Low power quadrature voltage controlled oscillator using back gate
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United States of America Patent
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Dec 5, 2006
Grant Date -
Mar 3, 2005
app pub date -
Aug 25, 2004
filing date -
Aug 25, 2003
priority date (Note) -
Expired
status (Latency Note)
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Abstract
Disclosed is a quadrature VCO (voltage controlled oscillator) which comprises a first delay cell including a first switching transistor and a second switching transistor, the first delay cell outputting first and second in-phase signals with different phases; and a second delay cell including a third switching transistor and a fourth switching transistor, the second delay cell outputting first and second quadrature-phase signals with different phases. The first and second quadrature-phase signals are applied to back gates of the first and second switching transistors, and the first and second in-phase signals are applied to back gates of the fourth and third switching transistors.
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