Patent ID: 8018211

Claim:
An output voltage detecting circuit comprising: a conducting structure comprising a power output return terminal, a first contact and a second contact, wherein a compensating voltage is generated between said first contact and said second contact when an output current flows through said first contact and said second contact; a voltage regulator having a ground terminal connected to said first contact of said conducting structure for adjusting a first current according to a voltage across a first circuit terminal and said ground terminal of said voltage regulator, and generating a detecting signal according to said first current; a first resistor connected to said second contact of said conducting structure and said first circuit terminal of said voltage regulator; and a second resistor connected to said first circuit terminal of said voltage regulator and a positive power output terminal, wherein an output voltage across said positive power output terminal and said power output return terminal is subject to voltage division by said first resistor and said second resistor to generate a divided voltage, and said voltage across said first circuit terminal and said ground terminal of said voltage regulator is equal to a difference between said divided voltage and said compensating voltage.