Audio reproducing device and method, audio amplifier, and integrated circuit for audio amplifier
US7102426B2 · kind B2 · utility
8Cited by
5References
11Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Dec 22, 2003 |
| Grant date | Sep 5, 2006 |
| Priority date | — |
| Expiry date | Mar 20, 2024 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03M3/502
- WIPO fieldBasic communication processes
- WIPO sectorElectrical engineering
Abstract
A digital ΔΣ modulated signal produced by a quantizer (1c) in a ΔΣ modulation processing unit (1) is put in to a feedback loop before inputted to a power switch (2) and converted into an analog signal by a D/A converter (1d). This analog signal is fed back to the input stage (a differentiator (1a)) of the ΔΣ processing unit (1) to prevent the switching distortion of the power switch (2) itself from being introduced into the feedback loop thereby to suppress the influence of the switching distortion.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.