Current divider based voltage controlled gain amplifier
US9099975B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Jun 27, 2013 |
| Grant date | Aug 4, 2015 |
| Priority date | — |
| Expiry date | Aug 15, 2033 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03G1/007
- WIPO fieldBasic communication processes
- WIPO sectorElectrical engineering
Abstract
An RF amplifier includes an input stage, a buffer stage, and an output stage. The input stage is configured to provide attenuation and impedance matching for an input radio frequency (RF) signal by providing shunt and series variable resistance current paths and RF power to RF current conversion. The input stage routes the RF current between the current paths resulting in an attenuation of the RF input current. The buffer stage is configured to provide an intermediate RF current which tracks the current level of the attenuated RF input current, thereby providing isolation between the input and output stages. The output stage is configured to provide RF current to RF power conversion, utilizing the intermediate RF current to provide an RF signal having an RF output power proportional to the RF input power.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.