Frequency responsive bus coding
US8451913B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Dec 17, 2010 |
| Grant date | May 28, 2013 |
| Priority date | — |
| Expiry date | Dec 21, 2030 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04L25/4915
- WIPO fieldDigital communication
- WIPO sectorElectrical engineering
Abstract
A data system permits bus encoding based on frequency of the bus and the frequency of switching on the bus so as to avoid undesirable frequency conditions such as a resonant condition or interference with other electrical devices. Transmission frequencies along one or more busses are monitored and used to control the encoding process, for example, an encoding process based on data bus inversion (DBI). The use of both a measure of an absolute number of logic levels (“DBI_DC”) and a measure of a number of logic level transitions relative to a prior signal (“DBI_AC”) provides a measure of control that may be used to compensate for both main and predriver switching noise.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.