Analogue electronic timing relay - has briefly delayed resetting time for exact measurement of pulse lengths behind filters

摘要

The timing circuit contains two dual and assymetrically connected R.C. elements. Between the potential points a capacitor resistor element is cut in by way of a diode which conducts in the direction of voltage pick-up points. The first potential point is connected to the emitter of a p-n-p transistor, whose base is connected between the third resistor and diode and whose collector is connected in parallel to the potential bar and to the base of a n-p-n amplifier transistor. The collector of this is connected to the positive potential of an auxiliary capacitor and its emitter to the control electrode of a switching and discharge thyristor.