An electronic system , comprising: a power source ; a load coupled to the power source ; an analog-to-digital converter , coupled to the power source and the load , that samples a fluctuating voltage supplied by the power source and generates a digital representation of said fluctuating voltage ; characterized in comprising: a control logic , coupled to the analog-to-digital converter , that generates an amplitude correction signal based on said digital representation of the fluctuating voltage and on a target voltage , wherein the target voltage is a nominal voltage of the power source ; a correction logic , coupled to the control logic , that uses the amplitude correction signal and an audio signal to generate a switch control signal ; an output driver , coupled to the correction logic , that controls coupling between the power source and the load based on the switch control signal ; a variable current load that causes said fluctuating voltage to fluctuate; and a voltage regulator , coupled between the power source and the load , to provide the load with a regulated voltage that is less than voltages between which the fluctuating voltage fluctuates; wherein the voltage regulator is disabled when said variable current load in the system is disabled, and wherein the voltage regulator is enabled when said variable current load is enabled. a power source ; a load coupled to the power source ; an analog-to-digital converter , coupled to the power source and the load , that samples a fluctuating voltage supplied by the power source and generates a digital representation of said fluctuating voltage ; characterized in comprising: a control logic , coupled to the analog-to-digital converter , that generates an amplitude correction signal based on said digital representation of the fluctuating voltage and on a target voltage , wherein the target voltage is a nominal voltage of the power source ; a correction logic , coupled to the control logic , that uses the amplitude correction signal and an audio signal to generate a switch control signal ; an output driver , coupled to the correction logic , that controls coupling between the power source and the load based on the switch control signal ; a control logic , coupled to the analog-to-digital converter , that generates an amplitude correction signal based on said digital representation of the fluctuating voltage and on a target voltage , wherein the target voltage is a nominal voltage of the power source ; a correction logic , coupled to the control logic , that uses the amplitude correction signal and an audio signal to generate a switch control signal ; an output driver , coupled to the correction logic , that controls coupling between the power source and the load based on the switch control signal ; a variable current load that causes said fluctuating voltage to fluctuate; and a voltage regulator , coupled between the power source and the load , to provide the load with a regulated voltage that is less than voltages between which the fluctuating voltage fluctuates; wherein the voltage regulator is disabled when said variable current load in the system is disabled, and wherein the voltage regulator is enabled when said variable current load is enabled. <EOS>