Communications: electrical – Continuously variable indicating – With meter reading
Patent
1981-09-08
1982-12-14
Yusko, Donald J.
Communications: electrical
Continuously variable indicating
With meter reading
340 38L, 343 68R, H04Q 900
Patent
active
043640435
ABSTRACT:
A system for the remote identification of objects using near-field electromagnetic coupling between an interrogator a transponder and a receiver in which a reply carrier at a subharmonic of the interrogation frequency is obtained by regulating, with minimum energy loss and synchronously with the interrogator signal, the energy exchange process between the transponder coupling element and a complementary storage element, and further varying, also with minimum energy loss and synchronously with the resultant oscillation waveform, the said energy exchange process so that the reply carrier becomes modulated with an information bearing code, the modulation rate being not constrained by the transponder tuned circuit bandwidth.
REFERENCES:
patent: 3290675 (1966-12-01), Neild
patent: 3859624 (1975-01-01), Kriofsky et al.
patent: 3944928 (1976-03-01), Augenblick et al.
patent: 3964024 (1976-06-01), Hutton et al.
patent: 4040053 (1977-08-01), Olsson
patent: 4114151 (1978-09-01), Denne et al.
patent: 4129855 (1978-12-01), Rodrian
patent: 4196418 (1980-04-01), Kip et al.
patent: 4314373 (1982-02-01), Sellers
Cole Peter H.
Eshraghian Kamran
Roy Ashim K.
The University of Adelaide
Yusko Donald J.
LandOfFree
Efficient object identification system does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Efficient object identification system, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Efficient object identification system will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-1203357