Patent ID: 8581563

Claim:
A power supply device, comprising: a power supply unit configured for generating an electric potential provided to a load; and a feedback control unit electrically connected to the power supply unit; the feedback control unit detecting the electric potential and adjusting relevant parameters of the electrical potential to predetermined values; wherein the feedback control unit includes a first feedback circuit and a second feedback circuit electrically connected in series; wherein the first feedback circuit includes a first operational amplifier, an input end of the first operational amplifier electrically connected to the power supply unit via a first resistor and a first capacitor electrically connected in series, and further electrically connected to the power supply unit via a second resistor; an output end of the first operational amplifier electrically connected to the input end of the first operational amplifier via a third resistor and a second capacitor electrically connected in series; and further electrically connected to the input end of the first operational amplifier via a third capacitor; and wherein the second feedback circuit includes a second operational amplifier, an input end of the second operational amplifier electrically connected to the output end of the first operational amplifier via a fourth resistor and a fourth capacitor electrically connected in series, and further electrically connected to the output end of the first operational amplifier via a fifth resistor; an output end of the second operational amplifier electrically connected to the input end of the second operational amplifier via a sixth resistor and a fifth capacitor electrically connected in series, and further electrically connected to the input end of the second operational amplifier via a sixth capacitor.