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. 17, 1998
Filed:
Apr. 23, 1996
Erik Witthoefft Rasmussen, Meilen, CH;
Enrique Marcelo Blumenkrantz, Neuchatel, CH;
Phonak AG, Stafa, CH;
Abstract
A hearing aid with a mechanical/electrical input converter and an electromechanical output transducer. The hearing aid includes a signal processing unit with an input operationally connected to the output of the input converter. The signal processing unit includes a switched output unit with a switch over control input. The signal processing unit is operationally connected to the input of the output transducer and generates an output signal switched between at least two predetermined signal levels. The signal processing unit further includes a pulse width modulator unit which generates a pulse width modulated output signal. The output of the pulse width modulator unit is operationally connected to the switch-over control input of the switched output unit. The pulse width modulator unit includes a digital control input for controlling pulse width modulation.