Abstract: A method for dynamic configuration of a register map in an embedded software system may include, in response to receipt of configuration parameters for the register map, generating at least one table of metadata descriptors associated with objects of the register map based on the configuration parameters and embodied in random access memory of the embedded software system, the metadata descriptors defining composition and order of registers of the register map and configured to interface with a register map interpreter in firmware stored in read-only memory of the embedded software system.

Abstract: A charging integrated circuit for use in an electronic device may include an input interface configured to receive input electrical energy from a power supply, wherein the input interface is controllable to modify characteristics of the input electrical energy to provide a supply voltage, an N-level power converter configured to receive the supply voltage based on the input electrical energy and generate an output voltage, and a controller configured to control characteristics of the input electrical energy to maximize power efficiency associated with at least one of the charging integrated circuit and the electronic device and control the input interface to adjust the supply voltage such that the output voltage of the power converter is substantially unequal to M times the supply voltage divided by (N?1), where M is a positive integer less than (N?1).

Abstract: The controller for a system including a power converter may be configured to cause the system to operate in one of a low-power mode and the high-power mode based on power demand from a load at the output of the power converter and when in the low-power mode, monitor the output of the power converter to detect an occurrence of a load transient from the load and in response to detecting the occurrence of the load transient, transition from the low-power mode to the high-power mode via a transition mode to minimize undershoot and overshoot of the output voltage.

Abstract: A power converter integrated circuit comprising: a switch network having coupling nodes for coupling the switch network to: a first capacitor; a second capacitor, a third capacitor; and an inductor, wherein the power converter integrated circuit is operable in a first forward mode as switched capacitor power converter circuitry and in a second forward mode as inductive converter circuitry, wherein: in the first forward mode, the switch network is operative to: couple the first and second capacitors in series in a first phase of operation; and couple the second capacitor and the third capacitor in parallel in a second phase of operation; and in the second forward mode, the switch network is operative to: couple the first and second capacitors in series and couple a series combination of the inductor and the third capacitor in parallel with the second capacitor in a phase of operation; and couple the first and second capacitors in parallel with the series combination of the inductor and the third capacitor in a

Abstract: This application relates to methods and apparatus for multichannel drivers for driving transducers in different channels. A multichannel driver has a plurality of output stages configured such that two output nodes can be modulated between selected switching voltages with a controlled duty cycle to generate a differential output signal across a respective transducer, each output stage being operable with different switching voltages in different modes of operation. A first set of two or more of the output stages are arranged to receive a voltage output by a capacitive voltage generator to use as a switching voltage. A controller is configured to control the mode of operation and duty-cycle of each of the output stages based on a respective input signal and also based on operation of the other output stages of the first set.

Abstract: This application relates to methods and apparatus for clipping prevention. A driver apparatus for driving a transducer has a switching driver configured to switch at least one output node between different switching voltages with a controlled duty-cycle to drive an output signal across the transducer. A clipping prevention controller is configured to control a gain applied to the input signal so as to provide limiting of the input signal to avoid clipping of the output signal. The clipping prevention controller is configured to dynamically control at least one limiting threshold used to determine when to apply limiting of the input signal based on an indication of load resistance of the transducer and the input voltage to the switching driver.

Abstract: This application relates to methods and apparatus for clipping prevention. A driver apparatus for driving a load with an output signal has a switching driver with a switch network and a modulator configured to control the switch network to switch output nodes between different switching voltages with a controlled duty-cycle. A quantizer controller receives a quantizer input signal based on an input signal and a feedback signal and controls the duty-cycle of the switch network. A clipping prevention controller is configured to control a gain applied to the input signal so as to provide limiting of the input signal to avoid clipping, wherein the clipping prevention controller is configured to dynamically control at least one limiting threshold used to determine when to apply limiting of the input signal based on an indication of said quantizer input signal.

Abstract: This application relates to methods and apparatus for driving a transducer connected between two output nodes in a bridge-tied-load configuration. A driver receives first and second supply voltages and has charge pumps that generate respective first and second boosted voltages. The driver is operable a first driver mode in which each output node is modulated between the first and second supply voltage; a second driver mode in which one output nodes is modulated between the first and second supply voltages and the other output node is modulated between either the first boosted voltage and the first supply voltage or between the second supply voltage and the second boosted voltage; and a third driver mode in which one of the output nodes is modulated between the first supply voltage and the first boosted voltage and the other output node is modulated between the second supply voltage and the second boosted voltage.

Abstract: Circuitry for processing an analyte signal obtained from an electrochemical cell, the circuitry comprising: measurement circuitry having a first measurement input coupled to a first electrode of the electrochemical cell, the measurement circuitry configured to convert the analyte signal at the first measurement input to a first analog output signal; an analog-to-digital converter (ADC) having an first ADC input for receiving the first analog output signal, the ADC configured to convert the first analog output signal to a first digital output signal at an ADC output; compensation circuitry configured in a measurement mode to: apply a first compensation to the first digital output signal to obtain a first compensated digital output signal, the first compensation to compensate for non-linearity in the ADC; and apply a second compensation to the first compensated digital output signal to obtain a second compensated digital output signal, the second compensation to compensate for non-linearity in the measurement c

Abstract: An integrated haptic system may include a digital signal processor and an amplifier communicatively coupled to the digital signal processor and integrated with the digital signal processor into the integrated haptic system. The digital signal processor may be configured to receive a force sensor signal indicative of a force applied to a force sensor and generate a haptic playback signal responsive to the force. The amplifier may be configured to amplify the haptic playback signal and drive a vibrational actuator communicatively coupled to the amplifier with the haptic playback signal as amplified by the amplifier.

