Abstract: An apparatus includes an amplifier having an input. An interface has inputs and an output. The interface is configured to: invert each bit of a value received at a first input of the interface to produce an inverted value; and provide the inverted value at the output. A processor has an input coupled the output of the interface, has first output coupled to a second input of the interface, and has a second output coupled to the input of the amplifier. The processor is configured to determine whether to set an adjustable gain setting of an audio processing block to the inverted value.

Abstract: Examples of amplifiers and associated control blocks control analog and digital gains of such an amplifier to maintain a ripple voltage at the input/virtual terminals of an internal integrator below an upper limit. Such an example amplifier comprises digital and analog processing blocks. The digital processing block receives a digital audio signal and also includes a digital gain component. The analog processing block includes an analog gain component and an output stage having a supply voltage terminal. A boost controller receives the digital audio signal, and has a digital output and a boost voltage output to output a boost voltage. A digital controller receives the digital audio signal, and has a first digital input coupled to the digital output of the boost controller and a second digital input to receive a measurement value indicative of the outputted boost voltage. Based on its inputs, the digital controller controls the digital and analog gain components.

Abstract: An apparatus includes an amplifier having an input. An interface has inputs and an output. The interface is configured to: invert each bit of a value received at a first input of the interface to produce an inverted value; and provide the inverted value at the output. A processor has an input coupled the output of the interface, has first output coupled to a second input of the interface, and has a second output coupled to the input of the amplifier. The processor is configured to determine whether to set an adjustable gain setting of an audio processing block to the inverted value.

Abstract: An example apparatus includes a register, a memory to store reconfiguration data associated with the register, and register control circuitry. The example register control circuitry is to determine whether the memory includes the reconfiguration data corresponding to a trigger event experienced by state machine circuitry. Additionally, the example register control circuitry is to, based on determining that the memory includes the reconfiguration data corresponding to the trigger event, reconfigure the register identified in the reconfiguration data with a value included in the reconfiguration data.

Abstract: Examples of amplifiers and associated control blocks control analog and digital gains of such an amplifier to maintain a ripple voltage at the input/virtual terminals of an internal integrator below an upper limit. Such an example amplifier comprises digital and analog processing blocks. The digital processing block receives a digital audio signal and also includes a digital gain component. The analog processing block includes an analog gain component and an output stage having a supply voltage terminal. A boost controller receives the digital audio signal, and has a digital output and a boost voltage output to output a boost voltage. A digital controller receives the digital audio signal, and has a first digital input coupled to the digital output of the boost controller and a second digital input to receive a measurement value indicative of the outputted boost voltage. Based on its inputs, the digital controller controls the digital and analog gain components.