PLL with oscillator PVT compensation
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United States of America Patent
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Feb 24, 2015
Grant Date -
Jul 3, 2014
app pub date -
Dec 31, 2012
filing date -
Dec 31, 2012
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Abstract
A voltage controlled oscillator (VCO) includes a current controlled oscillator, a voltage-to-current converter, and a sensing circuit. The sensing circuit includes a delay unit, and the sensing circuit is configured to generate a plurality of compensation control signals in response to a time delay of the delay unit. The voltage-to-current converter is configured to generate a current signal in response to a VCO control signal and the plurality of compensation control signals. The current controlled oscillator is configured to generate an oscillating signal in response to the current signal.
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