Integrated analog-to-digital converter
US4860012A · kind A · utility
18Cited by
4References
33Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jun 22, 1987 |
| Grant date | Aug 22, 1989 |
| Priority date | — |
| Expiry date | Jun 22, 2007 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03M3/49
- WIPO fieldBasic communication processes
- WIPO sectorElectrical engineering
Abstract
A feedback coder, which employs simple CMOS push/pull amplifiers as gain elements, along with a bistable circuit, in its preferred embodiment takes the form of a second-order delta-sigma modulator. The output of the modulator is converted into pulse code modulated words by a finite impulse response filter which incorporates a partial coefficient generator utilizing simplified logic. The generator output is provided to an accumulator in which the stages operate at reduced speed. A simple multiplexer generates a serial output. The entire converter can be integrated on a semiconductor chip of relatively small area.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.