Circuit arrangement for controlling piezoelectric actuator of e.g. pressure regulating valve, of gas engine of motor vehicle, has switch arranged between output terminals, and controller providing control signals for controlling switches

摘要

The arrangement (10) has a capacitor (C) arranged between circuit nodes (K1, K2), and an inductor (L1) arranged between a supply terminal (E2) and the node (K1). A controllable switch (Q1) i.e. FET, is arranged between the node (K1) and another supply terminal (E1), and another inductor (L2) is arranged between the node (K2) and the terminal (E1). A diode (D1) is arranged between the node (K2) and an output terminal (A2), and another controllable switch (Q3) i.e. FET, is arranged between output terminals (A1, A2). A controller (ST) provides control signals (q1, q3) to control the switches.