Abstract: A differential sensing system for sensing a current through a circuit element of a circuit, the differential sensing system comprising: a first current sense path having an input for coupling to a first node of the circuit element, the first current sense path comprising a first plurality of replica devices; a second current sense path having an input for coupling to a second node of the circuit element, the second current sense path comprising a second plurality of replica devices, wherein the second plurality is equal to the first plurality; a first cross-coupling switch operable to couple the input of the first current sense path to the second plurality of replica devices; a second cross-coupling switch operable to couple the input of the second current sense path to the first plurality of replica devices; differential amplifier circuitry having first and second inputs, wherein the differential amplifier circuitry is configured to output a differential replica current pair indicative of the current through

Abstract: A current sensing system for sensing current through first and second circuit elements of a circuit in which the first and second circuit elements are active in respective first and second phases of an operational cycle of the circuit, the current sensing system comprising: first current sensing circuitry for sensing a current through the first circuit element; second current sensing circuitry for sensing a current through the second circuit element; and summation circuitry coupled to an output of the first current sensing circuitry and an output of the second current sensing circuitry, wherein the summation circuitry is configured to output a summation signal indicative of a sum of the sensed current through the first circuit element and the sensed current through the second circuit element so as to provide an indication of a total current drawn over an operational cycle of the circuit.

Abstract: A method for diagnosing a condition of a first headset enclosed in a headset enclosure. The method comprises playing a first audio stimulus through a first speaker of the headset; detecting a first response signal derived by a first transducer; and determining a condition of the first speaker and/or first transducer based on the first response signal.

Abstract: A system for potassium measurement comprising: a chemical sensor configured to output a chemical sensor output signal indicative of a first estimate of a potassium level of a user of the system; a cardiac sensor configured to output a cardiac sensor output signal indicative of a second estimate of the potassium level of the user; and a controller configured to generate an output indicative of the potassium level of the user based on the first and second estimates.

Abstract: A glucose monitoring system comprising: a glucose sensor configured to output a glucose sensor output signal indicative of an estimate of a glucose level of a user of the glucose monitoring system; a movement sensor configured to output a movement sensor output signal indicative of detected movement of the user; and a controller configured to generate an estimate of a current glucose level of the user based on the glucose sensor output signal and the movement sensor output signal.

Abstract: A modulator integrated circuit (IC) package comprising: signal modulator circuitry; and power modulator circuitry, wherein the signal modulator circuitry is configured to receive an input signal and to supply a modulated output signal to output stage circuitry external to the modulator IC package, and wherein the power modulator circuitry is configured to control power converter circuitry, external to the modulator IC package, operative to provide a supply voltage to the output stage circuitry.

Abstract: Circuitry for determining one or more characteristics of an electrochemical cell comprising a first working electrode, a second working electrode and a counter electrode, the circuitry comprising: drive circuitry configured to: apply a first stimulus to the first working electrode; apply a compensation stimulus to one or more of the first working electrode, the second working electrode and the counter electrode; measurement circuitry configured to: measure a first signal at the first working electrode; and measure a second signal at the second working electrode; and processing circuitry configured to: determine the one or more characteristics of the electrochemical cell based on the first signal or the second signal, wherein the compensation stimulus is applied to compensate for cross talk between the first working electrode and the second working electrode.

Abstract: A semiconductor structure may include a substrate having a surface, an isolation structure formed on the surface, an active region formed on the surface adjacent to the isolation structure, a gate extended over the isolation structure and the active region, and a source region formed within the active region. The source region may include a first subregion formed adjacent to a first portion of the gate and the isolation structure, the first subregion having a first doping and a second subregion formed adjacent to a second portion of the gate, wherein the second subregion has a second doping different from the first doping.

Abstract: A system may include a signal processor that receives a first input signal from a first channel switching amplifier of a multi-channel amplifier and a second input signal from a second channel switching amplifier of the multi-channel amplifier, wherein the first channel switching amplifier and the second channel switching amplifier share a capacitor that has a first terminal coupled to a common terminal that is coupled to a first negative polarity of the first channel switching amplifier and a second positive polarity of the second channel switching amplifier and a second terminal that is coupled to a ground. The signal processor may be configured to receive the first input signal and the second input signal and modify the first input signal into the first channel switching amplifier and the second input signal into the second channel switching amplifier to regulate a common mode signal at the common terminal.

Abstract: A power management integrated circuit (PMIC) may have a loop controller configured to receive a first error signal from a first driver IC having a first driver powered from a supply voltage and configured to drive a first output signal responsive to a first input signal and a first error detector configured to generate the first error signal based between the supply voltage as detected locally to the first driver IC and a first reference voltage associated with the first driver, receive a second error signal from a second driver IC analogous to the first driver IC, and regulate the supply voltage based on the first and second error signals.

