1. A circuit arrangement, comprising: a first bipolar transistor; a second bipolar transistor; wherein the circuit arrangement is configured to provide a first current flowing through the first bipolar transistor and a second current flowing through the second bipolar transistor; a resistor electrically coupled between a first input of the first bipolar transistor and a first input of the second bipolar transistor; a first circuit configured to provide a first current flowing through the resistor to a first input node of the first bipolar transistor, a second circuit configured to provide a reference current to the first input node of the first bipolar transistor, wherein the first current and the reference current comprise different temperature dependencies.