Method and apparatus for separating data and clock from a digital data stream
US5598443A · kind A · utility
Assignees
Inventor
Key dates
| Filing date | May 23, 1994 |
| Grant date | Jan 28, 1997 |
| Priority date | — |
| Expiry date | May 23, 2014 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04L7/0331
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A digital data separator is provided for separating clock information and data from a data stream which is subject to varying amounts of undesired jitter which tend to corrupt the data. A read data window of controlled duration is generated for sampling the input data. The current best estimate of the duration of the read data window is stored in a period register as a period register value. The period register value minus one is loaded into a time register as the time register value. A count down cycle is performed by subtracting a value of one from the time register value in each clock cycle during the course of the count down cycle. The read data window is toggled to begin a new read data window when the time register value is near zero, the value remaining in the time register being designated the remaining value.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.