Abstract: In a circuit arrangement for providing a periodic saw-tooth current in a coil, e.g. a kinescope deflector coil, comprising a one-way conducting device that connects the coil to a voltage source, and a controllable switching device having a control electrode connectable to a periodic pilot-pulse source that makes the switching device conductive during part of the saw-tooth cycle, the switching device being connectable to a current source through an induction coil, the improvement wherein the latter is serially connected with the switching device, both being connected to the voltage source; and wherein a point common to the induction coil and to the switching device is connected through a capacitor to a transformer which latter is in turn connected to the one-way conducting device.