Multiple-tail transconductance switchable gain amplifer
US5977828A · kind A · utility
16Cited by
6References
14Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Dec 12, 1997 |
| Grant date | Nov 2, 1999 |
| Priority date | — |
| Expiry date | Dec 12, 2017 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03F2203/45702
- WIPO fieldBasic communication processes
- WIPO sectorElectrical engineering
Abstract
This invention relates to variable gain amplifiers. The general technique described consists of adding gain elements in parallel in order to create multiple-gain amplifier stages versus the usual dual-gain amplifier stages separated from one another by DC level shift modules. The gain elements are enabled or disabled individually in combinations, which provide a range of controlled gain steps. The main advantages are that current consumption and design complexity are greatly reduced, thereby increasing operating battery life of the device using this type of amplifier.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.