Class d amplifier and related chip and electronic apparatus

A class D amplifier, used to generate a differential output signal based on a differential input signal, wherein the differential input signal comprises a positive end input signal, a negative end input signal, and the differential output signal comprises a positive end output signal, a negative end output signal, and the class D amplifier comprises:

• a PWM modulator, comprising:
• a first comparator, configured to generate a first comparison result based on the positive end input signal and a triangular wave;
• a second comparator, configured to generate a second comparison result based on the negative end input signal and the triangular wave;
• an exclusive OR gate, configured to generate a first control signal based on the first comparison result and the second comparison result;
• a first AND gate, wherein a first input end of the first AND gate is configured to receive a first input based on the first comparison result of the first comparator, a second input end of the first AND gate is configured to receive a second input based on the first control signal, and the first And gate is configured to generate a positive end PWM output based on the first input and second input;
• and
• a second AND gate, wherein a first input end of the second AND gate is configured to receive a third input based on the second comparison result of the second comparator, a second input end of the second AND gate is configured to receive a fourth input based on the first control signal, and the second And gate is configured to generate a negative end PWM output based on the third input and fourth input;
• and
• an output stage, configured to generate the positive end output signal based on the positive end PWM output and the negative end output signal based on the negative end PWM output.