Resources Contact Us Home
Self calibration of transponder apparatus

Image Number 2 for United States Patent #6529156.

A method and apparatus is provided for remotely and constantly calibrating a transponder by using the ring around phenomenon. A number of different time varying physical quantities, such as for example temperature, signal level, noise, transmission line flex, frequency, and general operational effects, affect the inherent delay in transponders on a time varying basis. The invention relies on a the ring around phenomenon to produce pulse doublets, wherein the distance between the pulses in the pulse doublets correspond to the instantaneous delay in the transponder. The system is configured so that instantaneous variation in the transmission delay is detected and recognized on a pulse by pulse basis and transmitted to the interrogation device, which then functions to calculate the actual delay. Normal operation of the transponder is not affected by the continuous calibration method, and therefore a special calibration mode is not required.

  Recently Added Patents
Polyester resin for toner, electrostatic charge image developing toner, electrostatic charge image developer, toner cartridge, process cartridge, image forming apparatus, and image forming met
Method for parking or exiting a parking bay and for avoiding a collision of a vehicle, and corresponding assistance systems and vehicle
Diaminocyclohexane compounds and uses thereof
Gas flow indicator
Pulsed plasma with low wafer temperature for ultra thin layer etches
Model matching for trace link generation
Method of and apparatus for evaluating an optimal irradiation amount of an electron beam for drawing a pattern onto a sample
  Randomly Featured Patents
Rotational molded articles, and method of making the same
Fault detection apparatus for a programmable controller
Photogate stack with nitride insulating cap over conductive layer
Liquid jet solids removal system for process vessels
Sleeping bag
Controlled destructive panel assembly
Semiconductor laser device and method for fabricating the same
Nitride-composite semiconductor laser element, its manufacturing method, and semiconductor optical device
Support for gas-phase oxidation catalyst and process for its production, gas-phase oxidation catalyst, and process for producing acrylic acid