Lowe Hauptman & Ham, LLP
PLL with oscillator PVT compensation
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.
Taiwan Semiconductor Manufacturing Company, Ltd.
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Chih-Hsien Min-Shueh Matt
Chang Yuan Li