Resources Contact Us Home
Browse by: INVENTOR PATENT HOLDER PATENT NUMBER DATE
 
 
Photonic sigma delta analog-to-digital conversation employing dual heterojunction thyristors










Image Number 13 for United States Patent #7064697.

Interference caused by the propagation of a transmit signal transmitted from a transmit antenna to a receive antenna is effectively cancelled by an improved signal cancellation system. The system includes an interference cancellation signal generator that generates a time-delayed and amplitude-reduced representation of said transmit signal. A summing stage is operably coupled to the interference cancellation signal generator and the receive antenna. The summing stage subtracts the time-delayed and amplitude-reduced representation of the transmit signal from a receive signal to substantially cancel the interference. The interference cancellation signal generator preferably includes a novel programmable optical delay line that introduces a variable amount of optical delay to an optical signal derived from said transmit signal in addition to a thyristor-based sigma delta modulator that converts samples of the transmit signal to into a digital signal in the optical domain.








 
 
  Recently Added Patents
Flexible pouch
Method and structure for image local contrast enhancement
Fused thiazole derivatives as kinase inhibitors
Nanogap device for field enhancement and a system for nanoparticle detection using the same
Packaging
Obviation of recovery of data store consistency for application I/O errors
Air-fuel ratio control apparatus for an internal combustion engine
  Randomly Featured Patents
Method of and apparatus for measuring level and characteristics of a slag layer overlying a metallurgical metal
Circuits and methods for measuring cell voltages in battery packs
Compiler and compiling method
Newspaper vending machine
Light weight, strong, fire retardant dunnage platform bag and system of loading, dispensing and using bag
Chain saw
Method and apparatus for managing time in a satellite positioning system
Remedies for depression containing EP1 antagonist as the active ingredient
Distributed processing
Heat sink installing device