Low-noise gain switching circuit using tapped inductor
US6472936B1 · kind B1 · utility
Assignee
Inventor
Key dates
| Filing date | May 14, 2001 |
| Grant date | Oct 29, 2002 |
| Priority date | — |
| Expiry date | May 14, 2021 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03F2203/7231
- WIPO fieldBasic communication processes
- WIPO sectorElectrical engineering
Abstract
There is disclosed an improved variable gain low-noise amplifier. The variable gain low-noise amplifier comprises: 1) an input transistor having a first ground terminal coupled to ground and an input terminal coupled to an input signal; 2) N output transistor, each of the N output transistors having a first output terminal coupled to a second output terminal of the input transistor; 3) N switches, each of the N switches turning a corresponding one of the N output transistors ON and OFF by selectively coupling an input terminal of the corresponding one of the N output transistors to one of: 1) an enabling voltage and 2) a disabling voltage; and 4) an inductor comprising a first inductor terminal coupled to a supply voltage, a second inductor terminal coupled to a second output terminal of a first one of the N output transistors, and N−1 tap points intermediate the first and second inductor terminals, each of the N−1 tap points coupled to a second output terminal of a corresponding one of the remaining N−1 output transistors.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.