Logarithmic gain control circuit and method
US6249170A · kind A · utility
8Cited by
6References
14Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Apr 14, 2000 |
| Grant date | Jun 19, 2001 |
| Priority date | — |
| Expiry date | Apr 14, 2020 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03G7/06
- WIPO fieldBasic communication processes
- WIPO sectorElectrical engineering
Abstract
An improved logarithmic amplifier (100) and method in which a signal at an output (106) is logarithmic with respect to the voltage supplied at a gain control input (102). The logarithmic amplifier (100) includes a first amplifier stage (110) and a second amplifier stage (130) which are coupled together by a current mirror stage (120). Alternative embodiments of logarithmic amplifier (200) and (300) include different biasing methods for biasing the second amplifier stage (130).
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.