Power efficient hearing aid
US5111506A · kind A · utility
21Cited by
20References
6Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Mar 2, 1989 |
| Grant date | May 5, 1992 |
| Priority date | — |
| Expiry date | Mar 2, 2009 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04R2460/03
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A power efficient hearing aid uses a programmable biasing technique to set the quiescent operating points of amplifiers used by the hearing aid to avoid excessive power usage by the hearing aid. The hearing aid also includes power supply circuitry which develops +1.25 volts and -1.25 volts relative to ground from a single +1.25 volt source. The hearing aid also conserves power by selectively disabling low frequency signal processing channels in the presence of relatively large amplitude ambient noise.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.