Systems and methods with reduced reference spurs using a crystal oscillator for broadband communications
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United States of America Patent
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May 10, 2011
Grant Date -
May 13, 2010
app pub date -
May 8, 2009
filing date -
Dec 19, 2006
priority date (Note) -
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Abstract
Systems and methods are provided. In this regard, a representative system incorporates a crystal oscillator circuit and a digital automatic level control circuit. The digital automatic level control circuit is operative to: convert an oscillation amplitude of the crystal oscillator circuit to a proportional DC voltage; convert the DC voltage to a corresponding digital code representation; and adjust bias current and oscillator loop gain such that a desired oscillation amplitude is set.
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