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
Carbonyl-ene functionalized polyolefins
Image processing apparatus, image registering method, program causing computer to execute image registering method, and recording medium in which program is recorded
Electronic device including predicted frequency error estimation of a voltage controlled oscillator and related methods
Stock analysis method, computer program product, and computer-readable recording medium
Virtual multi-cluster clouds
Pausing a VoiceXML dialog of a multimodal application
Power converter and method including noise suppression by controlling phase shifting of converter cells
  Randomly Featured Patents
Self-centering vise for holding a sample in a laboratory instrument chamber
Hand-held physiological stimulation applicator
Method of achieving selective inhibition and control of adhesion in thick-film conductors
Electrically controlled load-responsive air braking system
Methods of treating diseased cells
Autonomous pulse reading and recording system
Compact affordable inert gas fire extinguishing system
Semiconductor device with one-side-contact and method for fabricating the same
Fitting arrangement for fastening of a steam joint
Display device for a medical tomographic image