Common mode control for low duty cycle

A differential amplifier circuit, comprising:

• a pulse wide modulation, PWM, modulator configured to receive a digital input signal to generate a PWM signal;
• a differential-mode current digital to analog converter, DM-IDAC configured to receive the PWM signal from the PWM modulator and provided a first and second differential mode current IDMP and IDMN;
• a common-mode current digital-to-analog converter, CM-IDAC configured to receive the PWM signal from the PWM modulator and provide a common mode current, ICM;
• a first and a second loop integrator;
• and
• a first and a second comparator,
• wherein each of the first and second loop integrators comprise:
• a virtual ground node terminal configured to receive the first and second differential mode current from the DM-IDAC, the common mode current from the CM-IDAC, and a feedback signal from an output stage of the differential amplifier circuit via a feedback loop;
• and
• an integrator output terminal configured to provide a loop integrator output signal, which is proportional to an integral of the signals received at the virtual ground node terminal;
• wherein each of the first and second comparators comprise:
• a comparator non-inverting input terminal configured to receive the loop integrator output signal;
• a comparator inverting input terminal configured to receive a triangular reference signal;
• and
• a comparator output terminal configured to provide a drive signal suitable for driving the output stage of the differential amplifier circuit.