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. 23, 2016
Filed:
Mar. 18, 2013
Widex A/s, Lynge, DK;
Henning Haugaard Andersen, Birkerod, DK;
Niels Ole Knudsen, Humlebak, DK;
Widex A/S, Lynge, DK;
Abstract
A digital, three-level output driver () of the H-bridge variety for a hearing aid () obtains a reduced capacitive interference by providing a primary voltage () and a secondary voltage () for the output driver () and applying the secondary voltage () to both sides of the output driver () whenever the middle level of the three-level output driver () is present in the input signal for the output driver (). The output driver () may be controlled from a pulse-width modulated signal, a sigma-delta pulse-density modulated signal, or a combination of those signals. The output driver () produces a clocked output signal consisting of a positive level, a negative level, and a zero level for driving an acoustic output transducer of the hearing aid (). The invention provides a hearing aid () and a method of driving an output stage () of a hearing aid ().