Resources Contact Us Home
Browse by: INVENTOR PATENT HOLDER PATENT NUMBER DATE
 
 
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
Differentiated PSIP table update interval technology
Sign language keyboard and sign language searching apparatus using the same
Systems and methods for restoring images
Communication system and data transmission method thereof
High throughput thin film characterization and defect detection
Liquid crystal display and method of driving the same
Synergistic compositions for the treatment of topical viral infections
  Randomly Featured Patents
Forensic for fingerprint detection in multimedia
Collection device with self sealing retention system
Method of constructing a rotor for a gyroscopic device
Feature size reduction in thin film magnetic head using low temperature deposition coating of photolithographically-defined trenches
Cement composition self-leveling floor coating formulations and their method of use
Method of producing a dismountable, reinforced plaster mold or plaster cast and means therefor
Method of evaluating magnetic recording medium and method of manufacturing magnetic recording medium
Three-layer gasket with primary and secondary sealing element
Photocoagulation apparatus
Powered testing of mixed conventional/boundary-scan logic