Circuit arrangement for regulation of a parameter of an electrical signal, comprising: a circuit component which outputs an electrical digital output signal with an electrical parameter to be regulated at an output terminal of the circuit arrangement, wherein the output signal represents a differential digital input signal with a duty cycle and the parameter to be regulated is the duty cycle of the output signal, a regulating unit (8, 9) with a first integrator which is supplied with the output signal of the circuit component and which generates an output signal, a second integrator which is supplied with the output signal of the first integrator, wherein the second integrator comprises an operational amplifier with an inverting input (91E1), a non-inverting input (91E2) and an output, and the output is coupled back to the inverting (91E1) input via a feedback path, at the inverting input (91E1) the output signal of the first integrator is applied, at the non-inverting input (91E2) a reference signal representing a desired value is applied, in the feedback path the output of the operational amplifier is coupled back to the inverting input (91E1) via a capacity and a resistor connected in series, and the output of the operational amplifier provides an output signal of the regulating unit, wherein the output signal is supplied to the regulating unit (8, 9) of the circuit component as a control factor, characterized in that the first circuit component comprises a differential stage which generates a digital output signal, the duty cycle of which is regulated by the circuit arrangement, and wherein the differential stage comprises a first comparator (T1, T2) which is supplied with the differential input signals, a first current source for controlling the current through the first comparator, a second comparator (T5, T6) constructed complementary to the first comparator, which is supplied with the same differential input signals, a second current source for controlling the current through the second comparator, a unit (T4, T9, T7, T10) which generates from the currents of the both comparators a voltage signal fluctuating in its level, a regenerator unit (40, 50) which converts the fluctuating voltage signal to a digital output signal and supplies it to an output, and a control unit which in dependency on the output signal of the regulating unit (8, 9) generates two control signals, of which one is supplied to the first current source and one is supplied to the second current source. a circuit component which outputs an electrical digital output signal with an electrical parameter to be regulated at an output terminal of the circuit arrangement, wherein the output signal represents a differential digital input signal with a duty cycle and the parameter to be regulated is the duty cycle of the output signal, a regulating unit (8, 9) with a first integrator which is supplied with the output signal of the circuit component and which generates an output signal, a second integrator which is supplied with the output signal of the first integrator, wherein a first integrator which is supplied with the output signal of the circuit component and which generates an output signal, a second integrator which is supplied with the output signal of the first integrator, wherein the second integrator comprises an operational amplifier with an inverting input (91E1), a non-inverting input (91E2) and an output, and the output is coupled back to the inverting (91E1) input via a feedback path, at the inverting input (91E1) the output signal of the first integrator is applied, at the non-inverting input (91E2) a reference signal representing a desired value is applied, in the feedback path the output of the operational amplifier is coupled back to the inverting input (91E1) via a capacity and a resistor connected in series, and the output of the operational amplifier provides an output signal of the regulating unit, wherein the output signal is supplied to the regulating unit (8, 9) of the circuit component as a control factor, characterized in that the first circuit component comprises a differential stage which generates a digital output signal, the duty cycle of which is regulated by the circuit arrangement, and wherein the differential stage comprises a first comparator (T1, T2) which is supplied with the differential input signals, a first current source for controlling the current through the first comparator, a second comparator (T5, T6) constructed complementary to the first comparator, which is supplied with the same differential input signals, a second current source for controlling the current through the second comparator, a unit (T4, T9, T7, T10) which generates from the currents of the both comparators a voltage signal fluctuating in its level, a regenerator unit (40, 50) which converts the fluctuating voltage signal to a digital output signal and supplies it to an output, and a control unit which in dependency on the output signal of the regulating unit (8, 9) generates two control signals, of which one is supplied to the first current source and one is supplied to the second current source.