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
Method and apparatus for determining storage capacity error for a data storage device
Method of manufacturing semiconductor devices using ion implantation
Method for selective deposition of a semiconductor material
Encoder that optically detects positional information of a moving body from different optical paths lengths
Low-staining room temperature curable coating composition
Method for carrying out a chemical reaction
Method for detecting directions of regularity in a two-dimensional image
  Randomly Featured Patents
Gage
Sequential activation delay line circuits and methods
Extracting signal components in radio system receiver
Bicycle
Molecular scaffolds for HIV-1 immunogens
Intake nozzle for a pump
Dirt seal for removable rubber belts
Fixing apparatus, printing apparatus, and computer readable medium storing a program for detecting twine
Structural cap with composite sleeves
Laminar flow control airfoil