Resources Contact Us Home Browse by: INVENTOR PATENT HOLDER PATENT NUMBER DATE     Quadrature signal conversion device Image Number 4 for United States Patent #5764171. A receiver including two sigma delta modulators used to convert a pair of analog quadrature signals into digital quadrature signals. In such sigma delta modulators the quantization noise is shifted into a frequency region in which no signal is present. A cross coupling between the filters is provided to improve the noise reduction without increasing the order of the filters. By providing the cross coupling, it is possible to obtain complex poles and zeros in the noise transfer function which do not have to appear in complex conjugate pairs which results in an increase of the noise suppression in a specified frequency range.       Recently Added Patents Quick record function in a smart pen computing system Multicodebook source-dependent coding and decoding Method of determination of receptor binding saturation effected by monoclonal antibodies Embolization Waste treatment process and apparatus Circuit board and manufacturing method thereof Method of wastewater flow measurement, system analysis, and improvement   Randomly Featured Patents Antithrombotic agents Toothed wheel type shed forming device for shuttle loom Thermal flow rate sensor supplying digital output Computer system with graphical user interface including spring-loaded enclosures Bicycle pedal Sprinkler head assembly Circuit protection arrangement Input nip roller system for external drum imaging system Water-soluble fluorochemical polymers for use in water and oil repellent masonry treatments Robotic decontamination apparatus © 2006-2008 PatentGenius. All Rights Reserved.