Synthesizer with lock detector, lock algorithm, extended range VCO, and a simplified dual modulus divider
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United States of America Patent
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app pub date -
May 4, 2004
filing date -
Dec 22, 2000
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Abandoned
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Abstract
The present invention provides a synthesizer having an efficient lock detect signal generator, an extended range VCO that can operate within any one of a plurality of adjacent characteristic curves defined by a plurality of adjacent regions, and a divide circuit implemented using only a single counter along with a decoder. This allows for a method of operating the synthesizer, methods of establishing or reestablishing a lock condition using the extended range VCO, and a method of designing a plurality of divide circuits which each use the same single counter and each use a different decoder.
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