Jitter self-test using timestamps
US11228403B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Dec 9, 2019 |
| Grant date | Jan 18, 2022 |
| Priority date | — |
| Expiry date | Jan 31, 2040 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04L1/24
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A method for estimating jitter of a clock signal includes generating a phase-adjusted clock signal based on an input clock signal and a feedback clock signal using a frequency-divided clock signal. The method generating N digital time codes for each phase adjustment of P phase adjustments of the phase-adjusted clock signal using a reference clock signal. Each digital time code of the N digital time codes corresponds to a first edge of a clock signal based on the frequency-divided clock signal. P is a first integer greater than zero and N is a second integer greater than zero. The method includes generating a jitter indicator based on an expected period of the clock signal and the N digital time codes for each phase adjustment of the P phase adjustments.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.