Patent ID: 7498857

Claim:
A circuit arrangement for generating a square wave signal (UN 2 ) having a DC voltage source for generating a DC voltage (UG); a driver stage (TS) arranged for alternately coupling a control node (SK) to a reference potential (GND) or the DC voltage (UG); a diode (D 1 ) and a first capacitor (C 1 ) coupled in series between a first pole (P 1 ) of the DC voltage source and the control node (SK); and an output stage (AS) with a first controllable switching means (TR 1 ) and a second controllable switching means (TR 2 ) wired in such a way that in operation of the output stage (AS) they are alternately conductive, wherein the switching means (TR 1 , TR 2 ) being coupled in series between a connecting node (N 1 ), formed between the diode (D 1 ) and the first capacitor (C 1 ), and the control node (SK), and wherein a connecting node (N 2 ), formed between the first switching means (TR 1 ) and the second switching means (TR 2 ), forms an output terminal for emitting the square wave signal.