Adaptiver Signaldetektor

Reception of pulses having large pulse width, varying in amplitude and closely following one another or telescoped into one another. For the purpose of evaluation, the leading edge is used and the trailing edge is suppressed if there is not a second signal in its vicinity, the signal amplitude is subdivided, the original signal is delayed and both signal amplitudes are compared in a constant fraction discriminator, the triggering threshold of a differential discriminator is regulated and a regulating device acts on the outputs of the two discriminators. If the sensor of a receiving system has a smaller band width than the receiving system itself, the above signal detector has to be duplicated. If, on the other hand, the input signal level reaches the triggering threshold of the further signal detector, the output signal of the first signal detector has to be separated from the final output and the triggering threshold of the first signal detector has to be increased by a specified value; the input signals are detected with the triggering threshold of the second signal detector for the time of application. If the input signal level falls below the triggering threshold, the output signal of the first signal detector is connected through to the final output and its increased triggering threshold is reduced to the original.