Circuit arrangement and method for active noise cancellation
US9263024B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Nov 9, 2011 |
| Grant date | Feb 16, 2016 |
| Priority date | — |
| Expiry date | Oct 6, 2032 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG10K2210/3027
- WIPO fieldOther consumer goods
- WIPO sectorOther fields
Abstract
In an embodiment, a circuit arrangement for active noise cancellation, comprises a first input (E1) for supplying a playback signal (Spb), a second input (E2) for supplying a sensor signal (Sanc), a first and a second terminal (A1, A2) of an output that is designed for being connected to a loudspeaker (Lsp) and a compensating device for respectively generating a first and a second noise signal (Sanc1, Sanc2) as a function of the sensor signal (Sanc), wherein the first and the second input (E1, E2) are coupled to the first and the second terminal of the output (A1, A2) by means of the compensating device (Komp) in such a way that a virtual playback signal (Ssp1) is provided at the first terminal (A1) of the output (A1, A2) and a superposition signal (Ssp2) is provided at the second terminal (A2) of the output (A1, A2) such that a differential signal between the virtual playback signal (Ssp1) and the superposition signal (Ssp2) can be fed to the loudspeaker.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.