Digital-to-analog converting circuit
US4818996A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Sep 16, 1987 |
| Grant date | Apr 4, 1989 |
| Priority date | — |
| Expiry date | Sep 16, 2007 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03M1/70
- WIPO fieldBasic communication processes
- WIPO sectorElectrical engineering
Abstract
A digital-to-analog converting circuit increases an absolute value of inputted digital data by a bit shift operation when minute digital data are inputted thereto. The shifted digital data are converted into an analog signal, and thereafter, such analog signal is attenuated in accordance with a shift value of the bit shift operation. The bit shift operation and the attenuation operation are performed when the value of the inputted digital data are smaller than a predetermined value for a predetermined time or more. Thus, a conversion accuracy of the minute digital data is raised, and a distortion generation depending on a frequently switching of the bit shift is avoided.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.