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. 18, 2008
Filed:
Aug. 12, 2004
Applicants:
Markus Hammes, Dinslaken, DE;
Giuseppe LI Puma, Bochum, DE;
Stefan Van Waasen, Sollentuna, SE;
Inventors:
Assignee:
Infineon Technologies AG, Munich, DE;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H03C 3/09 (2006.01); H03L 7/18 (2006.01);
U.S. Cl.
CPC ...
Abstract
A single-point modulator () has a PLL circuit () and a programmable frequency divider () whose control connection is connected to a circuit branch for injecting a digital modulation signal () which is arranged in the feedback path of the PLL circuit (). The circuit branch contains a sigma-delta modulator () which, in turn, has a digital filter () having a transfer function H(z). The noise transfer function NTF(z) of the sigma-delta modulator () is given by the function NTF(z)=1−H(z).