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:
May. 02, 2017
Filed:
Jun. 27, 2014
Ams Ag, Unterpremstaetten, AT;
Wolfgang Duenser, Rapperswil-Jona, CH;
Markus Bingesser, Eglisau, CH;
Thomas Froehlich, Ottikon, CH;
AMS AG, Unterpremstaetten, AT;
Abstract
An electric amplifier circuit for amplifying an output signal of a microphone comprises a supply input terminal (V) to apply a supply potential (VDDA) for operating the electric amplifier circuit and a differential amplifier () having a first input terminal (E) for applying the output signal of the microphone (), a second input terminal (E) and an output terminal (A) for outputting an amplified output signal (OUT) of the microphone (). A feedback path (FP) is provided between the output terminal (A) of the differential amplifier () and the second input terminal (E) of the differential amplifier (). A charge supplying circuit () is coupled to the feedback path (FP) to supply an amount of the charge to the feedback path (FP) in dependence on the supply potential (VDDA). The amount of charge supplied to the feedback path may be dependent on a change of the supply potential (VDDA).