Framed delta sigma data with unlikely delta sigma data patterns
US6408034B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Mar 4, 1998 |
| Grant date | Jun 18, 2002 |
| Priority date | — |
| Expiry date | Mar 4, 2018 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04L7/033
- WIPO fieldTelecommunications
- WIPO sectorElectrical engineering
Abstract
A communication system having a framing pattern to frame data to be transmitted to a phone line is provided. The data may be framed on one side of an isolation barrier and a clock signal may be extracted from the framed data stream on the other side of the barrier. The data to be framed is provided from an output of a delta-sigma modulator and the framing pattern utilized is a pattern that is unlikely to match the data stream output of the modulator. Thus, an erroneous detection of the framing pattern is unlikely to occur. The framing pattern is chosen to correspond to the expected modulator output for a full scale input signal that is at a frequency higher than the maximum actual frequency of the input data provided to the modulator.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.