| 摘要 |
<p>The current source includes a first transistor (1) and second transistor (2) with their bases connected together, a resistor (4) connected to the emitter of the first transistor (1), a third transistor (3) with its base connected to the collector of the second transistor (2), and an amplifying unit (6) having its input end connected to the collector of the third transistor (3) and a plurality of output portions with output resistors. The plurality of output portions of the amplifying unit (6) are connected to the collectors of the first transistor (1), second transistor (2) and third transistor (3), respectively. The base current of the third transistor (3) is set to make the collector currents of the first transistor (1) and second transistor (2) substantially equal. <IMAGE></p> |
