Class-D amplifier with multiple power rails and quantizer that switches used ramp amplitude concurrently with switch in used power rail
US11245370B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Aug 25, 2020 |
| Grant date | Feb 8, 2022 |
| Priority date | — |
| Expiry date | Aug 25, 2040 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03F2203/45528
- WIPO fieldBasic communication processes
- WIPO sectorElectrical engineering
Abstract
A Class-D amplifier includes a plurality of power rails, a quantizer, and a driver stage. The quantizer and the driver stage have a combined gain. For each power rail of the plurality of power rails, the Class-D amplifier senses a voltage value for the power rail and determines a ramp amplitude based on the sensed voltage value. The Class-D amplifier concurrently switches from the driver stage using a first power rail to a second power rail of the plurality of power rails and switches from the quantizer using the ramp amplitude associated with the first power rail to using the ramp amplitude associated with the second power rail so that the combined gain is constant.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.