High resolution digital controlled oscillator
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United States of America Patent
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Mar 30, 2004
Grant Date -
Nov 14, 2002
app pub date -
May 9, 2002
filing date -
May 11, 2001
priority date (Note) -
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Abstract
The present invention provides a frequency synthesis circuit. The frequency synthesis circuit includes a noise-shaping quantizer and a digitally controlled oscillator. The noise-shaping quantizer responsive to a plurality of input bits for shaping error signals resulting from the quantization conversion such that most of the error occurs at high frequency. The digitally controlled oscillator is connected to the output of the quantizer having an output frequency responsive to the output of the quantizer.
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