Current mirror circuit

The invention discloses a current mirror circuit used for generating an output current flowing through an output current path according to an input current flowing through an input current path. The current mirror circuit at least comprises a P-type transistor, an operational amplifier, a basic circuit. The P-type transistor is located on an output current path; the amplifier is provided with a negative input end coupled with a first node, so as to receive the input current; the amplifier is also provided with a positive input end coupled with a drain electrode of the P-type transistor, and an output end coupled with a grid electrode of the P-type transistor; the basic circuit at least comprises a first transistor located on the input current path and a second transistor located on the output current path; a grid electrode of the first transistor is coupled with a drain electrode; and a grid electrode of the second transistor is coupled with the grid electrode of the first transistor.