Abstract: Apparatuses and methods of differential driving of adjacent electrodes for low electromagnetic interference (EMI) for scanning a touch panel are described. One apparatus generates an in-phase drive signal and an opposite-phase drive signal and applies, at a substantially same time, the in-phase drive signal to a first transmitter electrode and the opposite-phase drive signal to a second transmitter electrode adjacent to the first transmitter electrode. The apparatus receives a first sense signal from a first receiver electrode and a second sense signal from a second receiver electrode adjacent to the first receiver electrode. The apparatus combines the first sense signal and the second sense signal to obtain a third sense signal. The third sense signal represents a first self capacitance associated with the first receiver electrode. The apparatus detects a presence of an object on a touch panel using at least the first self capacitance.

Abstract: Core transmit suspension is provided in multiple core wireless devices, systems, and methods. A first wireless device may transmit a plurality of data packets by a first core and a second core of the first wireless device to a second wireless device at a data rate. A data packet may be transmitted by at least one of the first core or the second core. The first wireless device may receive a first core acknowledgement (ACK) of the data packet by the first core and a second core ACK of the data packet by the second core from the second wireless device. The first wireless device may determine that a function of a power metric of the first core ACK and a power metric of the second core ACK satisfies a threshold to produce a result. The first wireless device may suspend, while the data rate sustains, transmission of the plurality of data packets by a suspended core of the first core or the second core based on the result.

Abstract: A USB controller includes: a USB interface that receives an isochronous timestamp packet (ITP) from a host device that includes a current time value from the host device and a delay value associated with each hub through which the ITP passed; controller hardware that initiates a counter, sends a link delay measurement (LDM) link management packet (LMP) request to a nearest upstream hub, stores a first timestamp that corresponds to when the LDM LMP request was sent, receives an LDM LMP response from the nearest upstream hub, and stores a second timestamp that corresponds to when the LDM LMP response was received; and controller software that calculates a link delay between the USB controller and the nearest upstream hub based on the first and second timestamps and delay information included in the LDM LMP response, and adjusts the counter value based on the calculated link delay.

Abstract: A processing device scans a capacitive sense array to determine a characteristic of a noise signal. A processing device further detects a location of a touch proximate to the capacitive sense array by a passive touch object using a first mode of capacitance touch detection. The first mode of capacitive touch detection uses a capacitive coupling of the noise signal to the capacitive sense array through the passive touch object to detect the touch.

Abstract: Apparatuses and methods of capacitance-to-digital code conversion are described. One apparatus includes a bridge circuit and a modulator front-end circuit. The bridge circuit includes a first terminal to couple to a reference cell and a second terminal to couple to a sensor cell. The modulator front-end circuit includes a comparator coupled to the bridge circuit, a first modulation capacitor coupled to a first input of the comparator, and a second modulation capacitor coupled to a second input of the comparator. The modulator front-end circuit provides a digital bitstream. A duty cycle of the digital bitstream is representative of a ratio between a capacitance of the sensor cell and a reference capacitance of the reference cell.

Abstract: Apparatuses and methods of capacitance-to-digital code conversion are described. One apparatus includes a bridge circuit and a modulator front-end circuit. The bridge circuit includes a first terminal to couple to a reference cell and a second terminal to couple to a sensor cell. The modulator front-end circuit includes a comparator coupled to the bridge circuit, a first modulation capacitor coupled to a first input of the comparator, and a second modulation capacitor coupled to a second input of the comparator. The modulator front-end circuit provides a digital bitstream. A duty cycle of the digital bitstream is representative of a ratio between a capacitance of the sensor cell and a reference capacitance of the reference cell.

Abstract: A method can include transmitting a request with a request integrity code (IC), receiving a first message at a time t2, executing a validation operation on the first measurement message that includes an operation on at least a portion of the first measurement message with a key. In response to the first measurement message being determined invalid, indicating time t2 as invalid. A second measurement message can be transmitted at a time t3. A third measurement message can be received that includes two remote time values t1 and t4. In response to times t1 to t4 being determined to be valid, a first distance value can be calculated with the times t1 to t4. First and second messages can include ICs generated by executing the operation on the corresponding messages with the key. Corresponding devices and systems are also disclosed.

Abstract: A primary-side-controlled fly-back converter is provided to eliminate cross-conduction between a power-switch (PS) on a primary side and a synchronous-rectifier (SR) on a secondary side when operating in continuous conduction mode (CCM). Generally, the converter includes a transformer having a primary coupled to a rectified AC input through the PS, and a secondary coupled to a DC output through the SR, the SR having a drain coupled to the secondary winding. A fly-back-controller includes a primary-controller operable to control a duty cycle of the PS, and a secondary-controller operable to turn OFF the SR when the PS turns ON in CCM. The secondary-controller includes a CCM zero-crossing-detector comparator having a first input coupled to the drain of the SR through a capacitor, and is operable to detect a sharp change in a drain voltage when the PS turns ON during CCM, and to output a signal to turn OFF the SR.

Abstract: An example voltage controlled oscillator includes an inductor, a capacitor coupled to the inductor, and a signal source coupled to the inductor and the capacitor to sustain an oscillating signal. The voltage controlled oscillator includes a first varactor coupled to the inductor and the capacitor, wherein the first varactor is biased by a first bias voltage and is configured to change a frequency of the oscillating signal based on a first control voltage signal. The voltage controlled oscillator includes a second varactor coupled to the inductor, the capacitor, and the first varactor, wherein the second varactor is biased by a second bias voltage and is configured to compensate temperature variation of the frequency of the oscillating signal over a plurality of frequency bands based on second control voltage signal.

