| 摘要 |
A current mirror circuit includes four bipolar junction transistors. One transistor serves as an input device for conducting via its collector a majority of the reference current. Another transistor is connected as a compensation device, with its emitter connected to the base of the input device, its base connected to the collector of the input device for conducting a minority of the reference current, and its collector connected to conduct a portion of the output current. Two transistors are connected in cascode as output devices for conducting a portion of the output current. The first output device emitter and base are connected to the emitter and base, respectively, of the input device. The second output device emitter is connected to the collector of the first output device, while its base is connected to the collector of the input device for conducting another minority of the reference current and its collector is connected to the collector of the compensation device to conduct another portion of the output current.
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