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:
May. 29, 2007
Filed:
Aug. 23, 2005
Andrew W. Dornbusch, Austin, TX (US);
Andrew W. Dornbusch, Austin, TX (US);
Silicon Laboratories, Inc., Austin, TX (US);
Abstract
A PM/FM modulator () includes an analog-to-digital converter () having an input terminal for receiving an analog input signal, and an output terminal, and a direct digital frequency synthesizer () having an input terminal coupled to the output terminal of the analog-to-digital converter, and an output terminal for providing a modulated output signal. In one form, an FM stereo modulator () includes a digital stereo modulator () and a direct digital frequency synthesizer (). The digital stereo modulator () has a first input terminal for receiving a right analog input signal, a second input terminal for receiving a left analog input signal, and an output terminal for providing a digital signal having a stereo spectrum. The direct digital frequency synthesizer () has an input terminal coupled to the output terminal of the digital stereo modulator (), and an output terminal for providing a modulated output signal.