Electronic hearing aid control circuit
US4543453A · kind A · utility
15Cited by
5References
12Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Mar 30, 1983 |
| Grant date | Sep 24, 1985 |
| Priority date | — |
| Expiry date | Mar 30, 2003 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04R25/00
- WIPO fieldBasic communication processes
- WIPO sectorElectrical engineering
Abstract
An electronic power control circuit for a hearing aid amplifier. The circuit includes a feedback stage, output stage, and output transducer. The feedback and output stages cooperatively define a current regulator that controls the current of the output stage. A variable resistor is provided for adjusting the maximum signal level that can be applied to the output transducer in the hearing aid. Such adjustment prohibits the output transducer from producing an undesirably loud acoustic output. Adjustment of the variable resistor also simultaneously varies both the quiescent current of the output stage and the hearing aid gain.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.