Digital/analogue converter
US4571572A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Mar 25, 1985 |
| Grant date | Feb 18, 1986 |
| Priority date | — |
| Expiry date | Mar 25, 2005 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03M1/82
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A digital-to-analogue converter for use in a digitally-recorded-signal reproducing apparatus comprises a first constant current source, a switch for allowing the constant current of the first constant current source to flow therethrough for a period corresponding to the digital data, a second constant current source generating a current flowing in the direction opposite to that of the current generated by the first constant current source, a switch for allowing the current of the second constant current source to flow therethrough for a predetermined constant period, and an integrator, wherein the sum of the first and second constant currents is integrated by the integrator. The analogue signal outputted by the integrator has a center level in the vicinity of the ground potential level.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.