Numerically controlled oscillator and method of operation
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United States of America Patent
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Oct 14, 2008
Grant Date -
Dec 15, 2005
app pub date -
Jun 14, 2004
filing date -
Jun 14, 2004
priority date (Note) -
Expired
status (Latency Note)
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Abstract
In one embodiment, the present invention is directed to a numerically controlled oscillator. The numerically controlled oscillator comprises: a phase accumulator for receiving an input digital word; and a phase to amplitude converter that is operatively coupled to the phase accumulator to receive a first phase signal and a second phase signal, the phase to amplitude converter calculating a sine value and a cosine value of each of the first and second phase signals, the phase to amplitude converter generating a summation of (i) a product of the sine value of the first phase signal and the cosine value of the second phase signal and (ii) a product of the sine value of the second phase signal and the cosine value of the first phase signal.
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