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
Wireless charging and communication with wireless communication devices in a communication system
Concrete saw
Inventory and patient management system
Methods of nourishing animals
Indexing structures using synthetic document summaries
Packaged semiconductor die with power rail pads
Oil recovery apparatus
  Randomly Featured Patents
Blood filter device and method of manufacturing the same
Method and a device for two-shaft force measurement and its application to the determination of tensile force in a continuous web
Debris collecting device
Computer-assisted configuring tool
Searching in a computer network
Apparatus for dissolving a solid material in a liquid
Method and apparatus for wellbore fluid treatment
Image processing apparatus and method for binarizing a multilevel image
Self-aligned trench DMOS transistor structure and its manufacturing methods
Electrochromic display device and electrodeposition-type display device