Low distortion class-D amplifier
US7471144B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Dec 20, 2006 |
| Grant date | Dec 30, 2008 |
| Priority date | — |
| Expiry date | Apr 25, 2027 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03F1/3205
- WIPO fieldBasic communication processes
- WIPO sectorElectrical engineering
Abstract
A low distortion class-D amplifier. The amplifier comprises a power supply terminal for receiving power, an amplification stage, and an output stage. The amplification stage receives an input signal and generates a ramp signal. Further more, the amplification stage generates a pulse width modulation signal based on the ramp signal and a hysteretic signal. The output stage coupled to the power supply terminal receives the pulse width modulation signal and generates an output. Advantageously, the ramp signal and the hysteretic signal are positioned at a voltage level that is half the voltage level of said power supply and that varies proportionally with said power supply.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.