Patent ID: 8054118

Claim:
A system, comprising: path sections, each path section including a supply line into which a medium-frequency current of between 1 and 100 kHz is injectable by a respective infeed assigned to the particular path section, wherein each infeed includes a control circuit, a first one of the control circuits arranged as a master and configured to transmit a clock signal for synchronization of additional infeeds arranged as a slave, wherein each infeed includes a medium-frequency voltage source operable in a pulse-width-modulated manner, as well as at least one of (a) a voltage-current converter and (b) a gyrator, an output voltage of the medium-frequency voltage source suppliable to the at least one of a voltage-current converter and a gyrator, an output current of the at least one of a voltage-current converter and a gyrator injectable into the supply line, wherein the current of the path sections is synchronized without detecting a current value.