High linearity low noise variable gain amplifier with continuous gain control
US7317357B1 · kind B1 · utility
Assignee
Inventor
Key dates
| Filing date | Jun 23, 2006 |
| Grant date | Jan 8, 2008 |
| Priority date | — |
| Expiry date | Aug 19, 2026 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03F2203/45292
- WIPO fieldBasic communication processes
- WIPO sectorElectrical engineering
Abstract
A variable gain amplifier comprises a plurality of serially connected transistor cells, in which each of the transistor cells has a plurality of connecting terminals. The first terminals of the transistor cells are serially coupled together to receive a first input voltage. The second terminals of the transistor cells are serially connected via a first set of resistors between adjacent cells and coupled to a first gain control. Each of the second terminals is AC or virtual grounded. The third terminals of the transistor cells are coupled together to supply a positive current output. The fourth terminals of the transistor cells are coupled together to supply a negative current output.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.