Patent ID: 8766614

Claim:
An apparatus for the impedance matching of an electric load to the source impedance of a generator wherein the apparatus has input connections for connecting to the generator and output connections for connecting to the load; wherein the apparatus has a converter, which connects the input connections to the output connections by means of which an input voltage, which is applied between the input connections, can be converted into an output voltage different from this input voltage between the output connections; wherein the converter has an energy storage means, a controllable switching device which is connected to said energy storage means and an actuation device for said switching device; wherein the switching device is designed and can be moved to a first and a second switching state in such a way that, in the first switching state, energy from the generator can be stored in the energy storage means and, in the second switching state, energy stored in the energy storage means can be output to the load; wherein the apparatus has a detector, which is connected to the input connections, for detecting a measurement signal for the impedance matching; wherein the actuation device has an activation input by means of which it can be moved to a first and a second operating state; wherein the actuation device is designed in such a way that the first switching state is avoided in the first operating state and a changeover is made between the switching states in the second operating state; and wherein the detector is connected with its measurement signal output to the activation input characterized by the fact that the energy storage device is connected to at least one of the output connections by way of an active diode; that the active diode has a controllable switching element and a comparator having a first comparator input connected to a first load connection of the switching element and a second comparator input connected to a second load connection of the switching element; and that the output of the comparator is connected to a control connection of the switching element and a control input of the switching device.