Adaptive digital lc compensation filter for audio amplifiers

An audio amplifier, comprising a signal loop, the signal loop comprising

• an audio amplifier input, configured to receive a to be amplified signal, the audio amplifier input in connection with
• at least one compensator, configured to compensate a transmission of an audio output and of an ADC input, wherein the at least one compensator is in connection with
• at least one Pulse-Width-Modulator (PWM in connection with
• a power stage in connection with
• at least one LC filter and load, wherein the LC filter load is configured to be in connection with the audio output, and is in connection with
• at least one ADC, in connection with the at least one compensator, and
• characterized in
• at least one adaptive digital LC compensation filter configured to receive an input from the ADC and an input from the at least one Pulse-Width-Modulator, and to provide an output to the at least one compensator, and wherein the at least one adaptive digital LC compensation filter is configured to stabilize a performance of the loop.

A signal loop for an audio amplifier comprising an audio amplifier input configured to receive a to be amplified signal, the audio amplifier input in connection with

• at least one compensator, configured to compensate for a transmission of an audio output and of an ADC input, the at least one compensator in connection with
• at least one Pulse-Width-Modulator (PWM), the at least one pulse width modulator in connection with
• a power stage in connection with
• at least one LC filter and load, wherein the LC load is configured to be in connection with the audio output, and the LC filter is in connection with
• at least one ADC, in connection with the at least one compensator, and
• at least one adaptive digital LC compensation filter configured to receive an input from the ADC and an input from the at least one Pulse-Width-Modulator, and to provide an output to the at least one compensator, and wherein the at least one adaptive digital LC compensation filter is configured to stabilize a performance of the loop.

An integrated circuit comprising wherein the signal loop comprises:

• an audio amplifier input, configured to receive a to be amplified signal, the audio amplifier input in connection with
• at least one compensator, configured to compensate a transmission of an audio output and of an ADC input, the at least one compensator in connection with
• at least one Pulse-Width-Modulator (PWM), in connection with
• a power stage, in connection with
• at least one LC filter and load, wherein the LC filter is configured to be in connection with the audio output, and is in connection with
• at least one ADC, in connection with the at least one compensator;
• and
• at least one adaptive digital LC compensation filter, configured to receive an input from the ADC and an input from the at least one Pulse-Width-Modulator, and to provide an output to the at least one compensator, and wherein the at least one adaptive digital LC compensation filter is configured to stabilize a performance of the loop.

An electronic device comprising an audio amplifier having a signal loop, wherein the signal loop comprises:

• an audio amplifier input configured to receive a to be amplified signal, the audio amplifier input in connection with
• at least one compensator, configured to compensate a transmission of an audio output and of an ADC input, the at least one compensator in connection with at least one Pulse-Width-Modulator (PWM), in connection with a power stage, in connection with
• at least one LC filter and load, wherein the LC filter is configured to be in connection with the audio output, and is in connection with at least one ADC, in connection with the at least one compensator;
• and
• at least one adaptive digital LC compensation filter, configured to receive an input from the ADC and an input from the at least one Pulse-Width-Modulator, and to provide an output to the at least one compensator, and wherein the at least one adaptive digital LC compensation filter is configured to stabilize a performance of the loop.