Abstract: Reference circuits for biasing radio frequency electronics are provided herein. In certain implementations, a gallium arsenide die includes a power amplifier configured to provide amplification to a signal, a reference voltage circuit including an output terminal that provides a reference voltage, and a mirror circuit configured to bias the power amplifier based on the reference voltage. The reference voltage circuit includes a bipolar transistor, a field effect transistor, and a circuit portion that generates a voltage that is proportional to absolute temperature. The reference voltage circuit generates the reference voltage based on a sum of a base-to-emitter voltage of the bipolar transistor, a turn-on voltage of the field effect transistor, and the voltage that is proportional to absolute temperature.

Abstract: A gallium nitride (GaN) radio frequency integrated circuit (RFIC) is configured to receive and amplify a low-level WiFi signal to generate a WiFi transmit signal. By using a GaN RFIC, the performance of the RFIC is significantly improved when compared to conventional RFICs for WiFi signals. In one exemplary embodiment, the RFIC has an error vector magnitude less than 29 dBc, an average power output around 29 dBm, and an average power added efficiency of greater than 25%. In additional embodiments, the RFIC has a gain greater than about 32 dB and a peak output power around ?37 dB.

Abstract: In order to achieve a circuit device capable of stably supplying an antenna with electric power in a broad power range to output a transmission signal, the circuit device includes a current source adapted to supply a first current in a first operation mode, and supply a second current higher than the first current in a second operation mode, and a drive section supplied with the electric power from the current source, and adapted to perform drive for outputting a transmission signal to an antenna via a matching circuit.

Abstract: In one aspect, the present invention provides methods and apparatuses for detecting that a wireless communication device in a serving cell is experiencing excessive interference variance, detecting a transmission pattern of interfering transmissions giving rise to such variance, and correspondingly adjusting scheduling of the device as a function of the detected transmission pattern, to at least partly avoid the interfering transmissions. An advantageous feature of such operation is that the determination of excessive interference variance and the determination of the transmission pattern associated with that varying interference can be done by a network node, e.g., the device's serving base station, or by the device, without requiring backhaul signaling or other inter-node cooperation in the network.

Abstract: Embodiments of this disclosure include methods in which spurs generated by the drifting of an oscillation frequency of an oscillation signal provided by a free-running oscillator may be minimized and/or eliminated from an output signal of a phase locked loop (PLL). Methods include minimizing the mixing gain between the oscillation signal and a power signal provided to the PLL. The oscillation signal and the power signal may be mixed in a phase frequency detector (PFD) included in the PLL. The minimizing of the mixing gain for the PFD also minimizes the degrading effect that the spurs have on the overall performance of the communications device. The mixing gain may be minimized by minimizing the impedance provided at nodes included in the PFD where the oscillation signal and the power signal mix. The mixing gain may also be minimized by maximizing the power supply rejection ratio for the PFD.

Abstract: A system and method for bridging user devices communicating according to a 3rd Generation (3G) communication protocol to a LTE wireless communication network, thereby enabling user devices that do not have sufficient signal strength for directly coupling to the LTE wireless communication network to nevertheless access such wireless communication systems and methods via a bridging system.

Abstract: An amplifier module includes a magnitude detector configured to detect a magnitude of a reflection coefficient, and a phase detector configured to detect a phase of the reflection coefficient. The magnitude detector includes an incident signal amplifier configured to amplify an incident signal, an output level controller configured control a level of an output of the incident signal amplifier, a reflected signal amplifier configured to amplify a reflected signal, and a comparator configured to compare an output of the incident signal amplifier with an output of the reflected signal amplifier to output a comparison result indicating whether the magnitude of the reflection coefficient is equal to or greater than a threshold determined based on the control signal.

Abstract: An electromagnetic Extremely High Frequency (EHF) communication chip includes one or more local oscillator circuits, a transducer circuit and at least one of a modulator or a demodulator coupled to the transducer circuit. Each of the local oscillator circuits may have a local oscillator and configured collectively to generate first and second carrier signals having respective first and second EHF frequencies. The first EHF frequency may be different than the second EHF frequency. The transducer circuit may have a first transducer for transmitting and receiving EHF communication signals. The modulator may be coupled to the local oscillator circuits for modulating the first carrier signal or the second carrier signal with a first transmit base data signal. The demodulator may be for demodulating the first carrier signal or the second carrier signal to produce a first receive base data signal.

Abstract: A display, such as for a touch-sensitive communication device, can include a transparent cover glass, pixels that emit light through the cover glass, and multiple antennas positioned along respective paths in an inactive area between the pixels. The antennas do not obstruct the light produced by the pixels, and can therefore be composed of opaque materials, such as metallic thin films, without affecting the optical properties of the display. In some examples, several antennas can have the same size and shape but different orientations, so that a radio can switch between or among the antennas to optimize reception. In some examples, the antennas can have different sizes and/or shapes, so that the antennas can send and/or receive radio signals in different frequency ranges of the electromagnetic spectrum. In some examples, locating the antennas in the display can allow the device to include a metallic housing.

Abstract: In accordance with one or more embodiments of the invention, methods and systems for facilitating data communication are presented. Requests to communicate data are received that include data indicative of a location of a target remote mobile computing device. A location to be searched for a target devices is determined, and location-based data of mobile devices is accessed. Potential target mobile devices are identified and data consistent with the request is sent to one or more potential targets.

