Integrated circuit frequency generator
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United States of America Patent
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Nov 29, 2016
Grant Date -
Oct 8, 2015
app pub date -
May 29, 2015
filing date -
Feb 13, 2009
priority date (Note) -
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Abstract
An integrated circuit frequency generator is disclosed. In some embodiments, the frequency generator comprises an electronic oscillator configured to generate an oscillator frequency and calibration circuitry configured to periodically calibrate the electronic oscillator with respect to a reference frequency source. When a primary power source is unavailable, an output frequency is generated from the oscillator frequency, and the reference frequency source is powered-on only during calibration cycles.
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