| 摘要 |
<p>A current source (30) which provides multiple output currents having magnitudes which are of a predetermined ratio of the magnitude of an input current supplied to the current source. The current source includes an input transistor (14) and at least two output transistors (12, 16). The emitters and bases of the input and two output transistors are connected in common with the emitters thereof being connected to a terminal (18) at which is supplied a source of operating potential. The collectors are respectively coupled to individual utilization means. First and second additional transistors (32, 34) are provided having symmetrical structures with the bases thereof being connected to the bases of the output transistors and their emitters connected to the collector of the first output transistor (16). The collectors of the two output transistors are connected respectively to the collector of the input transistor and the collector of the second output transistor (12) whereby all of any saturation current produced by the first output transistor becoming saturated is equally conducted between the two additional transistors to maintain the ratio of input and output currents. </p> |
