| 摘要 |
A current mirror circuit has first and second transistors (1, 2) which have their emitters in common and constitute a differential amplification circuit, third and fourth transistors (3,4) which have their bases in common and an input current source (Iin). Emitters of said first and second transistors (1, 2) are connected to a constant current source (Io), a collector of the second transistor (2) is connected to bases of the third and fourth transistors (3,4), and a collector on the third transistor (3) is connected to a base of the first transistor (1). A base of the second transistor (2) is connected to a bias node (VB1), emitters of the third and fourth transistors (3, 4) are connected to a reference power source (Vcc), and a collector of the fourth transistor (4) is connected to an output node (Iout). A collector of the first transistor (1) is connected to the reference power source (Vcc) through a load resistance (RL). A capacitor (CI) connects the base and the collector of the first transistor (1). |
