An example transaction card may include a sensor to measure movement of the transaction card and one or more processors to monitor the movement of the transaction card via the sensor during a tracking period; determine measurements of a gait of a user during the tracking period from the movement of the transaction card during the tracking period; compare the measurements of the gait of the user during the tracking period and a gait signature associated with the transaction card; and/or perform an action associated with the transaction card based on a result of comparing the measurements of the gait of the user during the tracking period and the gait signature.

Provided is a passive wireless magnetic field characteristic sensing tag and system, and a magnetic field quantity acquisition method, which integrates a passive magnetic field quantity sensor in a passive electronic tag and cooperates with a reader and a host computer to build a magnetic field sensing system, so as to realize high-precision and high-intelligence monitoring of the magnetic field quantity.

The invention relates to a network of communicating survey nails (10) that each comprise an active radiofrequency identification beacon, comprising: a stand-alone electrical power source for powering a transmitter and a storage means; the storage means for storing a unique identifier and nail position data; the transmitter of a radiofrequency signal compliant with an RFID protocol comprising said unique identifier and said nail position data, the transmitter comprising an antenna.

The invention also relates to a device (30) for recording topography, which comprises at least three nails (10) and a georeferencing device (36) comprising: a first communication means (361) using an RFID protocol, for receiving the radiofrequency signal comprising the unique identifier and the position data of each nail; and a triangulation means (363) configured to calculate the position of the georeferencing device with respect to the position of the three nails.

An internal voltage generator of a smart card and a smart card including the same. The internal voltage generator may include: a mode detector that generates a mode signal indicating a contact mode or a contactless mode; a low-drop out (LDO) regulator including an error amplifier, where the LDO regulator is responsive to the mode signal to: in the contact mode, drive the error amplifier with a second driving voltage to generate an error voltage, and regulate the second driving voltage based on the error voltage to generate a first output voltage, and in the contactless mode, drive the error amplifier with the first driving voltage to generate the error voltage, and regulate the second driving voltage based on the error voltage to generate the first output voltage.

A system and method for method for testing an energy harvesting tag, comprising: transmitting a harvesting signal to an energy harvesting tag at time T.sub.1; receiving a response signal from the energy harvesting tag at time T.sub.2; determining a capacitor charging time of the energy harvesting tag as a difference between T.sub.2 and T.sub.1; and assigning a pass value to the energy harvesting tag when the capacitor charging time is less than a predetermined threshold amount.

A wearable electronic device includes a watch body including a touch-sensitive display configured to receive a first input and a first wireless circuit configured to receive a wireless input signal. The wearable electronic device further includes a band coupled to the watch body and configured to attach the watch body to a user and a wireless module coupled to the band and including an input device configured to receive a second input and a second wireless circuit configured to transmit the wireless input signal to the first wireless circuit in response to receiving the second input.

Embodiments of the present disclosure generally relate to a wireless identification tag for association with a product to enable product self-identification and system and methods for use thereof. In one implementation, the tag may include at least one antenna tuned to receive energy transmitted at one or more frequencies within certain frequency bands. The tag may also include at least one transmitter that may be configured to send at least one identification signal. The tag may also include at least one circuit. The at least one circuit may be configured to detect whether energy is received in a certain frequency band, and to cause the at least one transmitter to operate in a mode corresponding to the certain frequency band.

Embodiments of the present disclosure generally relate to an appliance for holding electronically tagged products and for recording an association between the tagged products and the appliance, and system and methods for use thereof. In one implementation, the appliance may include a housing defining a cavity for retaining the electronically tagged products. The appliance may also include an exciter integrated with the housing and configured to trigger tags of the products to cause the tag of each product to transmit a unique tag ID. The appliance may also include a receiver for receiving transmission of each unique tag ID. The appliance may also include a communicator for outputting indications of identities of electronically tagged products retained in the cavity.

Disclosed is an electronic device, including: a switch element; and a memory card slot suitable for receiving a memory card. The memory card slot includes a power supply pin and a detection pin, and the power supply pin of the memory card slot being connected to a power supply through the switch element. The memory card slot has a first configuration where a memory card is received and a second configuration where there is no memory card. In the first configuration of the memory card slot, the detection pin of the memory card slot is in a grounded state, and in the second configuration of the memory card slot, the detection pin of the memory card slot is in a nongrounded state. The detection pin of the memory card slot is connected to the switch element and the detection pin in the grounded state can turn on the switch element.

An internal voltage generator of a smart card and a smart card including the same. The internal voltage generator may include: a mode detector that generates a mode signal indicating a contact mode or a contactless mode; a low-drop out (LDO) regulator including an error amplifier, where the LDO regulator is responsive to the mode signal to: in the contact mode, drive the error amplifier with a second driving voltage to generate an error voltage, and regulate the second driving voltage based on the error voltage to generate a first output voltage, and in the contactless mode, drive the error amplifier with the first driving voltage to generate the error voltage, and regulate the second driving voltage based on the error voltage to generate the first output voltage.