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
Uplink synchronization management in wireless networks
High damage threshold frequency conversion system
Pipe coupling
Implantable defibrillator systems and methods with mitigations for saturation avoidance and accommodation
Vanadium, cobalt and strontium additives for use in aluminum back solar cell contacts
Pipette device
Polycarbonate resin composition and formed product thereof
  Randomly Featured Patents
Physician office viewpoint survey system and method
Combined skirt and shorts
Wireless communication device
Multiple and multivalent DNA vaccines in ovo
Method for making polyetherimide using a phenolic or carboxylic acid catalyst
Motorcycle or motorcycle replica
Coaxial flowpath apparatus
System and method for remote data acquisition and distribution
Animal ear protection apparatus
Regulator valve with spacing chamber