Integrated analog-to-digital converter
US4937577A · kind A · utility
23Cited by
5References
24Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jun 23, 1987 |
| Grant date | Jun 26, 1990 |
| Priority date | — |
| Expiry date | Jun 23, 2007 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06F2207/388
- 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 impluse response filter which incorporates a partial coefficient generator utilizing simplified logic. The generator output is provided to an accumulator in which the stage 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.