Patent ID: 8222928
Filing Date: 2012-07-17
Classification: H03K

Abstract:
1. A circuit arrangement comprising: first and second input voltage terminals for applying an input voltage; at least one first semiconductor switching element having a drive terminal and a load path, the load path being connected between the input voltage terminals; a drive circuit having supply terminals for receiving a supply voltage, and having a drive output connected to the drive terminal of the at least one semiconductor switching element; a free-running oscillator having supply terminals, and an oscillator output, the oscillator being connected between the first and second input voltage terminals by using its supply terminals, the oscillator being designed to generate an oscillating output voltage at the oscillator output; a voltage supply circuit having input terminals for receiving the oscillating output voltage or a voltage dependent on the oscillating output voltage, and having output terminals for providing the supply voltage of the drive circuit; and at least one series circuit comprising a rectifier element and a capacitive storage element, said at least one series circuit being connected between the input terminals of the voltage supply circuit.