Resources Contact Us Home
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
Transmission device
Deadline-driven parallel execution of queries
Maize variety inbred PH1CD7
Disk drive with a subset of sectors with reduced write-to-read gap
High safety vehicular transportation system and operational method thereof
System and method for agitation of multiple specimen containers
System and method for providing restrictions on the location of peer subnet manager (SM) instances in an infiniband (IB) network
  Randomly Featured Patents
Core insertion method for making optical fiber preforms and optical fibers fabricated therefrom
Mobile terminal device
Golf ball and method of manufacturing the same
Package forming machine
Tray positioning arrangement for delivery system
Information recording medium, method and apparatus for manufacturing the same
Coffee roasting methods
Bending apparatus
Decoding technique for multidimensional codes