Patent ID: 7348831

Claim:
A current mirror circuit, comprising: a first transistor having a first terminal electrically connected to a voltage source and having a gate terminal and a second terminal that are electrically connected to each other; a second transistor having a first terminal electrically connected to the voltage source and having a gate terminal electrically connected to the gate terminal of the first transistor; and a compensator adapted to compensate for a threshold voltage of each of the first transistor and the second transistor, wherein the compensator is coupled with each of the first transistor and the second transistor, wherein the first transistor and the second transistor each serve as a diode when a first control signal is applied, and wherein the compensator comprises: a first capacitor and a second capacitor, each of which is electronically connected between the gate terminal of the first transistor and the gate terminal of the second transistor, wherein a common terminal of the first capacitor is connected to a common terminal of the second capacitor; a third transistor provided between the common terminals of the first and second capacitors and the voltage source and configured to be turned on when the first control signal is supplied; and a fourth transistor connected between the gate terminal and the second terminal of the second transistor and configured to be turned on when the first control signal is supplied.