Class-D amplifier for reducing audio distortion
US12301182B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Sep 27, 2022 |
| Grant date | May 13, 2025 |
| Priority date | — |
| Expiry date | Nov 14, 2043 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03F2200/351
- WIPO fieldBasic communication processes
- WIPO sectorElectrical engineering
Abstract
A class-D amplifier having an output driver with a first, second, and third driver, the output driver having a first output coupled to the first and third drivers, a second output coupled to the second driver; a sensing resistor coupled in series between the first driver and the first output; and a pulse width modulation (PWM) controller coupled to the inputs of the drivers and configured to receive an audio input signal; control a PWM generator to generate a first pulse signal and a second pulse signal based on the audio input signal and a power supply input; determine a voltage drop across the sensing resistor; and, responsive to the voltage drop being greater than a threshold, sequence control of the first pulse signal to the first driver and switch a voltage at the first driver to an increased voltage based on the voltage drop.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.