Method and system for a polyphase clock for a second intermediate frequency (IF) mixer to improve signal quality
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United States of America Patent
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Feb 5, 2008
Grant Date -
May 4, 2006
app pub date -
Oct 29, 2004
filing date -
Oct 29, 2004
priority date (Note) -
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Abstract
Methods and systems for reducing interference in a signal are disclosed herein. Aspects of the method may comprise generating a first local oscillator signal. The generated first local oscillator signal may be phase-shifted to generate a second local oscillator signal and the second local oscillator signal may be phase-shifted to generate a third local oscillator signal. The first, second, and third local oscillator signals may be combined to generate a combined local oscillator signal, where a third harmonic and/or a fifth harmonic may be eliminated from the combined local oscillator signal. The generated second local oscillator signal may be multiplied by a factor of square root of two ( {square root over (2)}). The first and third local oscillator signals may be added to the multiplied second local oscillator signal. An input signal may be mixed with the generated combined local oscillator signal to generate a mixed output signal.
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