A wearable payment device, such as a finger ring worn by a user, communicates payment data to a payment reader that uses the payment data in order to request a payment transaction. Such wearable payment device may be conveniently carried by and accessible to the user such that utilization of the payment device for the payment transaction is less burdensome for the user, thereby encouraging use of the payment device for payments. Indeed, in some cases, such as when the payment device is implemented as a finger ring or other type of jewelry, the user may be encouraged to carry the payment device in an exposed manner such that it is readily available for the payment transaction without the user having to search in a wallet, pocket, or purse.

A method and system is described where a plurality of position reference devices use short-range wireless communication protocols to transmit positioning assistance data to nearby mobile devices, and the mobile devices use the assistance data to model errors and re-calibrate their positioning systems. The short-range communication methods include NFC, RFID, Bluetooth®, short-range 802.11, Wi-Fi Direct, and high frequency focused beams such as 60 GHz. The position reference devices are passive or active NFC tags, passive or active RFID tags, other devices that include such tags as their components, Bluetooth®-enabled devices, 60 GHz-enabled devices, and 802.11 access points that can lower their transmit power. The reference devices are located at various indoor and outdoor locations such as smart posters, kiosks, ATM machines, malls, store checkout counters, store security gates, wireless access points, cellular base-stations, tollbooths, traffic lights, and street lamp posts.

An electronic wireless communication device is provided, comprising: a wireless communication means for communicating with a wireless communication initiating device; means for monitoring a communication signal received by the wireless communication means; means for sending at least a first characteristic value relating to the communication signal received by the wireless communication means to at least one other electronic wireless communication device; means for receiving at least a further characteristic value relating to a communication signal received by the at least to one other electronic wireless communication device; and processing means for carrying out a comparison based on the first characteristic value and the further characteristic value, wherein the electronic wireless device is configured to selectively activate communication with the wireless communication initiating device based on the result of the comparison. A system and method is also provided for communicating between an electronic wireless communication device of a plurality of electronic wireless communication devices and a wireless communication initiating device that can read one of the electronic wireless communication devices.

A method of communicating between a first electronic communication device of a plurality of electronic communication devices and a wireless communication initiating device for reading the first electronic communication device. The method comprises receiving, at the first electronic communication device, a communication signal from the wireless communication initiating device and determining a first characteristic value relating to the communication signal. The method further comprises receiving at least a second characteristic value relating to a communication signal received by at least a second electronic communication device that is connected to the first electronic communication device and initiating communication with a reading device based on the first and second value.

An RF tag for sending data to a tag reader is described. The tag comprises an antenna to couple to an RF field of the tag reader and first and second resonant circuits, the first comprising a non-linear, adaptive resonator configured to automatically self-tune to a frequency of the RF field, the second a linear resonator. The tag also has a local power store. The tag powers up using the non-linear, adaptive resonator, which can automatically self-tune without an external power supply, and this resonator is used to charge the local power store. Once operational the tag switches to using a linear resonator for communicating with the tag reader.

A circuit for a passive RFID card, including an antenna for receiving an RF signal, an RFID chip for controlling an output of the RFID card, and a biometrics processing device separate from the RFID chip and having a fingerprint sensor, where the antenna has first and second pairs of terminals, where when the RF signal is received by the antenna, the first pair of terminals, receives the full voltage generated across the antenna and the second pair of terminals, receives a lower voltage than a voltage generated across the first pair of terminals, such that in a first mode of operation, the biometric sensor scans fingerprint data and compares it to pre-stored fingerprint data, and in a second mode of operation, the RFID chip communicates with an RFID scanner, and a switch is controlled such that the biometrics processing device is powered by the voltage generated across the first pair of terminals, when the circuit is operating in the first mode of operation, and such that the biometrics processing device is powered by the voltage generated across the second pair of terminals, in the second mode of operation.

In a management system of a game token coin, one RFID tag having a data non-rewritable region and a data rewritable region is imparted to the game token coin. The location relating information of the game token coin is stored in the data rewritable region. The system includes a writer configured to additionally write the location relating information, a reader configured to read the location relating information from a plurality of the game token coins, and a management controller configure to examine the information obtained from the reader. The management controller includes a function that determines whether a history of the location relating information obtained from the reader has no abnormality.

A method of communicating between a first electronic communication device of a plurality of electronic communication devices and a wireless communication initiating device for reading the first electronic communication device. The method comprises receiving, at the first electronic communication device, a communication signal from the wireless communication initiating device and determining a first characteristic value relating to the communication signal. The method further comprises receiving at least a second characteristic value relating to a communication signal received by at least a second electronic communication device that is connected to the first electronic communication device and initiating communication with a reading device based on the first and second value.

An internal voltage generation circuit of a smart card to perform fingerprint authentication and a smart card includes a first contact switch, a second contact switch, a switched capacitor converter and a bidirectional switched capacitor converter. The first contact switch selectively switches a contact voltage to a first node based on a first switching enable signal, in a contact mode. The second contact switch selectively switches the contact voltage to a second node based on a second switching enable signal, in the contact mode. The bidirectional switched capacitor converter steps down a first driving voltage of the first node to provide a second voltage to the second node in the contactless mode and either steps down the first driving voltage or boosts a second driving voltage of the second node based on a level of the contact voltage to provide a boosted voltage to the first node in the contact mode.

A device includes a first inductor and a second inductor. The first inductor has a first inductive coupling profile. A first circuit component is coupled to the first inductor. A second inductor has a second inductive coupling profile. A second circuit component coupled to the second inductor.