Hearing aid device with an output amplifier having a sigma-delta modulator
US7205918B2 · kind B2 · utility
5Cited by
10References
15Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Feb 15, 2006 |
| Grant date | Apr 17, 2007 |
| Priority date | — |
| Expiry date | Feb 15, 2026 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04R2460/03
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
In a digital hearing aid device with an output amplifier having a sigma-delta modulator, the output transducer has a high current consumption even when no output signal perceivable as an acoustic output signal is generated. A linear digital filtering in connection with the sigma-delta modulation reduces the number of the high-frequency edges in the (typically) pulse-density-modulated output signal.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.