Circuit arrangement for detecting at least one time-limited event

摘要

A circuit arrangement for detecting at least one time-limited event which leads to a temporary increase in a continuously present signal level exhibits a sensor (1) responding to the event followed by a signal analysing device. The latter contains, as analog stages, a rectifier (13) for the signal supplied by the sensor (1), an integrator (4) for the rectified signal with an integration-terminating device for resetting to the value present at the beginning of integration at adjustable time intervals, a comparator (6) comparing the integration value with a reference variable, and a signal transmitter (12) responding to the reference variable being exceeded by the integration value. <IMAGE>