The circuit configuration converts an input signal into a binary output signal. The circuit has at least one comparator, at least one demodulation unit, and at least one clock unit. The demodulation unit has two or more capacitors and two or more switches controlled by the clock unit. The switches connect the capacitors of the demodulation unit to the comparator, and the comparator compares an input signal demodulated by the demodulation unit with a reference value and forms from that the binary output signal.