Common wire full-wave rectifier circuit

A system comprising:

• a rectifier having a rectifier input and a rectifier output, wherein the rectifier input is configured to receive an alternating current (AC) input voltage, the rectifier comprising:
• a first capacitor;
• a first current control device configured to provide an input current to the first capacitor during a positive cycle of the AC input voltage;
• a second capacitor having first and second capacitor terminals, wherein the second capacitor is configured to store a charge;
• a switch coupled between the first capacitor terminal and a ground terminal, wherein closing the switch discharges the charge stored the second capacitor, providing a capacitor current, during the positive cycle of the input voltage;
• a second current control device configured to provide the capacitor current to the first capacitor during the positive cycle of the input voltage, and the first capacitor is configured to store a charge responsive to the input current and the capacitor current;
• and
• a power converter having a converter input and a converter output, wherein the converter input is coupled the rectifier output, and the power converter is configured to provide a regulated output voltage at the converter output responsive a direct current (DC) output voltage at the rectifier output.

A circuit comprising:

• a first current control device having a first current control input and a first current control output;
• a second current control device having a second current control input and a second current control output, wherein the second current control input is coupled to the first current control output;
• a third current control device having a third current control input and a third current control output, wherein the third current control output is coupled to the second current control output;
• a fourth current control device having a fourth current control input and a fourth current control output, wherein the fourth current control output is coupled to the third current control input, and the fourth current control input is coupled to a common terminal;
• a first capacitor having first and second capacitor terminals, wherein the first capacitor terminal is coupled to the second current control output, and the second capacitor terminal is coupled to the common terminal;
• a second capacitor having third and fourth capacitor terminals, wherein the third capacitor terminal is coupled to the first current control input, and the fourth capacitor terminal is coupled to third current control input and to the fourth current control input;
• and
• a switch coupled between the third capacitor terminal and the common terminal.