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:
Jul. 13, 2010
Filed:
Oct. 14, 2004
Michael Deruginsky, Hillerod, DK;
Claus Erdmann Furst, Roskilde, DK;
Michael Deruginsky, Hillerod, DK;
Claus Erdmann Furst, Roskilde, DK;
AudioAsics A/S, Rosklide, DK;
Abstract
A microphone preamplifier, comprising a differential input () stage with a first and a second input terminal and an output stage with an output terminal; where the microphone preamplifier is integrated on a semiconductor substrate. A feedback circuit, with a low-pass frequency transfer function (), is coupled between the output terminal and the first input terminal and integrated on the semiconductor substrate. The second input terminal provides an input for a microphone signal (). Thereby a very compact (with respect to consumed area of the semiconductor substrate), low noise preamplifier is provided.