High bandwidth programmable transmission line pre-emphasis method and circuit
US8295336B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Mar 16, 2010 |
| Grant date | Oct 23, 2012 |
| Priority date | — |
| Expiry date | Feb 17, 2031 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04B3/141
- WIPO fieldTelecommunications
- WIPO sectorElectrical engineering
Abstract
A transmission line pre-emphasis circuit includes a primary signal path receiving a digital data stream and generating a primary output current indicative of the digital data stream, one or more secondary signal paths each incorporating a network implementing a specific transient response where the one or more secondary signal paths receive the digital data stream and generate secondary output currents representing one or more overshoot signals indicative of the transient response of the respective network. The one or more secondary signal paths have variable gain being programmed through respective DC programming signals. The secondary output currents are summed with the primary output current. The transmission line pre-emphasis circuit further includes an output loading stage coupled to generate from the summed current a pre-emphasized digital output signal indicative of the one or more overshoot signals added to the digital data stream.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.