This module contains a pair of two gate to trigger converters, allowing key-down gate signals, or those from gate sequencers etc. to be converted into a much narrower trigger signal as required by some percussive effects. These may come in handy when adapting various drum sound generators to synthesizer use.

How to use this module:

Connect the inputs to a gate source. Connect the outputs to a module that requires a trigger input. For example, all "pulse" outputs of the gate sequencer could be converted to trigger pulses by putting one gate to trigger converter in line with the incoming clock signal.

Alternately, the module can be used as a hard wired adapter when adapting other circuits such as organ rhythm units to synthesizer use.

A little on how it works:

 
The schematic of the Gate to Trigger Converter.

Each of the two gate to trigger converter is functionally identically. It consists of a network designed to convert a positive going square or rectangular wave into a brief positive going pulse. An op-amp wired as a comparator cleans and buffers the resultant pulse. The output can be taken directly from the op-amp, or from the optional transistor buffered outputs, as shown in grey on the schematic (first run of PCBs only). One buffer has been omitted from the diagram for clarity.