Patent
Transponder for electromagnetic detection system with non-linear circuit
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TLDR
A detection wafer with a non-linear circuit for an electromagnetic detection system wherein two different transmission frequencies are used, comprising a resonant circuit connected to a nonlinear element forming from the transmission frequencies, a third frequency to be detected.Abstract:
A detection wafer with a non-linear circuit for an electromagnetic detection system wherein two different transmission frequencies are used, comprising a resonant circuit connected to a non-linear element forming from the transmission frequencies, a third frequency to be detected. The non-linear element forms part of an amplifying semiconductor circuit connected to a supply battery and having an input circuit coupled to the resonant circuit, and an output circuit comprising a coil magnetically coupled to the coil of the resonant circuit, the resonant frequency bandwidth of the resonant circuit comprising both transmission frequencies and the frequency to be detected.read more
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Patent
Radio frequency data communications device
James E. O'Toole,John R. Tuttle,Mark E. Tuttle,Tyler A. Lowrey,Kevin M. Devereaux,George E. Pax,Brian P. Higgins,David K. Ovard,Shu-Sun Yu,Robert R. Rotzoll +9 more
TL;DR: A radio frequency identification device comprises an integrated circuit including a receiver, a transmitter, and a microprocessor as discussed by the authors, where the receiver and transmitter together define an active transponder.
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References
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Resonant tag circuits having one or more fusible links
TL;DR: A planar resonant tag circuit is a tag circuit where the value of a circuit component can be electrically and selectively altered by one or more fusible links integrally formed with the planar circuit.
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