Techniques for deactivating electronic article surveillance...

Details Techniques for deactivating electronic article surveillance... Techniques for deactivating electronic article surveillance...

2007-07-31

2007-07-31

Hofsass, Jeffery (Department: 2612)

Communications: electrical

Condition responsive indicating system

Specific condition

C340S501000, C340S514000, C340S516000

Reexamination Certificate

active

11144522

ABSTRACT:
A deactivator having a deactivation antenna coil and a capacitor to store energy. The deactivator converts the stored energy to an alternating current over a deactivation period to generate a deactivation magnetic field when driven through the deactivation antenna coil during the deactivation period. The alternating current defines a ring down envelope during the deactivation period. An energy recovery module having an electrical impedance is coupled to the deactivator to recover a portion of the energy converted to the alternating current during a portion of the deactivation period based on the impedance. Other embodiments are described and claimed.

REFERENCES:
patent: 4263584 (1981-04-01), Spirig
patent: 6169483 (2001-01-01), Ghaffari et al.
patent: 2005/0093699 (2005-05-01), Leone
patent: 2006/0289641 (2006-12-01), Roesner

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