Log-linear variable gain amplifiers and amplifier control apparatus and methods
US6163198A · kind A · utility
6Cited by
7References
18Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Jul 26, 1999 |
| Grant date | Dec 19, 2000 |
| Priority date | — |
| Expiry date | Jul 26, 2019 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03G7/06
- WIPO fieldBasic communication processes
- WIPO sectorElectrical engineering
Abstract
Log-linear variable gain amplifiers and amplifier control apparatus and methods providing temperature compensated log-linear gain characteristics with a wide range of control for a current steered variable gain amplifier. The invention provides the sum of scaled linear and exponential terms, proportional to absolute temperature and responsive to an input control voltage. The sum of these terms is applied to a current steered variable gain amplifier to provide the desired log-linear variable gain control. Various embodiments are disclosed.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.