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:
Nov. 25, 2014
Filed:
Dec. 19, 2011
Thomas Froehlich, Wattwil, CH;
Wolfgang Duenser, Rapperswil-Jona, CH;
Thomas Froehlich, Wattwil, CH;
Wolfgang Duenser, Rapperswil-Jona, CH;
AMS AG, Unterpremstätten, AT;
Abstract
A microphone amplifier comprises an input terminal (E) for applying an input signal (IN), an output terminal (A) for outputting an output signal (OUT), and an additional output terminal (A) for outputting an additional output signal (VBIAS). The microphone amplifier also contains an amplifying circuit () for generating the output signal (OUT) by amplifying the input signal (IN), wherein the amplifying circuit () is connected between the input terminal (E) and the output terminal (A), and a voltage generator () for generating the additional output signal (VBIAS). A supply voltage terminal (V) of the voltage generator () is connected to the output terminal (A) of the microphone amplifier. Since the amplifying circuit () makes available a supply voltage (V) for the voltage generator (), the microphone amplifier can be operated without a separate supply voltage terminal.