| 摘要 |
A current mirror circuit comprises a current input terminal (1); a first field effect transistor (A11) and a second field effect transistor (A12), each having a gate terminal, a drain terminal, and a source terminal, the gate terminal of the first field effect transistor (A11) being connected to the gate terminal of the second field effect transistor (A12); a third field effect transistor (A21) having a source terminal connected to the drain terminal of the first field effect transistor (A11), and a drain terminal and a gate terminal connected to each other and to the current input terminal (1); and a fourth field effect transistor (A22) having a source terminal connected to the drain terminal of the second field effect transistor (A12), a gate terminal connected to the gate terminal of the third field effect transistor (A21), and a drain terminal serving as a current output terminal (2). Therefore, even when the output terminal voltage varies, since the current is almost constant, the circuit is not adversely affected by the variation in the output voltage. As a result, an error in the output current in response to the output voltage is significantly reduced. <IMAGE> |
