| 摘要 |
PROBLEM TO BE SOLVED: To provide a current mirror circuit for supplying plural bias currents or bias currents whose current ratio is large in an integrated circuit capable of reducing the occupancy area on arrangement, and reducing current consumption. SOLUTION: Inter-input/output NPN type bi-polar transistors constituting each current mirror circuit unit CM11, CM12, CM14, and CM18 are made the same so that the current mirror circuit units having the minimum number of constituting transistors can be serially connected across plural stage while output currents equal to inputted reference currents can be outputted. Thus, it is possible to allow the current input itself to have double current amplifying effects by adding the reference currents inputted to each stage to the output currents. Therefore, it is possible to constitute the current mirror circuit having the minimum number of constituting transistors capable of outputting binary weighted currents.
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