Electronic article surveillance system using marker containing a distributed capacitance lc resonant circuit

Electronic article surveillance system using marker containing a distributed capacitance lc resonant circuit

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-multiturn spirals on opposing surfaces of the dielectric, wherein the capacitive c...

Ausführliche Beschreibung

Gespeichert in:
Bibliographische Detailangaben
Hauptverfasser: TAIT, WILLIAM C, O'BRIEN, PHILIP W
Format: Patent
Sprache:eng ; fre ; ger
Schlagworte:
ALARM SYSTEMS
BASIC ELECTRIC ELEMENTS
BASIC ELECTRONIC CIRCUITRY
CALCULATING
COMPUTING
COUNTING
ELECTRIC SOLID STATE DEVICES NOT OTHERWISE PROVIDED FOR
ELECTRICITY
HANDLING RECORD CARRIERS
IMPEDANCE NETWORKS, e.g. RESONANT CIRCUITS
ORDER TELEGRAPHS
PHYSICS
PRESENTATION OF DATA
RECOGNITION OF DATA
RECORD CARRIERS
RESONATORS
SEMICONDUCTOR DEVICES
SIGNALLING
SIGNALLING OR CALLING SYSTEMS
Online-Zugang:Volltext bestellen
Tags: Tag hinzufügen
Keine Tags, Fügen Sie den ersten Tag hinzu!
Beschreibung
Zusammenfassung: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-multiturn 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. An electrical connection is desirably provided between predetermined portions of the opposing spirals to lower the resonant frequencies.