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:
Jun. 19, 2007
Filed:
May. 08, 2002
Applicants:
Joachim Brilka, Hamburg, DE;
Thomas Hafemeister, Hamburg, DE;
Wolfgang Weltersbach, Hamburg, DE;
Inventors:
Assignee:
NXP B.V., Eindhoven, NL;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H04N 5/50 (2006.01);
U.S. Cl.
CPC ...
Abstract
A down-converter for processing frequency signals, preferably received, particularly digital, television signals, comprising two, preferably identical mixer stages () for down-converting the signal, a local oscillator () controlling the mixer stages by a 90° phase shift, a complex filter () which couples the output signals of the mixer stages () by means of a complex filtering method in such a way that the signal components outside a predetermined useful band are substantially suppressed, an adjusting device () for adjusting the frequency of the local oscillator () and a subsequent low-pass filter.