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
Controller for internal combustion engine
Lettuce sister lines PX06514083, PX06514153, PX06514201 and PX06514204
Implicit certificate scheme
Undercabinet plug-in mount
Electrode structure and its manufacturing method, and semiconductor module
Resource capacity monitoring and reporting
Engineered nucleic acids encoding a modified erythropoietin and their expression
  Randomly Featured Patents
Content reproducing device and content preproducing method
Scooter board
Systems, methods, and apparatus for split-band filtering and encoding of a wideband signal
Putter head
Silatrane derivative, method for manufacturing same, adhesion promoter, and curable silicone composition
Dispenser housing
Reticle box transport cart
Diamond cold cathode
Process for annealing ferrous wire
Lactone compounds containing an indolizine radical