Digital/analogue conversion
US5952945A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Aug 14, 1997 |
| Grant date | Sep 14, 1999 |
| Priority date | — |
| Expiry date | Aug 14, 2017 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03M1/66
- WIPO fieldBasic communication processes
- WIPO sectorElectrical engineering
Abstract
Method and apparatus of converting between digital and analogue signal formats, wherein dither signals are combined with information signals to be converted, the dither signals being as a predetermined plurality of particular discrete frequencies that are outside desired information signal bandwidth and have orderly relation including to signal conversion sampling rate, which orderly relation aids looping of sequences of patterns in a related data stream having pattern-to-pattern transitions similar to within-pattern transitions. Specifically, discrete dither signal frequencies have integral relation with their minimum separation or spacing and with said sampling rate, the lowest frequency and the minimum frequency separation each being whole number divisors or submultiples of higher dither frequencies andor of the signal conversion rate.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.