Current mirror circuit, driving circuit using the same, and method of driving the circuit

A current mirror circuit, comprising:

• a first transistor;
• a second transistor, wherein the first transistor and the second transistor are connected to form a current mirror circuit;
• and
• a compensator coupled with the current mirror circuit to compensate for a threshold voltage of the first transistor and for a threshold voltage of the second transistor.

A driving circuit, comprising:

• a bias unit to supply bias current;
• and
• a driver coupled with the bias unit and driven when the bias current is supplied,
• wherein the bias unit comprises:
• a first transistor having a first terminal electrically connected to a voltage source and having a gate terminal electrically connected to the first terminal;
• 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 for compensating for a threshold voltage of the first transistors and a threshold voltage of the second transistor, wherein the compensator is coupled with each of the first transistor and the second transistor.

A method of driving a current mirror circuit, the method comprising the steps of:

• compensating for a threshold voltage of each of a first transistor and a second transistor that are electrically connected in the form of a current mirror circuit;
• supplying a first current via the first transistor through which electric current flows so that the first transistor serves as a diode;
• and
• supplying a second current via the second transistor such that a value of the second current equals, or approximately equals, a value of the first current.