Abstract: Disclosed herein is a tag suitable for use with pets and other animals. The tag may be a glass tag that includes an antenna, a first circuit block and a second circuit block. The antenna has a common core having a coil wound around the core. The coil interconnects a first antenna pad, a second antenna pad and a third antenna pad; a first circuit block having a first and a second contact pad, the first and second antenna pads interconnected to the first and second contact pads respectively. The second circuit block has a third and a fourth contact pads. The second and third antenna pads interconnected to the third and fourth contact pads respectively. The first circuit block may be an RFID integrated circuit and the second circuit block may be an NFC IC.

Abstract: Circuits and methods concerning radio frequency (RF) communication are disclosed. In some example embodiments, an apparatus includes a first antenna providing a signal path, having at least one loop, between a first pair of nodes. The apparatus also includes a second antenna providing a signal path, having one or more loops, between a second pair of nodes. The second antenna is placed sufficiently close to the first antenna to cause the second antenna to resonate in response to an RF signal being applied to the first pair of nodes by a communication circuit.

Abstract: The method of calibration of a second order intermodulation intercept point (IIP2) of a radio transceiver comprises the steps of: generating a second order intermodulation (IM2) reference signal (STXIM2-REF) from a transmission baseband signal (STXBB-REF); estimating a second order intermodulation power from the second order intermodulation reference signal (STXIM2-REF) and a radio transceiver output signal (Output); tuning a second order intermodulation intercept point tuner to find a lowest second order intermodulation power; extracting an optimum second order intermodulation intercept point corresponding to the lowest second order intermodulation power.

Abstract: The method of calibration of a second order intermodulation intercept point (IIP2) of a radio transceiver comprises the steps of: generating a second order intermodulation (IM2) reference signal (STXIM2-REF) from a transmission baseband signal (STXBB-REF); estimating a second order intermodulation power from the second order intermodulation reference signal (STXIM2-REF) and a radio transceiver output signal (Output); tuning a second order intermodulation intercept point tuner to find a lowest second order intermodulation power; extracting an optimum second order intermodulation intercept point corresponding to the lowest second order intermodulation power.