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:
Sep. 30, 2008
Filed:
Dec. 21, 2004
Thomas Convent, Issum, DE;
Markus Hammes, Dinslaken, DE;
André Hanke, Düsseldorf, DE;
Giuseppe LI Puma, Bochum, DE;
Walter Mevissen, Düsseldorf, DE;
Thomas Convent, Issum, DE;
Markus Hammes, Dinslaken, DE;
André Hanke, Düsseldorf, DE;
Giuseppe Li Puma, Bochum, DE;
Walter Mevissen, Düsseldorf, DE;
Infineon Technologies AG, Munich, DE;
Abstract
The invention specifies a circuit arrangement with a phase locked loop (), which can be used as a mobile radio transmitter, in particular. The reference frequency for the PLL (), which is provided by means of the source (), is multiplied by a multiplier () and is down-converted to an intermediate-frequency level in a down-conversion mixer () using the output signal from the PLL, and is evaluated such that a modulator () connected to the input of the oscillator () can be trimmed. The inventive principle is used to advantage in two-point modulators and allows inexpensive, integratable mobile radio transmitters with good noise characteristics.