Class-D amplifier
US7167046B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Nov 24, 2004 |
| Grant date | Jan 23, 2007 |
| Priority date | — |
| Expiry date | Nov 24, 2024 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03F2200/78
- WIPO fieldBasic communication processes
- WIPO sectorElectrical engineering
Abstract
A class-D amplifier includes: an operational amplifier and capacitors, which constitute an integrator for integrating a difference between a plus-sided input signal and a minus-sided input signal which constitute analog input signals; delay circuits for delaying a phase of a triangular wave by a desirable very small angle; resistors, which constitute a synthesizing circuit for synthesizing an output of the integrator, the triangular wave, and outputs of the delay circuits with each other; comparators for comparing outputs of the synthesizing circuit with each other; AND circuits which constitute a buffer for inputting outputs of the comparators; and resistors feeding back an output of the buffer to an input side of the integrator.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.