Techniques for deactivating electronic article surveillance labels using energy recovery
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United States of America Patent
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Jul 31, 2007
Grant Date -
Dec 7, 2006
app pub date -
Jun 3, 2005
filing date -
Jun 3, 2005
priority date (Note) -
In Force
status (Latency Note)
Importance
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.
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