| 摘要 |
An electric circuit is constructed of a first current mirror circuit (14) and a second current mirror circuit (15). The first current mirror circuit has a first input transistor (Q1), a first coupling transistor (Q2) and an output transistor (Q3), while the second current mirror circuit has a second input transistor (Q4), a second coupling transistor (Q2) and the output transistor (Q5). First and second input terminals (20, 22) are respectively connected to the collectors of the first and second input transistors (Q1, Q4), and a common output terminal (23) is connected to the collector of the respective output transistor (Q3, Q5). First and second additional transistors (QP1, QP4) are respectively connected to the first and second input transistors, whereby an output current proportional to either greater value of two input currents supplied to the two input terminals (20, 21) is provided from the common output terminal (23). |
