| 摘要 |
A current generator which includes a first bipolar transistor, the base of which is connected to a reference voltage and the emitter to ground through a first resistor. A first current mirror is connected to mirror the emitter current of this first transistor. The mirrored current is augmented by the base current of a second transistor (matched to the first transistor), and by current Vbe/R passed by a second resistor (matched to the first transistor), which is connected between the base and emitter of the second transistor. The current thus augmented drives a second current mirror. The output of the second mirror provides a precise reference current, determined by the reference voltage and the resistor magnitude.
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