Wide-band low noise amplifier using current mirror

A wide-band low-noise amplifier using a current mirror is provided to perform a positive current feedback operation by using the current mirror. First and second common gate amplifiers(500,510) convert input signals of first and second input terminals to current. First and second common source amplifiers(520,530) amplify output signals of the first and second common gate amplifiers and output the amplified output signals to first and second output terminals. First and second current mirrors(540,550) supply the current to the first and second common source amplifiers according to the current applied to the first and second common gate amplifiers and feeds back the forward current to the second and first input terminals.