«Signal – Trigger» Converter of Harald Antes

The incoming signals are summed up. Every time when the summed signal changes polarity (moving through zero) a trigger is generated. Moving from plus to minus generates a trigger at the negative trigger output, moving from minus to plus generates a trigger at the positive trigger output. Trigger length is about 1msec. The gate output stay high as long as the summed input signal stays positive. Trigger and gate voltage is +5V.