An amplification circuit includes a first group of amplifiers including N first amplifiers, a second group of amplifiers including K second amplifiers, a first terminal, a second terminal, and a third terminal. Each of the N first amplifiers and each of the K second amplifiers includes an output. The second group of amplifiers is divided into a first subassembly of amplifiers and a second subassembly of amplifiers. The first subassembly includes M second amplifiers of the second group. The second subassembly includes K-M remaining second amplifiers of the second group. The first terminal is coupled to each output of the N first amplifiers and to a first radio frequency output terminal. The second terminal is coupled to each output of the M second amplifiers. The third terminal is coupled to each output of the K-M second remaining amplifiers and to a second radio frequency output terminal.

A system for detecting a specific relative position between a reader and a receiver, including: an inductive contactless receiver including an antenna winding and a circuit for selectively modulating a load; an inductive contactless reader including: a transceiver antenna circuit having nonzero mutual inductance with the antenna winding for the position, a communication circuit connected to the transceiver antenna circuit, a receiver antenna circuit having mutual inductance with the antenna winding that exhibits a minimum for the position, and a processing circuit for: identifying presence of a receiver by detecting nonzero mutual inductance between the transceiver antenna circuit and an antenna winding, and detecting a mutual inductance minimum between the receiver antenna circuit and an antenna winding.

The present invention discloses a method and system for obtaining and tracking motions and gestures of a body part (e.g. a hand) of a user, by using antennas worn on the body (e.g. on a wrist band). The antennas may be near-field antennas which transmit and receive short-range electromagnetic fields. The electromagnetic fields may be modified by interaction with the body part, depending on the exact position of the body part. The modified electromagnetic field may be received by the antennas. The received signal may be processed, to provide additional spatial information (e.g. beamforming). The processed signal may be interpreted by pattern recognition (e.g. neural network, database table). The pattern recognition may be trained using labeled pair data (e.g. known hand positions and corresponding processed signals).

A boosted near field communication device includes an electronic circuit, a transceiver circuit, an interface coupling the electronic circuit with a host controller, and a memory containing a first information about an activation characteristic of the electronic circuit. The transceiver circuit is configured to determine a timing requirement of a reading device based on one or more request signals, activate the electronic circuit with energy obtained at least one of from an electromagnetic field generated by the reading device or from a battery on receiving a request signal from the reading device, and ensure that after activating the electronic circuit, the electronic circuit can receive and process a request signal from the reading device corresponding to the determined timing requirement by using the determined timing requirement and the first information about an activation characteristic.

A patient support apparatus, such as a bed, cot, stretcher, or the like, uses the ability to communicate with a device via near field communication to determine that the device is physically proximate the support apparatus. The support apparatus uses this determination to associate itself with the device. In some instances, the associated device is a mattress positioned on the support apparatus; a footboard on the support apparatus; a medical device used with a patient supported on the support device; a nearby piece of furniture; another patient support apparatus; or an ID tag worn by a caregiver or patient, or attached to a piece of equipment. After the support apparatus and device are associated, they communicate information between each other using far field communication, which supports higher data transfer rates. Flux concentrators are added in some embodiments to extend and/or shape the range of near the field communication.

Systems and methods for processing, transmitting and displaying data received from an analyte sensor, such as a glucose sensor, are disclosed. In an embodiment, a method for transmitting data between a first communication device associated with an analyte sensor and a second communication device configured to provide user access to sensor-related information comprises: activating a transceiver of a first communication device associated with an analyte sensor at a first time; and establishing a two-way communication channel with the second communication device; wherein the activating comprises waking the transceiver from a low power sleep mode using a forced wakeup from the second communication device.

A contact lens according to an embodiment of the present disclosure includes: a lens section that is worn on an eyeball; an acquisition section that is provided in the lens section and acquires biological information; and an output section that outputs the biological information acquired by the acquisition section to an external apparatus to be worn on a human body. The output section has one or a plurality of coil antennas extending along a front surface of the lens section, and a capacitor that is coupled to the one or the plurality of coil antennas in series or in parallel.

An input device includes a plurality of sensor electrodes, an antenna, and a shield trace disposed between at least some of the sensor electrodes and the antenna. The antenna may be coupled to a transceiver and may transmit and receive radio-frequency (RF) communication signals. The shield trace may reduce, at least in part, coupling of the RF communication signals from the antenna to the sensor electrodes. The plurality of sensor electrodes may determine a presence, and/or a motion associated with an input object.

A mobile device, a host device, and an X-ray detector are provided. The mobile device includes a first communicator configured to receive identification information of the X-ray detector from the X-ray detector, and a second communicator configured to send the received identification information of the X-ray detector to the host device.

A near field communication reader includes a receiver, a transmitter, a matching network, a reader antenna coupled to the matching network; a microcontroller coupled to the receiver and the transmitter, a microcontroller; and a non-transitory computer readable media coupled to the microcontroller and including code segments and data executable on the microcontroller to control a RF driver of the transmitter based upon loading level as determined, for example, by a field detector output and RF driver settings.