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
Eyeglasses
Strongly bound carbon nanotube arrays directly grown on substrates and methods for production thereof
Systems and methods for identifying similar documents
Cooling method and device for cooling a medium-voltage electrical installation in a protective sheath
RF amplifier with digital filter for polar transmitter
Mobile application for calendar sharing and scheduling
Data architecture and user interface for plasma processing related software applications
  Randomly Featured Patents
Image processing apparatus, image processing method, recording medium, and program
Method for identifying an agent which increases TGF-beta levels
Automatic operand load, modify and store
Processing of substrates with dense fluids comprising acetylenic diols and/or alcohols
Automatic rhythm performing apparatus with an enhanced musical effect adding device
Method of manufacturing a semiconductor device having a silicide layer
Shoe upper
System and method for image segmentation
High-pressure discharge lamp
Knitting machine with controllably rockable knock-over bits