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:
Mar. 25, 2003
Filed:
Nov. 10, 1999
Applicant:
Inventor:
Stefan Heinen, Krefeld, DE;
Assignee:
Infineon Technologies AG, Munich, DE;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H03D 3/00 ; H04L 2/714 ;
U.S. Cl.
CPC ...
H03D 3/00 ; H04L 2/714 ;
Abstract
An FM receiver, which contains quadrature downward mixing to a low IF, analog IF polyphase filters in quadrature signal paths and an analog quadrature signal demodulator, has AC coupling in its two quadrature signal paths. At its output, the demodulator produces a voltage that is proportional to the input frequency and is supplied to the input of a decision circuit that determines the digital signal state. The circuit according to the invention can be used in DECT receivers.