Apparatus and method of suppressing transient noise during transition for class-D amplifier system having one or more pulse width modulator output paths

A method of suppressing transient noise during transition of a class-D amplifier system having one or more pulse width modulation (PWM) output paths at least one of which comprising one or more digital closed-loop PWM modulators (DCL-PWMM), wherein at least one of the DCL_PWMM includes a digital integrator that provides an output value and receives a feedback value, the output value having an output resolution and the feedback value having a feedback resolution, the output resolution being finer than the feedback resolution, wherein the output value is the sum of an integer multiple of the feedback resolution and a residue, the method comprising:

• for at least one of the one or more DCL-PWMM:
• decreasing/increasing the residue of the digital integrator toward an integer multiple of the feedback resolution over a plurality of clock cycles in response to a request to transition the class-D amplifier;
• and
• forcing an output of the DCL_PWMM to have an approximate 50% duty cycle after decreasing/increasing the residue over the plurality of clock cycles.