Method and circuit for simple measurement of the phase shift between two digital clock signals having the same frequency
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United States of America Patent
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Aug 20, 2024
Grant Date -
Dec 1, 2022
app pub date -
Oct 19, 2020
filing date -
Oct 19, 2020
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Abstract
A method for simple measurement of phase shift between a first clock signal and a second clock signal is described, each clock signal having a period T0. The method includes: feeding the first clock signal into a first input of a mixer; feeding the second clock signal into a second input of the mixer; feeding the output signal of the mixer into a low pass filter; and measuring the output signal of the low pass filter, with the aid of an output voltage that is normalized to operating voltage of the mixer. A circuit for implementing the method includes a mixer and a low pass filter. The mixer includes a first input for feeding in the first clock signal, and a second input for feeding in the second clock signal. The output of the mixer is connected to the input of the low pass filter.
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