Patent ID: 8686701

Claim:
An active wire compensation circuit, for compensating a level of an output voltage detecting signal, which is received by a feedback controller for controlling a converting circuit so as to have a load voltage received by a load being stabilized at a predetermined voltage level, wherein the converting circuit transforms an input voltage into an output voltage, and the output voltage is supplied to the load through a wire to generate the load voltage, the active wire compensation circuit comprising: a compensating unit, utilized for detecting a load current and generating a compensating current accordingly, wherein the compensating unit has a current source for generating the compensating current according to the load current; and a feedback compensating unit, modulating the level of the output voltage detecting signal according to the compensating current and outputting the compensated output voltage detecting signal accordingly, wherein the feedback compensating unit has an amplifier and a compensating resistor, the amplifier has a non-inverted input receiving the output voltage detecting signal and an inverted input receiving the compensating current, and the compensating resistor is coupled between an output of the amplifier and the inverted input to have the amplifier output the compensated output voltage detecting signal; wherein the output voltage detecting signal is generated directly from the output voltage.