Analog to digital converter
US4110745A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Oct 28, 1975 |
| Grant date | Aug 29, 1978 |
| Priority date | — |
| Expiry date | Oct 28, 1995 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03M1/363
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
An analog to digital converter used for converting such an analog signal having dc parts of a constant level periodically as a television picture signal, comprising a plurality of comparators comparing the analog signal with several reference voltage levels, and at least one dc clamper clamping the reference voltage levels in relation to the constant dc level contained in the analog signal. Consequently, the influence affected by dc drifts occuring in the signals and circuit elements may be avoided, so that, high exactness of conversion can be obtained. Besides, in a cascade connection of such converters converting respectively differential analog signals delayed successively to successive bits, high bit rate conversion can be performed without use of high speed circuit elements.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.