Abstract: A power converter integrated circuit comprising a switch network having coupling nodes for coupling the switch network to a single flying capacitor, an output capacitor, and an inductor; wherein the power converter integrated circuit is operable in a first forward mode as switched capacitor power converter circuitry and in a second forward mode as inductive converter circuitry, wherein in the first forward mode, the switch network is operative to couple the single flying capacitor and the output capacitor in series in a first phase of operation, and couple the single flying capacitor and the output capacitor in parallel in a second phase of operation; and in the second forward mode, the switch network is operative to couple the single flying capacitor, the inductor and the output capacitor in series in a phase of operation, and couple a series combination of the single flying capacitor and the inductor in parallel with the output capacitor in a subsequent phase of operation.

Abstract: Circuitry for processing a response from an electrochemical cell to a stimulus, the circuitry comprising: sense circuitry configured to measure the response of the electrochemical cell to the stimulus; and processing circuitry configured to: sample the measured response to obtain a plurality of samples; and output the plurality of samples, wherein the processing circuitry is operable in: a continuous sampling mode in which the processing circuitry is configured to periodically sample the measured response at a fixed sampling rate; a discontinuous sampling mode in which the processing circuitry is configured to periodically sample the measured response during macro periods separated by macro intervals during which sampling of the measured response is disabled.

Abstract: Circuitry for processing an analyte signal obtained from an electrochemical cell, the circuitry comprising: a first signal path between a first electrode of the electrochemical cell and a first input of an analog-to-digital converter (ADC) circuit, the first signal path comprising a first gain stage configured to convert the analyte signal to a first analog signal; a second signal path between the first electrode and a second input of the ADC circuit, the second signal path comprising a second gain stage configured to convert the analyte signal to a second analog signal; and switching circuitry configured to selectively couple the first electrode to the first input of the ADC circuit.

Abstract: Circuitry for processing an output of an electrochemical cell comprising a first electrode and a second electrode, the circuitry comprising: drive circuitry configured to apply a stimulus to the first electrode; measurement circuitry configured to obtain an output signal from the output of the electrochemical cell in response to the stimulus; processing circuitry configured to: apply the stimulus to a model of the electrochemical cell; obtain a modelled output signal from the model in response to the stimulus; determine an error in the output signal based on the output signal and the modelled output signal.

Abstract: Amplifier circuitry comprising: output stage circuitry configured to modulate a power supply voltage, based on a drive signal received at an input of the output stage circuitry, to generate an amplifier output signal; a feedback path coupled to an output of the output stage circuitry and configured to generate a feedback signal based on the amplifier output signal; loop filter circuitry configured to receive an input signal based on the feedback signal and to output a digital loop filter output signal; divider circuitry configured to divide the digital loop filter output signal by the power supply voltage to generate a divided digital output signal; and encoder circuitry configured to generate the drive signal based on the divided digital output signal.

Abstract: Circuitry for processing an analyte signal obtained from an electrochemical cell, the circuitry comprising: measurement circuitry having a first input coupled to a first electrode of the electrochemical cell, the measurement circuitry configured to convert the analyte signal at the first electrode to a first analog output signal; a first analog-to-digital converter (ADC) having an first ADC input for receiving the first analog output signal, the first ADC configured to convert the first analog output signal to a first digital output signal at a first ADC output; drive circuitry; and control circuitry, wherein the circuitry is operable in one or more of a calibration mode and a measurement mode, wherein, in the calibration mode, the drive circuitry is configured to apply a calibration signal at the first input of the measurement circuitry, the control circuitry configured to calibrate the measurement circuitry based on the first analog output signal or the first digital output signal responsive to the calibrat

Abstract: A system for estimating power dissipation in an integrated circuit comprising a power converter and an amplifier, the system comprising processing circuitry configured to: receive a signal indicative of an output voltage to a load which, in use of the integrated circuit, is driven by the amplifier; receive a signal indicative of an output current to the load; determine an output power value based on the received signal indicative of the output voltage to the load and the received signal indicative of the output current to the load; receive a signal indicative of an input voltage to the power converter; receive a signal indicative of an average current input to the power converter; determine an input power value based on the received signal indicative of the input voltage to the power converter and the received signal indicative of the average current input to the power converter; and determine a power dissipation value based on the determined output power value and the determined input power value.

Abstract: A method of testing a battery of a portable electronic device, the method implemented by the portable electronic device or battery-testing apparatus thereof, the method comprising: applying a measurement signal to at least one terminal of the battery, wherein the measurement signal is a fluctuating or alternating electrical signal; and obtaining a measurement of a mechanical response of the battery to the measurement signal from a sensor.

Abstract: A digital-to-analog converter (DAC) may include an integrator, an input network, and control circuitry. The input network may include a plurality of parallel taps, each having a signal delay such that at least two of the signal delays of the members of the plurality of parallel taps are different, and wherein each member is coupled between an input of the digital-to-analog converter and an input of the integrator. The control circuitry may be configured to selectively enable and disable particular members of the plurality of parallel taps in order to program an effective input resistance of the input network to control an analog gain of the DAC, such that the control circuitry enables, substantially contemporaneously, an even number of members at a time in order to increase the analog gain, with half of such enabled members in a first group and half of such enabled members in a second group.

Abstract: An integrated circuit (IC) comprising: control circuitry operable to control: an external switch of a primary current path for an energy storage component of a circuit, wherein the external switch of the primary current path is external to the IC; a first internal switch of a secondary current path for the energy storage element, wherein the first internal switch is internal to the IC, wherein the IC is operable in: a first mode in which the first internal switch of the secondary current path is actuated to enable the secondary current path; and a second mode in which the external switch of the primary current path is actuated to enable the primary current path.