Abstract: A frequency synthesizer and a method for frequency synthesis are provided. The frequency synthesizer includes a subband phase-locked loop (PLL) and a main PLL. A divisor of an adjustable non-integer frequency divider in the subband PLL is adjusted, and a channel frequency of a maximum frequency band of all frequency bands is output. A divisor of an adjustable integer frequency divider in the main PLL is adjusted, and a center frequency required for each frequency band of the all frequency bands is output. The center frequency and the channel frequency are mixed by a mixer to produce a band frequency. A quantization noise generated by the adjustable non-integer frequency divider is filtered out by the subband PLL to reduce the impact of the quantization noise on the main PLL.

Abstract: A method in a first electronic mobile device for adapting audio performance parameters is provided. The first electronic mobile device performs an audio interaction with a second electronic device. The first electronic mobile electronic device is associated with at least one earpiece comprising at least one speaker and at least one microphone. The method comprises detecting an acoustic echo between the at least one speaker and the at least one microphone, determining, based on the detected acoustic echo, position of the at least one earpiece in relation to a user of the first electronic mobile device, and adapting audio performance parameters, based on the detected position of the earpiece, whereby less echo during the audio interaction is achieved in the second electronic device.

Abstract: A first receiver of a victim communication device may detect a first signal from an aggressor transmitter that potentially may interfere with a second signal intended to be received at a second receiver of the victim communication device. It may be determined whether the first signal interferes with the second signal based, at least in part, on the characteristics of the first signal and the second receiver. If the first signal may interfere with the second signal, the second receiver may implement reconstruction and cancelation of the interference attributable to the first signal.

Abstract: Amplifiers with noise splitting to improve noise figure are disclosed. In an exemplary design, an apparatus (e.g., a wireless device, an integrated circuit, etc.) includes a plurality of amplifier circuits and at least one interconnection circuit. The amplifier circuits receive an input radio frequency (RF) signal. The interconnection circuit(s) are coupled between the plurality of amplifier circuits. Each interconnection circuit is closed to short the outputs or internal nodes of two amplifier circuits coupled to that interconnection circuit. The plurality of amplifier circuits may include a plurality of gain circuits coupled to a plurality of current buffers, one gain circuit and one current buffer for each amplifier circuit. Each amplifier circuit provides an output current, which may include a portion of the current from each of the plurality of gain circuits when the plurality of amplifier circuits are enabled.

Abstract: A wireless flash drive may use a Near Field Communication (NFC) radio link with a second device to establish a second, non-NFC, radio link with the second device, and then use the non-NFC link to wirelessly transfer data between the second device and the non-volatile memory in the flash drive. Some embodiments may also have other features, such as a switch to activate the non-NFC link without using the NFC link, a battery to power the non-NFC radio and the non-volatile memory, inductive charging circuitry to wirelessly recharge the battery, or instructions to be uploaded to the second device for use in establishing the non-NFC link.

Abstract: Methods and systems for beam forming, implemented in a base station used in a communication system, include measuring channel state information (CSI) for a number of active phased-array antennas less than a full number of phased-array antennas. Analog beam forming weights are determined using the measured CSI. An optimal digital precoder is determined from the analog beam forming weights. The analog beam forming weights and optimal digital precoder are applied to one phased-array antenna.

Abstract: A method and apparatus in which in an accessory device is adapted for attaching to a handheld device and the accessory device. A coupling is formed with a first input of the handheld device. User input is formed. A predetermined signal is formed to the first input of the handheld device responsive to the receiving of user input using the formed coupling independently of any conductive coupling with the handheld device.

Abstract: A wireless communications device that produces phase-synchronized local oscillator (LO) signals without dedicated LO phase alignment circuitry. The wireless communications device includes a first transceiver chain to receive a first timing signal and a second transceiver chain to receive the first timing signal and a second timing signal. The first transceiver chain includes a first frequency divider to convert the first timing signal to a first LO signal. The second transceiver chain includes a second frequency divider to convert the first timing signal to a second LO signal, a third frequency divider to convert the second timing signal to a third LO signal, and a multiplexer to select either the second LO signal or the third LO signal for transmitting wireless signals via the second transceiver chain based at least in part on an operating mode of the wireless communications device.

Abstract: A method and a supply modulator (SM) are provided for supplying power from a wireless transmitter to a radio frequency (RF) power amplifier. A power control signal input from a modem is received. A reference voltage is determined. An operating mode of the SM is changed by controlling a level of the reference voltage. A voltage is determined based on the level of a reference voltage. When the operating mode of the SM is an ET mode, a first output signal from a linear regulator and a second output signal from a switching regulator are combined to obtain a combined result, and the combined result is output. The first output signal is based on the voltage. When the operating mode of the SM is an APT mode, the voltage based on the reference voltage is output.

Abstract: A communication apparatus comprises a holding unit, a reception unit, and a transmission unit. The transmission unit can transmit both first application activation information and second application activation information that are the activation information held in the holding unit to an external apparatus which has transmitted the request, regardless of whether the request received by the reception unit is a request from the first external apparatus or from the second external apparatus, and the first application activation information is defined by a format compatible with a first control program, and the second application activation information is defined by a format compatible with a second control program.