Abstract: A semiconductor structure may include a substrate, an active region formed on the substrate, a gate region extended over the active region along a first direction parallel to a surface of the substrate, and a source region formed within the active region and adjacent to the gate region in a second direction parallel to the surface and perpendicular to the first direction. The source region may comprise a first subregion and a second subregion such that the second subregion is between the first subregion and the gate region. The first subregion may comprise a first width along the first direction and the second subregion may comprise a second width along the first direction. The first width may be less than the second width.

Abstract: A system may include a first controller and a second controller communicatively coupled to the first controller via a bidirectional communication channel and configured to drive a load in accordance with a target current signal, sample a load voltage of the load at a sample rate substantially slower than a time duration of electrical transients of the load, calculate a resistance of the load based on a current signal and the load voltage and communicate information indicative of the resistance to the first controller at a time interval substantially slower than the time duration of electrical transients of the load, detect when one or more accuracy-reducing events associated with the system occur, wherein an accuracy-reducing event is one which negatively affects accuracy of calculation of the resistance, and modify the information provided to the first controller when one or more accuracy-reducing events occur.

Abstract: A solid state keyboard device comprising a user interaction layer for receiving a user input and a plurality of haptic actuators, wherein the solid state keyboard device is operable to cause one or more of the plurality of haptic actuators to generate a haptic output at the user interaction layer in response to a received user input, wherein one or more parameters of the haptic output are variable according to one or more parameters of or associated with the received user input.

Abstract: A switching transducer driver operable in: a first mode in which first and second output stage switches are controlled to generate a two-level output signal, wherein an impedance of the first output stage switch is substantially the same as an impedance of the second output stage switch; and a second mode in which the first and second output stage switches and a third switch are controlled to generate a three-level output signal, wherein an impedance of the third switch is substantially greater than the impedance of the first output stage switch and the second output stage switch.

Abstract: Circuitry for detecting application of an electrochemical sensor to a subject, the electrochemical sensor comprising an ion-selective electrode and a first potentiostatic electrode, the circuitry comprising: measurement circuitry configured to: measure a ion-selective signal at the ion-selective electrode; measure a potentiostatic signal at the first potentiostatic electrode; processing circuitry configured to: detect application of the electrochemical sensor to the subject based on the ion-selective signal and the potentiostatic signal.

Abstract: In accordance with embodiments of the present disclosure, a system may include a main integrated circuit (IC) comprising current measurement circuitry, an auxiliary current sense resistor coupled to the main IC, and an auxiliary pair of Kelvin sense resistors coupled between the auxiliary current sense resistor and the current measurement circuitry. The main IC may further comprise current injection circuitry configured to inject a known sink current which is split between a main current in a first path and an auxiliary current in a second path comprising the auxiliary current sense resistor.

Abstract: A system may include a plurality of processing cores including at least a first processing core and a second processing core, a shared memory communicatively coupled to and accessible by each of the plurality of processing cores, a global monitor communicatively coupled to each of the plurality of processing cores and configured to control exclusive accesses to memory by each of the plurality of processing cores, and a software architecture embodied in non-transitory computer-readable media and configured to, when read and executed by the multicore processor, partition a plurality of processing tasks between the first processing core and the second processing core.

Abstract: In an example there is provided a first integrated circuit. The first integrated circuit is configured to receive an audio signal and configured to drive an audio transducer based on the received audio signal. The first integrated circuit is configured to transmit a portion of the audio signal to a second integrated circuit.

Abstract: This application relates to methods and apparatus for voltage monitoring of switching drivers. A modulator is configured to receive a modulator input signal and to controlling switching of an output stage of the switching driver to generate a first drive signal. A voltage monitor is configured to receive a first digital signal tapped from the modulator and to generate an indication of output voltage of the first drive signal from the first digital signal by controllably applying an adjustment from the first digital signal to compensate for inaccuracy between the first digital signal and the output voltage. The adjustment is based on monitored operation of the modulator. In some cases the monitored operation may be clipping of the switching driver. In some cases the monitored operation may be a signal generated by the modulator that include a contribution from a feedback signal of output voltage.

Abstract: Current detection circuitry for generating an average inductor current signal indicative of an average inductor current during an operational cycle of power converter circuitry, the current detection circuitry comprising: circuitry for generating a peak inductor current signal indicative of a peak inductor current during the operational cycle; and circuitry for applying a ripple current estimate signal, indicative of an estimate of half of a ripple current in the power converter circuitry, to the peak inductor current signal to generate the average inductor current signal, wherein the ripple current is equal to a difference between the average inductor current and the peak inductor current.