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. 10, 2015
Filed:
Dec. 21, 2010
Sebastian Loeda, Edinburgh, GB;
Sebastian Loeda, Edinburgh, GB;
Dialog Semiconductor GmbH, Kirchheim/Teck-Nabern, DE;
Abstract
A digital active noise cancellation circuit device () includes an oversampled, sigma-delta, A/D converter (), a digital decimation filter (), a digital intermediate filter (), a digital interpolation filter (), and a sigma-delta, D/A converter (). The device () is operative to perform the steps of: receiving () the analog noise signal (), converting () the analog noise signal into a digital noise signal (); transferring () the digital noise signal to a digital decimation filter, selectively bypassing () at least a portion of the digital decimation filter by transferring the digital noise signal to a digital intermediate filter (), processing () the digital noise signal in the digital intermediate filter to generate a digital anti-noise signal (), transferring () the digital anti-noise signal into a digital interpolation filter () operable to up-sample the digital anti-noise signal, selectively bypassing () at least a portion of the digital interpolation filter and converting () the digital anti-noise signal into an analog anti-noise signal ().