US Patent 10033296 Rectifier and regulator circuit

Systems and methods for rectifying and regulating an input voltage are disclosed. A biasing circuit is configured to generate a biasing voltage greater than the maximum value of the input voltage minus a forward bias voltage of a p-n junction diode and apply the biasing voltage to the body terminal of a MOSFET. The biasing circuit may generate the biasing voltage by rectifying the input voltage. A control circuit is configured to generate a gate voltage based on the rectified and regulated output voltage and apply the gate voltage to the gate terminal of the MOSFET.