A control circuit for an operating device for lighting means, wherein the control circuit has: - an output for the outputting of a control signal for the lighting means operation for clocking of switches of a half-bridge circuit; and - an input for a signal; characterized in that the control circuit furthermore has: - at least two parallel evaluation branches, with which the input is connected, wherein each of the at least two evaluation branches in each case has a comparator (K1, K2), wherein each comparator (K1, K2) is designed for supplying a reference voltage (Vref1/Vref2) and a signal applied to the input, wherein the reference voltages (Vref1, Vref2), which are supplied to the comparators (K1, K2) are different and the signal, which is applied to the input and is supplied to the comparators (K1, K2) is the same signal and furthermore either reflects a half-bridge current or the current through the lighting means; - a control module; and - a logic member, which is designed to combine outputs of the at least two evaluation branches with a logic member; wherein: - the at least two parallel evaluation branches are designed to supply their outputs to the control module as an actual value signal; - the control module is designed, to determine a control value by means of the actual value signal and a target value and to output it as a control signal to the output of the control circuit, wherein the control signal can be changed depending on the logical output value of the logic member; - a first evaluation branch of the at least two parallel evaluation branches is designed in such a manner that, if the signal, which is applied to the input, reflects (V1 (t)) the half-bridge current, the output of the first evaluation branch is designed to assume two different logical states, and that, if the signal, which is applied to the input reflects (V2(t)) the current though the lighting means, the output of the first evaluation branch is designed to assume only a constant logical value; and - a second evaluation branch of the at least two parallel evaluation branches is designed in such a manner that, if the signal (V2(t)), which is applied to the input, reflects (V2 (t)) the current through the lighting means, the output of the second evaluation branch is designed to assume two different logical states, and, if the signal (V1(t)), which is applied to the input, reflects (V1(t)) the half-bridge current, the output of the second evaluation branch is designed to assume only a constant logical value. - an output for the outputting of a control signal for the lighting means operation for clocking of switches of a half-bridge circuit; and - an input for a signal; - at least two parallel evaluation branches, with which the input is connected, wherein each of the at least two evaluation branches in each case has a comparator (K1, K2), wherein each comparator (K1, K2) is designed for supplying a reference voltage (Vref1/Vref2) and a signal applied to the input, wherein the reference voltages (Vref1, Vref2), which are supplied to the comparators (K1, K2) are different and the signal, which is applied to the input and is supplied to the comparators (K1, K2) is the same signal and furthermore either reflects a half-bridge current or the current through the lighting means; - a control module; and - a logic member, which is designed to combine outputs of the at least two evaluation branches with a logic member; - the at least two parallel evaluation branches are designed to supply their outputs to the control module as an actual value signal; - the control module is designed, to determine a control value by means of the actual value signal and a target value and to output it as a control signal to the output of the control circuit, wherein the control signal can be changed depending on the logical output value of the logic member; - a first evaluation branch of the at least two parallel evaluation branches is designed in such a manner that, if the signal, which is applied to the input, reflects (V1 (t)) the half-bridge current, the output of the first evaluation branch is designed to assume two different logical states, and that, if the signal, which is applied to the input reflects (V2(t)) the current though the lighting means, the output of the first evaluation branch is designed to assume only a constant logical value; and - a second evaluation branch of the at least two parallel evaluation branches is designed in such a manner that, if the signal (V2(t)), which is applied to the input, reflects (V2 (t)) the current through the lighting means, the output of the second evaluation branch is designed to assume two different logical states, and, if the signal (V1(t)), which is applied to the input, reflects (V1(t)) the half-bridge current, the output of the second evaluation branch is designed to assume only a constant logical value.