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.