Patent ID: 8446208

Claim:
A circuit arrangement comprising: at least one analog switch operated with a supply voltage and comprising a switching signal contact and a pair of switch contacts, wherein the switching signal contact is configured to receive an electrical switching signal depending on which an electrical connection is switched between the switch contacts, and wherein the switch contacts have an internal on-resistance that is temperature dependent; at least one additional similar reference analog switch in the vicinity of the at least one analog switch and operated with the same common supply voltage, wherein the switch contacts thereof are connectable continuously via the internal temperature-dependent on-resistance thereof; and at least one comparison circuit configured to compare the internal on-resistance of the at least one reference analog switch with at least one external reference resistance or another setpoint setting of the reference analog switch(es), and to generate at least one control signal to keep the internal on-resistance of the at least one reference analog switch constant by changing the common supply voltage of all analog switches depending on the control signal.