Circuit for analyzing a reflected signal

A circuit arrangement for analyzing a clocked signal reflected from an object (3′, 3), particularly an optical signal (3a′;

• 3a), comprising at least one radiation emitter (1′, 1) which, for providing the clocked signal (1a′, 1a) is connected to a clocking signal generator (4′, 4), at least one radiation receiver (2′, 2) which receives radiation pulses (1a′, 1a) emitted by the radiation emitter (1′, 1) and reflected from the object (3′, 3), and a comparator (5′, 5) by means of which the output signal pulses (2a′, 2a) of the radiation receiver (2′, 2) are compared with reference pulses (6a′, 6a) wherein the amplitude of the reference signal pulses (6a′, 6a) depend on output signals (5a′, 5a) of the comparator (5′, 5), the reference signal pulses (6a′, 6a) occuring concurrently with the radiation impulses (3a′, 3a) received by the radiation receiver (2′, 2) and the impulses received by the radiation receiver being compensated for each by a respective internal reference impulse (6a′, 6a).