Push-pull electret transducer with controlled restoring force for low frequency microphones and energy harvesting
US11228844B2 · kind B2 · utility
1Cited by
5References
14Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | May 18, 2018 |
| Grant date | Jan 18, 2022 |
| Priority date | — |
| Expiry date | May 18, 2038 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04R2307/025
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
Provided is an energy harvesting system, including: a first electrode; a second electrode; a non-metalized mono-charged electret diaphragm disposed between the first and second electrodes; a base; a spring extending between the base and the electret diaphragm; and a rod in communication with the electret diaphragm and for manipulating a position of the electret diaphragm relative to the first and second electrodes.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.