Abstract: Systems and methods for translation and transmission of video and audio data over a first-in-first-out interface (FIFO) in a field programmable gate array (FPGA) are provided. The method includes receiving audio and video data including a number of video frames, each with a plurality of video lines separated by a line blanking interval. A first video line is translated and transmitted to a packet-based network through the FIFO in the FPGA while concurrently buffering the audio data in an audio buffer in the FPGA. Next, at least a portion of the audio data in the audio buffer is transmitted to the packet-based network through the FIFO during the line blanking interval separating the first video line from a second video line. Where video frames are separated by frame blanking intervals the method further includes transmitting through the FIFO any data remaining in the buffer after the preceding line blanking interval.

Abstract: A fly-back converter and method of operating is provided to eliminate cross-conduction between a power-switch (PS) on a primary side of a transformer and a synchronous-rectifier (SR) on a secondary side when operating in continuous conduction mode. Generally, the method includes turning on the SR when a drain voltage of the SR drops to a negative voltage followed by a rise in the SR-drain-voltage at a first slope as a current is drawn from the secondary side of the transformer through the SR. When the PS is turned on before the transformer is completely discharged cross-conduction causes a change in the rise of the drain voltage to a second slope greater than the first slope. By turning off the SR within 50 ns of the change in the rise of the drain voltage, cross-conduction is minimized or eliminated without receiving turn-on information from a controller operating the PS.

Abstract: Implementations disclosed describe systems and methods to optimize allocation of wireless subcarriers to station devices in wireless networks. In an example implementation, the disclosed techniques may include determining, by a station device in a wireless network, that a current set of wireless subcarriers, allocated by an access point device of the wireless network for the station device, is to be changed, generating, by the station device, a feedback information characterizing a current state of one or more of the wireless subcarriers, and sending, by the station device, the feedback information to the access point device.

Abstract: A method may include designating selected stages of a power amplifier as active stages. Each active stage includes a tristate inverter having a high side switch and a low side switch connected to the high side switch at a drain node; and a capacitor connected in series with the tristate inverter. The method includes enabling a high side switch of an active stage in a high side state, enabling a low side switch of the active stage in a low side state, and disabling the high side switch and the low side switch while in a floating state while transitioning from at least one of the high side state to the low side state or the low side state to the high side state.

Abstract: A hydrometer device according to an example includes a floating waterproof device container, and a liquid level sensor positioned in the device container to sense an immersion level of the device container when the device container is floating in a container of liquid. The hydrometer device further includes a conversion circuit positioned in the device container to convert the sensed immersion level to a digital value, and a controller positioned in the device container to determine a liquid density value for the liquid based on the digital value.

Abstract: A wireless system includes a first device in operative communication with an master device over a first link, and a second device to eavesdrop transmissions from the master device to the first device. The wireless system, based on a reference clock signal, adjusts at least one of a first clock signal for the first link and a second clock signal for a second link between the second device and the first device.

Abstract: A device may generate network profile data indicating a set of network parameters detected by the device. The device may encrypt the network profile data and may transmit the encrypted network profile data to a network device, such as a router, or a server. The router or server may analyze the encrypted network profile data to determine if the device is secure. The router of server may perform one or more security measures if the device is not secure.

Abstract: A sensor package includes at least one die, a fingerprint sensor, a mold material, and a land grid array. The fingerprint sensor is electrically coupled to the at least one die. The mold material encapsulates the at least one die. The land grid array layer is electrically coupled to the at least one die. The land grid array layer, the fingerprint sensor, and the mold material each include a common footprint.

Abstract: A method can include monitoring at least one non-primary advertising channel for packets; determining if any of the packets received during a same periodic advertising interval of a periodic advertising link include synchronization data; in response to acquiring a packet with synchronization data, extracting synchronization data from the packet with synchronization data; and synchronizing to the periodic advertising link with the synchronization data to determine timing for at least one download window in each periodic advertising interval. The periodic advertising interval includes a plurality of periodic sub-intervals and the at least one download window corresponds to at least one of the sub-intervals. Corresponding devices and systems are also disclosed.

Abstract: A capacitance sensing device includes a transmit (TX) generator for generating a sequence of receive (RX) signals by applying each TX signal pattern in a sequence of TX signal patterns to a set of sensor electrodes. For each TX signal pattern in the sequence of TX signal patterns, and for each subset of three or more contiguous sensor electrodes of the set of sensor electrodes, the TX generator applies to the subset one of a first excitation signal and a second excitation signal. The plurality of subsets includes at least half of the sensor electrodes in the set of sensor electrodes. The capacitance sensing device also includes a sequencer circuit coupled with the TX generator. For each TX signal pattern in the sequence of TX signal patterns, the sequencer circuit determines a next subsequent TX signal pattern in the sequence based on a circular rotation of the TX signal pattern. The capacitance sensing device also includes a processing block coupled with the TX generator.

Abstract: A method includes comparing a first battery life value of a first wireless device with a second battery life value of a second wireless device, and in response to determining, based on the comparing, that the first battery life value is less than the second battery life, adjusting a communication schedule so a duration of awake state operation of the first wireless device is less than a duration of awake state operation of the second wireless device.