Method and circuit for simple measurement of the phase shift between two digital clock signals having the same frequency
US12066487B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Oct 19, 2020 |
| Grant date | Aug 20, 2024 |
| Priority date | — |
| Expiry date | Apr 20, 2041 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03K3/037
- WIPO fieldBasic communication processes
- WIPO sectorElectrical engineering
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.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.