Variable gain amplifier
US7463093B2 · kind B2 · utility
5Cited by
2References
13Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Mar 16, 2007 |
| Grant date | Dec 9, 2008 |
| Priority date | — |
| Expiry date | Jun 21, 2027 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03F2200/451
- WIPO fieldBasic communication processes
- WIPO sectorElectrical engineering
Abstract
A variable gain amplifier includes multiple gain stages. Each gain stage includes a gain transistor and a cascode transistor to form a cascode amplifier, and a current diversion transistor to divert current away from a cascode transistor to reduce gain in the stage. A control circuit is included to maintain substantially constant drain-to-source voltage and drain current in the gain transistor.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.