Patent ID: 7842925

Claim:
A radiation source for an optical sensor arrangement comprising: an incandescent lamp ( 101 ), a semiconductor switch (V 1 ) switching a connection of the incandescent lamp ( 101 ) to a supply voltage (V s ), said switch having a first terminal which is connected to the incandescent lamp ( 101 ), and a second terminal which is connected to a reference potential, wherein in the switched-on state of the semiconductor switch (V 1 ) a current path is formed between the first and second terminals, and wherein the semiconductor switch (V 1 ) has a control terminal to apply a control signal (V CONTROL ), a capacitor (C 2 ) connected between the control terminal and the first terminal, a first resistor (R 1 ), connecting the control terminal to the control signal and a second resistor (R 2 ) or capacitor connecting the control terminal to the reference potential.