Circuit for energizing EAS marker deactivation device with DC pulses of alternating polarity
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United States of America Patent
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May 25, 1999
Grant Date -
N/A
app pub date -
Aug 13, 1998
filing date -
Aug 13, 1998
priority date (Note) -
In Force
status (Latency Note)
Importance
Abstract
A device for deactivating magnetomechanical EAS markers includes a storage capacitor and a coil for generating a deactivation field. A bridge arrangement of four switches interconnects the coil with the storage capacitor and with circuit ground. The switches are controlled to apply a train of DC pulses to the coil such that the pulses have alternating polarities and decreasing amplitudes.
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