Multi-channel class-D audio amplifier with planar inductors
US8908887B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Aug 19, 2011 |
| Grant date | Dec 9, 2014 |
| Priority date | — |
| Expiry date | Oct 27, 2032 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03F3/68
- WIPO fieldBasic communication processes
- WIPO sectorElectrical engineering
Abstract
An apparatus for providing an audio signal to drive a speaker system includes first and second audio channels. The first audio channel has a first class-D amplifier for receiving an input signal, and a first reconstruction filter for receiving an output from the first class-D amplifier and reconstructing therefrom an output audio signal for driving the speaker system. The second audio channel has a second class-D amplifier for receiving an input audio signal, and a second reconstruction filter for receiving an output from the second class-D amplifier and reconstructing therefrom an output audio signal for driving the speaker system. The first and second reconstruction filters have corresponding first and second planar inductors, with the second planer inductor being magnetically coupled to the first planar inductor.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.