Distributed capacitance LC resonant circuit

Details Distributed capacitance LC resonant circuit Distributed capacitance LC resonant circuit

1984-11-06

1986-07-01

Swann, III, Glen R.

Communications: electrical

Condition responsive indicating system

Specific condition

336200, 333167, 333175, 333185, 333219, 340552, 343895, G08B 1324

Patent

active

045982767

ABSTRACT:
An electronic article surveillance system and a marker for use therein, which marker comprises a tuned resonant circuit including inductive and capacitive components formed of a laminate of a dielectric and conductive-multi-turn spirals on opposing surfaces of the dielectric, wherein the capacitive component is formed as a result of distributed capacitance between the opposed spirals, and wherein the circuit thereby resonates at at least two predetermined frequencies which are subsequently received to create an output signal.

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patent: 4369557 (1983-01-01), Vandebult
patent: 4555291 (1985-11-01), Tait et al.

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