to the quadrature mixer to balance their outputs.
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