The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Feb. 16, 2016
Filed:
Nov. 09, 2011
Helmut Theiler, Lieboch, AT;
Helmut Theiler, Lieboch, AT;
ams AG, Unterpremstatten, AT;
Abstract
In an embodiment, a circuit arrangement for active noise cancellation, comprises a first input (E) for supplying a playback signal (Spb), a second input (E) for supplying a sensor signal (Sanc), a first and a second terminal (A, A) 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 (Sanc, Sanc) as a function of the sensor signal (Sanc), wherein the first and the second input (E, E) are coupled to the first and the second terminal of the output (A, A) by means of the compensating device (Komp) in such a way that a virtual playback signal (Ssp) is provided at the first terminal (A) of the output (A, A) and a superposition signal (Ssp) is provided at the second terminal (A) of the output (A, A) such that a differential signal between the virtual playback signal (Ssp) and the superposition signal (Ssp) can be fed to the loudspeaker.