A current mirror circuit includes a first current mirror leg and a second current mirror leg. The first current mirror leg is configured with N stages of first transistors coupled in series and with their respective gates tied together. The second current mirror leg is configured with N stages of second transistors coupled in series and with their respective gates tied together. The first transistors and the second transistors are implemented within a transistor array, the first transistors and the second transistors are coupled between a first reference terminal and a second reference terminal, the first transistors and the second transistors at 1st to Kth stages adjacent to the first reference terminal are implemented at corner regions of the transistor array, N and K are positive integers and K