Circuit and method for driving a loudspeaker
US9826312B2 · kind B2 · utility
4Cited by
6References
18Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Oct 30, 2014 |
| Grant date | Nov 21, 2017 |
| Priority date | — |
| Expiry date | Jan 5, 2035 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04R29/001
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A circuit for driving a loudspeaker is disclosed. The circuit includes: a signal generator connected to the loudspeaker, generating a first signal comprising a first pulse with positive value and a second pulse with negative value; a detection circuit connected to the loudspeaker, detecting a second signal produced by the loudspeaker in response to the first signal; and a processing circuit connected to the signal generator and the detection circuit, calculating the impedance of the loudspeaker according to the second signal; wherein each pulse width of the first and second pulses is between 100 ns and 900 ns.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.