Acoustical transducer with reduced parasitic capacitance
US6532293B1 · kind B1 · utility
8Cited by
13References
16Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Feb 8, 2000 |
| Grant date | Mar 11, 2003 |
| Priority date | — |
| Expiry date | Feb 8, 2020 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T29/49155
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
An acoustical transducer including a case and a support member, diaphragm, and backplate located within the case. The diaphragm is connected to the support member and is capable of vibrating. The backplate is mounted to the support member and is spaced a distance from the diaphragm to provide a gap between the backplate and the diaphragm. An electret material on the backplate cooperates with the diaphragm to develop a signal which is transmitted to an amplifier. By having an assembly wherein the backplate does not contact the diaphragm, the capacitance of the assembly is reduced.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.