Gain adjustable sigma delta modulator system
US6278392A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Aug 10, 1999 |
| Grant date | Aug 21, 2001 |
| Priority date | — |
| Expiry date | Aug 10, 2019 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01R21/06
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A system having an adjustable gain includes: a modulator, for producing a stream of digital words representative of an input analog signal; and, a gain adjustor, fed by a gain signal representative of the adjustable gain, for converting the stream of digital words produced by modulator into an output stream of bits representative of the gain adjusted input analog signal. The stream of stream of digital words produced by modulator, which represent the gain adjusted input analog signal, can be produced with an register for storing the gain signal and an adder. Further, the stream of digital words bits produced by modulator can fed to an compact sinc filter for conversion into digital words which represent digital samples on the gain adjusted input analog signal. The system includes a sigma-delta modulator for producing a stream of digital words having values, M or N, such stream of digital words bits being representative of an input analog signal, X(t) fed to the modulator. A gain adjustor is fed by the sigma-delta modulator and a gain signal representative of the variable gain. The gain adjustor converts the stream of digital words produced by sigma delta modulator into an output st…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.