Patent ID: 9293995
Filing Date: 2016-03-22
CPC Classification: H02M,H05B,Y02B

Claim Text:
1. A power circuit, comprising: a voltage feedback module configured to continually generate a first feedback signal by dividing a voltage of electric energy delivered for driving a load; a current feedback module configured to generate a second feedback signal based on a current of the delivered electric energy, the current feedback module including a resistor and a filter coupled to the resistor, the filter configured to reduce high frequency components of the second feedback signal; a combining unit configured to combine the first feedback signal and the second feedback signal, and to generate a feedback signal; a controller configured to receive the feedback signal from the combining unit and to control a converter to receive and deliver the electric energy based on the feedback signal; and a scaling module configured to scale a voltage drop on the resistor, the scaling module including an operational amplifier and two resistors coupled together, the operational amplifier having two inputs and one output, one of the two inputs being coupled with the filter, another of the two inputs being coupled with the two resistors, the one output being coupled with one of the two resistors, and a ratio of the scale being determined by a ratio of the two resistors.