In an embodiment a method for dynamic power control of a power level transmitted by an antenna of a contactless reader is disclosed. The method may include supplying a power to the antenna and performing at least one power adjusting cycle for adjusting a power level during a contactless transaction with a transponder, each power adjusting cycle including modifying the power supplied to the antenna to a predetermined level of power, performing a first measuring of a loading effect on the antenna at the predetermined level of power and adjusting the power level according to the measured loading effect.

A mounting base for use with a wirelessly locatable tag may include a base portion defining a latching member configured to engage a wirelessly locatable tag to releasably retain the wirelessly locatable tag to the mounting base, a contact block attached to the base portion and configured to be positioned at least partially within a battery cavity of the wirelessly locatable tag, the contact block defining a top side and a peripheral side. The mounting base may further include a first conductive member positioned along the peripheral side of the contact block and configured to contact a first battery contact in the battery cavity of the wirelessly locatable tag, a second conductive member outwardly biased from the top side of the contact block, the second conductive member configured to contact a second battery contact in the battery cavity of the tag, and a power cable coupled to the base portion.

A method for wirelessly receiving and transmitting electromagnetic radiation and to an electronic device thereof, the method including: wirelessly receiving a first electromagnetic radiation; storing energy of the received first electromagnetic radiation in an energy storage; determining, from the amount of energy stored, whether energy stored in the energy storage should be provided to a demodulator and a comparator and/or to a modulator and a transmitter such that they are switched; wirelessly receiving a second electromagnetic radiation; demodulating the second electromagnetic radiation so that a first signal is generated, comparing the first signal with a set of signals; wirelessly receiving a third electromagnetic radiation; modulating the third electromagnetic radiation into a fourth electromagnetic radiation by using two different modulations, thereby modifying data contained in the third electromagnetic radiation; and wirelessly transmitting the fourth electromagnetic radiation.

Signal power management circuits and smart cards including the same are provided. For example, a signal power management circuit comprises a rectifier that is configured to rectify a received radio frequency signal and output a first rectified voltage, a first regulator that is configured to maintain the first rectified voltage at a predetermined first voltage level, and a second regulator that is configured to receive an output of the first regulator and maintain a second rectified voltage different from the first rectified voltage at a predetermined second voltage level. A signal detector of the signal power management circuit is configured to receive the first rectified voltage and the second rectified voltage and detect a signal component of the received radio frequency signal on the basis of a difference between the first voltage level of the first rectified voltage and the second voltage level of the second rectified voltage.

A multimedia card includes a substrate, and a main control chip, a memory chip, and an interface contacts that are disposed on the substrate. The main control chip and the memory chip are covered with a packaging layer. The interface contacts includes a power contact, configured to receive a first voltage that is input from the outside; and a transformer circuit is further disposed on the substrate, is coupled to the interface contacts, the main control chip, and the memory chip, and is configured to convert the input first voltage into a second voltage, to provide two types of power supplies with the first voltage and the second voltage for the main control chip and the memory chip. In the foregoing manner, an area of the multimedia card is reduced, and a quantity of working modes of the multimedia card increases.

Various aspects of the disclosure generally relate to point-of-sale credit card processing devices. More specifically, the disclosure relates to synchronizing device communications with other device functions in order to reduce cross-platform interference and meet certification requirements.

An integrated circuit, a wireless communication card and a wiring structure of an identification mark are provided. The integrated circuit includes a power supply wiring, a ground wiring and at least one identification mark pattern. Each identification mark pattern has a first conductive wiring and a second conductive wiring that overlap each other, wherein the first conductive wiring is electrically connected to the power wiring, and the second conductive wiring is electrically connected to the ground wiring.

Systems, methods, and computer-readable media are disclosed for optimizing power consumption for smart electronic tracking tags. Example methods may include determining a destination address for a package, determining a shipping timeline for the package, the shipping timeline having a first segment and a second segment, and determining a transmission profile with a first frequency of package information data transmissions during the first segment and a second frequency of package information data transmissions during the second segment. Example methods may include sending the transmission profile to an electronic shipping tag associated with the package.

Embodiments described herein involve methods of forming an interactive card with indicators on a substrate. A plurality of indicators are formed on the substrate by way of a printed electronics process. A plurality of displaceable regions of piezoelectric material are formed on the substrate by way of a printed electronics process. Electrical interconnections are formed on the substrate by way of a printed electronics process, the electrical interconnections connecting an indicator and an associated displaceable region of piezoelectric material such that displacement of the associated displaceable region of piezoelectric material generates a voltage therein that is provided to the indicator in order to actuate the indicator and thereby indicate displacement of the associated displaceable region of piezoelectric material.

Methods and apparatuses for selecting a subset of RFID tags are provided in some embodiments. These methods and apparatuses utilize the susceptibility to light by persistent nodes found in passive tags. Light can be used to intentionally reduce persistence times in a particular subset tags or even an individual tag. Then, persistent nodes can be used as a selection criterion to distinguish previously illuminated tags from non-illuminated tags. In other embodiments, a power circuit receives a RF input source and generates a direct current (DC) output voltage. The circuit includes a bias circuit to supply a gate to source bias, which is independent of the DC output voltage. The circuit further includes a voltage multiplier circuit that is coupled to the bias circuit. The voltage multiplier circuit has MOS transistors with one transistor to receive the gate to source bias.