Precoded waveshaping transmitter for a twisted pair which eliminates the need for a filter
US5995555A · kind A · utility
10Cited by
7References
7Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Oct 9, 1997 |
| Grant date | Nov 30, 1999 |
| Priority date | — |
| Expiry date | Oct 9, 2017 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04L25/03853
- WIPO fieldDigital communication
- WIPO sectorElectrical engineering
Abstract
A precoded waveshaping transmitter comprises a synchronous delay line circuit, a transmitter state machine and a differential current digital to analog converter. Through the provision of a plurality of precoded staggered time delayed data from the combination of the delay line circuit and transmitter state machine the DAC can provide a predetermined output. In a preferred implementation, a subharmonic frequency can be maintained at least 27dB below the fundamental frequency when the PWT is driven by an all ones Manchester encoded signal.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.