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. 11, 2005
Filed:
Feb. 26, 2001
Applicant:
Rainer Storn, Kirchheim, DE;
Inventor:
Rainer Storn, Kirchheim, DE;
Assignee:
Infineon Technologies AG, Munich, DE;
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
H04M 100 ; H04M 900 ;
U.S. Cl.
CPC ...
Abstract
A filtering circuit is described for filtering out meter pulses of analog telephone communication, for example in analog modems. The circuit is mainly composed of resistors and capacitors and is configured as a double T element or a Wien bridge circuit. The filtering circuit is needed for attenuating interferences to such an extent that integrated circuits operating with low voltages are not overloaded.