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
Apparatus and method for transferring a data signal propagated along a bidirectional communication path within a data processing apparatus
Securing information by hiding identity on a computing device
Method and system for detecting center pivot collision
Authentication method
System and method for identifying a target signal in an optical transport network frame structure
Far field telemetry operations between an external device and an implantable medical device during recharge of the implantable medical device via a proximity coupling
Rewriting branch instructions using branch stubs
  Randomly Featured Patents
Multiple activation-device launcher for a cementing head
Beading loom with removable warp thread cartridge
Liquid dispensing system with enhanced mixing
Contactless token with aperture
Method for converting thermal energy into mechanical work
Preparation of regio-regular copolymer of CO/olefin of at least three carbon atoms in the presence of tetraalkyl diphosphine
Self-synchronizing clock source for optical memories
Form tooling and method of forming semiconductor package leads
Inkjet printer with arcuately moveable simplex printhead and capping mechanism
Container for use in a bathroom