Data sampler for digital frequency/phase determination
US7027545B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | May 9, 2001 |
| Grant date | Apr 11, 2006 |
| Priority date | — |
| Expiry date | Jul 4, 2023 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04L7/0334
- WIPO fieldDigital communication
- WIPO sectorElectrical engineering
Abstract
The present invention, generally speaking, provides a digital circuit and method for forming number streams for frequency and/or phase comparison of digital or digitized signals, referred to herein as clock signals, where typically one of the clock signals is a known clock signal and another of the clock signal is an unknown clock signal. The unknown clock signal may be derived from a communications signal, for example. The rate of the unknown clock signal may exceed the rate of the known clock signal. In an exemplary embodiment, an “alias” value (e.g., an integer 1, 2, 3, etc.) is applied to the circuit as an indication of the expected frequency range of the unknown clock signal. The number stream is formed accordingly.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.