Abstract: An RFID tag assembly and system including a first substrate, at least one passive loop disposed on the substrate, the passive loop being adapted to receive and transmit at least one RFID signal, and at least one RFID tag member, the tag member including a second substrate having first and second surfaces and at least one RFID tag disposed on the second substrate first surface, the second substrate second surface being removably secured to one of the first substrate surfaces proximate the passive loop, the RFID tag being coupled to the passive loop.

Abstract: An RFID tag assembly and system including a first substrate, at least one passive loop disposed on the substrate, the passive loop being adapted to receive and transmit at least one RFID signal, and at least one RFID tag member, the tag member including a second substrate having first and second surfaces and at least one RFID tag disposed on the second substrate first surface, the second substrate second surface being removably secured to one of the first substrate surfaces proximate the passive loop, the RFID tag being coupled to the passive loop.

Abstract: A RFID passive repeater system and apparatus comprising a RFID reader having a magnetic flux field, at least one RFID tag and at least one passive repeater member having at least one substantially continuous passive loop, the passive repeater member being adapted and positionable with respect to the RFID reader and the RFID tag to extend the redirect and/or extend the range of the magnetic flux field.

Abstract: A RFID passive repeater system and apparatus comprising a substrate, at least one passive loop disposed on at least one of the substrate surfaces, the passive loop being adapted to receive and transmit at least one RFID signal, and at least one RFID tag disposed proximate the passive loop, the tag being coupled to said passive loop.

Abstract: A tuned radio frequency (RF) amplifier includes serially connected input and output common emitter amplifiers with closed ac and dc loops for maintaining high input impedance and low output impedance. The closed ac loop includes a parallel resonant circuit which is connected to the input and capacitively coupled to the output and across which a small signal appears as the difference between the input and output signals. The collector of the input amplifier transistor is maintained at a constant voltage, thereby minimizing any Miller Effect feedback capacitance, and, therefore, any RF degeneration, at the input.

Abstract: An amplifier having a current determiner to provide an operating current depending on a reference current, the operating current being used to operate an input amplifying device. The output of the input amplifying device is further amplified by one or more devices in the current determiner. The current determiner has a pair of matched devices used to set the output current in response to the supplied reference current.