Digitally controlled oscillator and associated method
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United States of America Patent
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Feb 12, 2008
Grant Date -
N/A
app pub date -
Jul 7, 2005
filing date -
Jan 24, 2005
priority date (Note) -
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Abstract
A digitally controlled oscillator circuit is provided that comprises a ring oscillator including multiple inverters; multiple digitally controlled capacitors (DCCs), each coupled to apply a digitally controllable amount of capacitance to an output of a different one of the inverters; and control circuitry operable to change an amount of capacitance applied to each inverter during operation of the ring oscillator and to cause the multiple DCCs to apply substantially the same amounts of capacitance to each of the inverter throughout operation of the ring oscillator.
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