Programmable wide-range frequency synthesizer
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United States of America Patent
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Sep 5, 2000
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N/A
app pub date -
Mar 23, 1999
filing date -
Nov 5, 1998
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Abstract
Method and circuitry for a frequency synthesizer having wide operating frequency range. The frequency synthesizer uses multiple programmable loadable counters in a phase-locked loop arrangement to generate any combination of clock frequencies based on user programmed values. In a specific embodiment of the invention, the phase-locked loop includes a voltage-controlled oscillator with a built-in programmable phase shift. The present invention further provides a preferred embodiment for a high speed loadable down counter for use in the frequency synthesizer.
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