| 摘要 |
A circuit includes a supply voltage and a control current line including two resistors. A sink current line branches off from the control current line between the resistors. A current sink transistor has an emitter that is connected to the sink current line and a collector that is connected to ground via a first further resistor. At least one reference transistor has an emitter that is connected to its base, to the supply voltage via a second further resistor and to the base of the current sink transistor. The collector of the reference transistor is connected to ground or to an emitter of a further reference transistor, which is switched in a manner similar to the first reference transistor.
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