Alternating current (AC) voltage regulator and method of operating the same

An alternating-current (AC) voltage regulator comprising:

• an input configured to receive an input voltage;
• an AC/DC pulse-width modulated (PWM) power supply configured to receive the input voltage and output a direct-current (DC) signal isolated from the input voltage;
• a control circuit configured to receive a portion of the input voltage, adjust an amplitude and a phase of the portion of the input voltage, and output the adjusted voltage;
• an amplifier including a first input, a second input, a power input, and an amplifier output, the amplifier configured to
• receive, via the power input, the isolated DC signal,
• receive, via the first input, the adjusted voltage,
• receive a feedback loop from the amplifier output to the second input, and
• output, via the amplifier output, a differential signal;
• and
• an output configured to add the differential signal to the input voltage resulting in a regulated voltage, and output the regulated voltage;
• wherein the amplifier output is electrically isolated, via an isolator, from the second input.