Microphone assembly with P-type preamplifier input stage
US8259963B2 · kind B2 · utility
83Cited by
6References
20Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jul 6, 2006 |
| Grant date | Sep 4, 2012 |
| Priority date | — |
| Expiry date | Mar 5, 2030 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04R2499/11
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A microphone assembly is provided that includes a condenser transducer element having a displaceable diaphragm and a back-plate. The displaceable diaphragm and the back-plate are arranged to form a capacitor in combination. A preamplifier circuit has an input stage, the input stage comprising a P-type field effect transistor. The displaceable diaphragm and the back-plate are operatively connected between a source input and a gate input of the P-type field effect transistor.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.