Apparatus and method for selectively driving a piezo transducer
US8525685B2 · kind B2 · utility
0Cited by
3References
5Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | May 27, 2010 |
| Grant date | Sep 3, 2013 |
| Priority date | — |
| Expiry date | Mar 17, 2032 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04R17/00
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
Devices and methods are provided for selectively driving a piezo transducer to operate as a pressure pattern detector or an alarm generator. In one embodiment, there is provided a device that includes: a piezo transducer; a comparator coupled to the transducer and a reference voltage; and a pressure pattern recognition circuit coupled to a comparator output of the comparator. The pressure pattern recognition circuit may be configured to: (i) determine whether the pressure pattern satisfies a predetermined condition; and (ii) in response to the pressure pattern satisfying the predetermined condition, generate an output signal.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.