Arrangement comprising an electrical pulse generating module

Abstract

An arrangement () is disclosed, comprising an electrical pulse generating module () configured to generate at least one electrical pulse, and a transformer () electrically connected to the electrical pulse generating module (). The electrical pulse generating module () comprises an electrical energy storage module () that can be charged or discharged, and a switch unit () controllably switchable between at least a conducting state and a non-conducting state. When the switch unit () is switched into the non-conducting state, a power supply () charges the electrical energy storage module () by way of a charging current. When the switch unit () is switched into the conducting state, the electrical energy storage module () is discharged to create an electrical pulse to be received by the transformer (). The electrical pulse generating module () comprises a flyback protection unit () configured to protect the switch unit () against flyback upon the switch unit () being switched into the non-conducting state. The flyback protection unit () forms a current path () that bypasses the transformer (), and is configured such that a relation between the voltage drop across the flyback protection unit () for the charging current and the voltage drop across the transformer () for the charging current is such so as to cause the charging current to be directed via the transformer () at least to some extent.