Methods and apparatus for reduced distortion balanced armature devices
US8385583B2 · kind B2 · utility
6Cited by
29References
21Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Aug 28, 2009 |
| Grant date | Feb 26, 2013 |
| Priority date | — |
| Expiry date | Oct 6, 2031 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04R25/00
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
An example apparatus comprises a drive coil energizable by a drive signal, at least one permanent magnet, and at least one magnetic return path element for flux induced by the drive signal, the magnetic return path element, such as a balanced armature, being configured to provide a variable reluctance, so as to reduce nonlinearities in a displacement versus drive signal relationship. Modifying the reluctance versus flux properties of the magnetic return path of a transducer, e.g. the armature of a balanced armature device, allows compensation for nonlinearity arising in another part of the apparatus.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.