Distortion reducing variable output impedance class-D amplifier
US11290069B2 · kind B2 · utility
2Cited by
7References
16Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Aug 25, 2020 |
| Grant date | Mar 29, 2022 |
| Priority date | — |
| Expiry date | Sep 14, 2040 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03F2203/45528
- WIPO fieldBasic communication processes
- WIPO sectorElectrical engineering
Abstract
A Class-D amplifier that includes a driver stage operable in a plurality of modes having different respective output impedances, a loop filter having an output, and a circuit configured to sense a current at a load of the Class-D amplifier, determine, based on the sensed current, an IR drop for a respective output impedance of the driver stage, and add the IR drop to the loop filter output to compensate for the respective output impedance of the driver stage to reduce distortion.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.