Asynchronous Error Correction Circuit for Switching Amplifier

An integrated circuit, comprising:

• an asynchronous error correction circuit that comprises:
• a comparison circuit that is operative to provide a comparison signal in response to an error value and a reference value, wherein the error value is based on a pulse modulated input signal and a pulse modulated output signal;
• and
• a correction circuit that is operative to asynchronously provide a corrected pulse modulated signal by selectively delaying and advancing an edge of the pulse modulated input signal based on the comparison signal, wherein the pulse modulated output signal is based on the corrected pulse modulated signal.

An audio device, comprising:

• a conversion circuit that is operative to provide a pulse width modulated signal in response to a pulse code modulated signal;
• an error correction circuit that comprises:
• a comparison circuit that is operative to provide a comparison signal in response to an error value and a reference value, wherein the error value is based on the pulse width modulated signal and a pulse width modulated output signal;
• and
• a correction circuit that is operative to asynchronously provide a corrected pulse width modulated signal by selectively delaying and advancing an edge of the pulse width modulated signal based on the comparison signal, wherein the pulse width modulated output signal is based on the corrected pulse width modulated signal;
• and
• a switching amplifier circuit that is operative to provide the pulse width modulated output signal in response to the corrected pulse width modulated signal.