Patent ID: 9571003
Date: 2017-02-14
CPC Classifications: H02M

Claim:
1. A method comprising: (a) receiving an alternating current (AC) supply voltage onto a rectifier and outputting a rectified voltage signal V (b) storing energy in a first capacitor so that the first capacitor is charged to a direct current (DC) voltage, wherein the first capacitor is coupled between an output voltage node V (c) in a steady state operation mode of a non-isolated AC-to-DC power supply circuit: 1) decoupling the V (d) removing charge from a gate of the dep-FET when the dep-FET is being turned off in the steady state operation mode such that a substantial amount of the charge from the gate is transferred into and is stored in a second capacitor; and (e) moving charge from the second capacitor and back onto the gate of the dep-FET when the dep-FET is being turned on in the steady state operation mode.