Digital pulse width modulated feedback system for a switching amplifier and method therefor
US7629840B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Oct 22, 2007 |
| Grant date | Dec 8, 2009 |
| Priority date | — |
| Expiry date | Jan 21, 2028 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03F3/217
- WIPO fieldBasic communication processes
- WIPO sectorElectrical engineering
Abstract
A switching amplifier includes a power stage, a low pass filter, a combining circuit, and a feedback correction circuit. The power stage has an input terminal and an output terminal. The low pass filter has an input terminal coupled to the output terminal of the power stage, and an output terminal for providing a filtered pulse width modulated signal. The combining circuit has a first input terminal coupled to the output terminal of the power stage, a second input terminal coupled to the output terminal of the low pass filter, and an output terminal. The feedback correction circuit has a first input terminal for receiving a reference pulse width modulated signal, a second input terminal coupled to the output terminal of the combining circuit, and an output terminal coupled to the input terminal of the power stage.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.