Device and method for measuring a duty cycle of a clock signal
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United States of America
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Mar 18, 2025
Grant Date -
Dec 21, 2023
app pub date -
May 31, 2022
filing date -
May 31, 2022
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Abstract
A duty cycle measurement (DCM) device includes a charge pump circuit and a clocked comparator circuit. The charge pump circuit is configured to receive a clock signal that has an unknown duty cycle and to generate a capacitor voltage based on the duty cycle of the clock signal. The clocked comparator circuit is configured to receive the capacitor voltage and a reference voltage and to generate a digital output code based on the capacitor voltage and the reference voltage. The digital output code is indicative of the duty cycle of the clock signal. The charge pump circuit is further configured to receive the digital output code. A method of determining a duty cycle of a clock signal is also disclosed.
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