Zero-crossing management in Class-D audio amplifiers
US11722107B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jan 31, 2022 |
| Grant date | Aug 8, 2023 |
| Priority date | — |
| Expiry date | Jan 31, 2042 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03F2200/03
- WIPO fieldBasic communication processes
- WIPO sectorElectrical engineering
Abstract
Class-D amplifier circuits provide operation with low-distortion zero crossings outside of a unipolar power supply voltage range. The amplifiers include a first H-bridge driver circuit and a second H-bridge driver circuit. The class-D amplifier circuits also include a control circuit having an input for receiving an input signal to be reproduced by the class-D amplifier circuit. The control circuit has outputs coupled to inputs of the first and second H-bridge drivers, and includes one or more modulators. The control circuit selects between actively operating a selected one of the driver circuits or both, according to the signal to be reproduced, while setting an unselected driver circuit to turn either a high-side switch or a low-side switch of the unselected one of the first driver circuit or the second driver circuit fully on for at least some cycles of the one or more modulators.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.