Multi-stage amplifier with improved operating efficiency
US9887674B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Aug 9, 2016 |
| Grant date | Feb 6, 2018 |
| Priority date | — |
| Expiry date | Aug 9, 2036 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03F2200/474
- WIPO fieldBasic communication processes
- WIPO sectorElectrical engineering
Abstract
A multi-stage amplifier, comprising a first amplifier stage is presented. The output of the first amplifier stage is coupled to a first terminal of a capacitor having a controllable capacitance. The input of a second amplifier stage is coupled to the output of the first amplifier stage and the first terminal of the capacitor. The output of the second amplifier stage is coupled to a second terminal of the capacitor and an output of the multi-stage amplifier. The input of a current sensing circuit is coupled with the output of the multi-stage amplifier. A control signal generator is coupled between the output of the current sensing circuit and a control terminal of the capacitor. The control signal generator provides a control signal to the capacitor in order to control or vary the capacitance of the capacitor.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.