Integrated Eas/Rfid Device and Disabling Devices Therefor
An integrated electronic article surveillance (EAS) and radiofrequency identification (RFID) marker is provided which a semiconductor device which may he coupled to an antenna for receiving and retransmitting energy and signals to the antenna. A current receiving front end section of the semiconductor device communicates with at least one other section of the device so more than one function can be implemented upon receiving and retransmitting energy and signals. A first switch is operatively coupled to the front end section such that the functions are entirely but reversibly disabled upon closure of the first switch thereby effecting a reversible EAS function. A second switch is operatively coupled to the front end section such that at least one of the functions is at least partially disabled upon closure of the second switch. RFID functions of the marker am retained upon EAS deactivation.
1 . A semiconductor for use with an electronic article surveillance (EAS) and radio frequency identification (RFID) marker, the semiconductor comprising:
a current receiving portion which couples to an antenna and is configured to communicate with at least one other portion of the semiconductor such that a multiplicity of functions can be performed by the at least one other portion of the semiconductor upon receiving and retransmitting energy and signals from the antenna; and
at least one of a first switch operatively coupled to the current receiving portion such that the multiplicity of functions are disabled upon closure of the first switch and a second switch operatively coupled to the current receiving portion such that at least one of the multiplicity of functions is at least partially disabled upon closure of the second switch.
2 . The semiconductor according to claim 1 , wherein at least one of the first switch and the second switch includes a preset memory.
3 . The semiconductor according to claim 2 , wherein the preset memory sets a conduction state of at least one of the first switch and the second switch.
4 . The semiconductor according to claim 3 , wherein the conduction state can be set during active operation of the semiconductor and can be maintained when the device is in a power down state by a power controller having memory storage for storing the conduction state.
5 . The semiconductor according to claim 4 , wherein the power controller modulates at least one of the first switch and the second switch.
6 . The semiconductor according to claim 1 , wherein the current receiving-portion is a front end portion comprising:
a source electrode;
a drain electrode;
a modulation impedance and a first diode both of which being operatively coupled to the source electrode and to the drain electrode to form a parallel resonant inductive capacitive (LC) circuit; and
a second diode operatively coupled to the drain electrode such that the LC circuit forms a current rectifying circuit.
7 . The semiconductor according to claim 6 , wherein the current receiving portion further comprises a capacitor which enables frequency matching of the resonance frequency of the front end portion to the frequency of an interrogation signal when received from the antenna.
8 . The semiconductor according to claim 1 , further comprising an antenna electromagnetically coupled to the semiconductor and designed to receive and retransmit the energy and signal from and to the current receiving portion.
9 . An integrated electronic article surveillance (EAS) and radiofrequency identification (RFID) marker comprising:
an antenna;
a semiconductor adapted to couple to the antenna, and being configured to receive and transmit energy and signals to the antenna, the semiconductor including:
a current receiving end portion disposed in the semiconductor and configured to communicate with at least one other portion of the semiconductor such that a multiplicity of functions can be performed by the at least one other portion upon receiving and retransmitting the energy and signals from and to the antenna; and at least one of
a first switch operatively coupled to the current receiving portion such that the multiplicity of functions are disabled upon closure of the first switch; and
a second switch operatively coupled to the current receiving portion such that at least one of the multiplicity of functions is at least partially disabled upon closure of the second switch.
10 . The integrated marker according to claim 9 , wherein at least one of the first switch and the second switch includes a preset memory which sets a conduction state of at least one of the first and second switches.
11 . The integrated marker according to claim 10 , wherein the conduction state can be set during active operation of the semiconductor and can be maintained when the device is in a power down state by a power controller having memory storage for storing the conduction state.
12 . The integrated marker according to claim 9 , wherein the current receiving portion is a front end portion comprising:
a source electrode;
a drain electrode;
a modulation impedance and a first diode, both of which being operatively coupled to the source electrode and to the drain electrode to form a parallel resonant inductive capacitive (LC) circuit; and
a second diode operatively coupled to the drain electrode such that the LC circuit forms a current rectifying circuit.
13 . The integrated marker according to claim 12 , wherein the current receiving portion further comprises a capacitor which enables frequency matching of the resonance frequency of the front end portion to the frequency of an interrogation signal when received from the antenna.