Oversampled digital-to-analog converter for multilevel data transmission
US5198818A · kind A · utility
51Cited by
8References
16Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Nov 7, 1991 |
| Grant date | Mar 30, 1993 |
| Priority date | — |
| Expiry date | Nov 7, 2011 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03M7/06
- WIPO fieldBasic communication processes
- WIPO sectorElectrical engineering
Abstract
A digital-to-analog converter (DAC) is disclosed which uses an oversampled modulation technique followed by an analog lowpass filter to generate an output waveform with four precisely controlled amplitude levels for 2B1Q data transmission applications. The DAC accepts a 2-bit input word at the baud rate and generates one of four possible analog output amplitudes having relative ratios of +3, +1, -1, and -3.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.