Hearing aid with a wireless transceiver and method of fitting a hearing aid

Patent metadata

Field	Value
Publication number	US-9124993-B2
Application number	US-201314099216-A
Country	US
Kind code	B2
Filing date	Dec 6, 2013
Priority date	Jun 17, 2011
Publication date	Sep 1, 2015
Grant date	Sep 1, 2015

Abstract

A hearing aid comprising a wireless transceiver ( 100 ) having an inductive antenna ( 101 ) and a trimming capacitor ( 104, 105, 300, 404 ) with at least two parallel signal paths, wherein at least one of said signal paths comprises a first capacitor ( 309, 310, 311, 312 ), a second capacitor ( 301, 302, 303, 304 ) and a switching transistor ( 305, 306, 307, 308 ) arranged such that the switching transistor ( 305, 306, 307, 308 ) is coupled in parallel with said first capacitor ( 309, 310, 311, 312 ) and coupled in series with said second capacitor ( 301, 302, 303, 304 ), whereby the voltage drop across the switching transistor ( 305, 306, 307, 308 ), when the switching transistor is set to off, will be lower than the voltage applied across the trimming capacitor ( 104, 105, 300, 404 ) due to voltage division between said first capacitor ( 309, 310, 311, 312 ) and said second capacitor ( 301, 302, 303, 304 ). The invention also provides a method of fitting a wireless transceiver ( 100 ) for a hearing aid.

First claim

I claim:

1. A hearing aid comprising a wireless transceiver;
wherein said transceiver comprises a trimming capacitor having at least four parallel signal paths;
wherein each of said four signal paths comprises a parallel capacitor, a series capacitor and a switching transistor arranged such that the switching transistor is coupled in parallel with said parallel capacitor and said switching transistor and parallel capacitor are coupled in series with said series capacitor, whereb…

Assignees

• Widex As

Inventors

• Kilsgaard Soren

Classifications

• H04R25/554 Primary

  Electricity · mapped topic

• H04R25/00

  Electricity · mapped topic