Transponder useful in a system for identifying objects

G - Physics – 01 – S

Patent

Rate now

  [ 0.00 ] – not rated yet Voters 0   Comments 0

Details

343/20

G01S 13/82 (2006.01) B61L 25/04 (2006.01) G01S 13/75 (2006.01) G06K 7/00 (2006.01) G06K 19/07 (2006.01)

Patent

CA 1272787

TRANSPONDER USEFUL IN A SYSTEM FOR INDENTIFYING OBJECTS Abstract of the Disclosure A reader transmits interrogating rf signals to a transponder including an antenna having a particular impedance. The signals received by the antenna are converted to a direct voltage which is introduced to a first terminal of a switch such as an emitter of a semi-conductor device having conductive and non-conductive states of operation. A second terminal of the switch, such as the base of the semi-conductor device, receives a voltage variable between first and second magnitudes in accordance with a pattern of binary 1's and 0's in a data source such as a read-only memory (ROM). This pattern of binary 1's and 0's is individual to an object identified by the transponder. The variable voltage on the base of the semi-conductor device causes the emitter-collector current of the semi-conductor device to vary between first and second amplitudes. When this current has the first amplitude, the impedance of the semi-conductor device and the ROM substantially matches the antenna impedance. When this current has the second amplitude, the impedance of the semi-conductor device and the ROM is substantially greater than the antenna impedance. Capacitance may be connected to the collector of the semi-conductor device and the ROM to store energy in accordance with the current flow through the semi-conductor device. This stored energy provides for an energizing of the semi-conductor device and the ROM. A diode may be connected between the emitter and collector of the semi-conductor device to increase the second amplitude of the current through the semi-conductor device. *********

538986

LandOfFree

Say what you really think

Search LandOfFree.com for Canadian inventors and patents. Rate them and share your experience with other people.

Rating

Transponder useful in a system for identifying objects does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Transponder useful in a system for identifying objects, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Transponder useful in a system for identifying objects will most certainly appreciate the feedback.

Rate now

     

Profile ID: LFCA-PAI-O-1171634

  Search
All data on this website is collected from public sources. Our data reflects the most accurate information available at the time of publication.