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:
Jan. 20, 1998
Filed:
Mar. 22, 1995
Applicant:
Inventors:
Assignee:
Siemens Augiologische Technik GmbH, Erlangen, DE;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
H04R / ;
U.S. Cl.
CPC ...
381 684 ; 381 682 ;
Abstract
A hearing aid that has an analog part with a Class D final amplifier stage for audio signal processing, a digital part with an interface, a memory stage as well as supply stage for generating the voltage and control signals. The hearing aid has a utilized integrated circuit which also includes a pre-amplifier stage with two inputs respectively connected to a microphone and a telephone coil, the signals from the two inputs being selectively pre-amplified individually or in common, with selectable or programmable gains. This gives the hearing aid a small structural size, a comprehensive functionality, versatile adaptability and especially low energy consumption.