Control of base currents for output driver transistors in amplifiers
US11764740B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Aug 31, 2021 |
| Grant date | Sep 19, 2023 |
| Priority date | — |
| Expiry date | Aug 31, 2041 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03F2203/30061
- WIPO fieldBasic communication processes
- WIPO sectorElectrical engineering
Abstract
Examples of amplifiers accurately generate control currents for control terminals of output drivers using current-replication transistors and current mirrors. An input terminal of a first current mirror is coupled to the control terminal of a first current-replication transistor, and an input terminal of a second current mirror is coupled to the control terminal of a second current-replication transistor. The output terminals of the first and second current mirrors are coupled to the control terminals of first and second output drivers, respectively. First and second intermediate currents indicative of first and second currents flowing to the first and second output driver elements, respectively, are generated. Using the first and second current mirrors, first and second control currents are generated to control the first and second output driver elements, respectively, by scaling the first and second intermediate currents according to the gain factors of the current mirrors.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.