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:
Dec. 26, 2006
Filed:
Jul. 24, 2002
Christian Grewing, Düsseldorf, DE;
Markus Hammes, Dinslaken, DE;
André Hanke, Düsseldorf, DE;
Giuseppe LI Puma, Bochum, DE;
Christian Grewing, Düsseldorf, DE;
Markus Hammes, Dinslaken, DE;
André Hanke, Düsseldorf, DE;
Giuseppe Li Puma, Bochum, DE;
Infineon Technologies AG, Munich, DE;
Abstract
A PLL circuit is tuned to a first frequency by using a first digital modulation signal and subsequently tuned to a second frequency by using a second digital modulation signal. A differential signal, that is a function of the change in voltage of a VCO control signal generated by the modulation signals, is compared with a comparison signal, that is characteristic of the analog modulation amplitude. Based on the comparison the analog modulation amplitude is changed to minimize or substantially eliminate a deviation between the signals.