Abstract: A switching converter system comprising a first converter phase and a second converter phase, the switching converter system being operable in: a power conversion mode in which the first and second converter phases are operative to generate a multi-phase output voltage at an output of the switching converter circuit; and a calibration mode in which the first converter phase is operative as a reference supply for the second converter phase to cause a flow of current between the first and second converter phases to enable detection of a characteristic of each of the first and second converter phases.

Abstract: A power converter system, comprising: a main device; one or more secondary devices, each comprising: one or more switching converters; and a signal generator configured to generate a modulated signal for controlling the one or more switching converters, wherein a period of the modulated signal is pseudo-randomly adjusted within a predetermined period range; and a data bus comprising a data line for data transmission between the main device and the plurality of secondary devices, and a clock line for transmitting an interface clock signal; wherein the main device is configured to transmit a synchronization frame to the plurality of secondary devices; wherein each of the one or more secondary devices is configured to time align generation of the modulated signal in dependence on the synchronization frame.

Abstract: A switching converter system comprising a first converter phase and a second converter phase, the switching converter system being operable in: a power conversion mode in which the first and second converter phases are operative to generate a multi-phase output voltage at an output of the switching converter circuit; and a calibration mode in which the first converter phase is operative as a reference supply for the second converter phase to cause a flow of current between the first and second converter phases to enable detection of a characteristic of each of the first and second converter phases.

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: This application relates to methods and apparatus for driving a transducer with switching drivers. A switching driver has first and second supply node for receiving supply voltages and includes an output bridge stage, a capacitor and a network of switches. The network of switches is operable in different switch states to provide different switching voltages to the output bridge stage. A controller is configured to control the switch state of the network of switches and a duty cycle of output switches of the output bridge stage based on an input signal to generate an output signal for driving the transducer.

Abstract: This application relates to methods and apparatus for driving a transducer with switching drivers. A switching driver has first and second supply node for receiving supply voltages and includes an output bridge stage, a capacitor and a network of switches. The network of switches is operable in different switch states to provide different switching voltages to the output bridge stage. A controller is configured to control the switch state of the network of switches and a duty cycle of output switches of the output bridge stage based on an input signal to generate an output signal for driving the transducer.

Abstract: A device comprising: a data interface comprising: a data input for receiving a data signal; a clock input for receiving a clock signal for clocking the data signal; and a timing input for receiving a first timing signal having a first frequency; and a timing signal generator configured to generate, based on the first timing signal and the data signal, a second timing signal having a second frequency, the first frequency being a integer multiple of the second frequency, a phase of the second timing signal being aligned with an event in the data signal.

Abstract: This application describes an amplifier circuit (200) with a forward signal path with a class-D output stage (102) for generating a driving signal (Sout) based on a digital input signal (Sin). The amplifier has a first feedback path for providing a first digital feedback signal (Sfb1) based on the driving signal and a second feedback path for providing a second digital feedback signal (Sfb2) from a digital part of the forward signal path. The digital input signal (Sin) is combined with a selected feedback signal (Sfbs). The amplifier circuit is selectively operable in a first mode, in which the first feedback signal is used as the selected feedback signal, and in a second mode, in which the second feedback signal is used as the selected feedback signal. A calibration module (204) is operable to calibrate the first feedback path to reduce any DC offset when the amplifier circuit is operating in the second mode.