Transponder for an automatic vehicle identification system

Details Transponder for an automatic vehicle identification system Transponder for an automatic vehicle identification system

H - Electricity

04

Q

343/20

H04Q 9/00 (2006.01) A01K 11/00 (2006.01) B61L 25/04 (2006.01) G01S 13/74 (2006.01)

Patent

CA 1055588

A TRANSPONDER FOR AN AUTOMATIC VEHICLE IDENTIFICATION SYSTEM Abstract of the Disclosure This disclosure relates to an inductively powered type of electronic transponder for identifying a moving object passing an interrogation area. The transponder includes a tuned inductive-capacitive pick-up circuit for receiving interrogating signals. The picked up interrogating signals are rectified to produce d.c. operating power and are applied to a frequency divider for producing a frequency related transmission signal and clock data rate pulse. A latching circuit enables a shift register so that the clock pulses ser- ially shift out binary encoded data from the shift register. The encoded data is fed to a logic network which is coupled to a balanced switching amplifier for phase modulating the transmission signal for propagation into the interrogation area.

236837

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