Comparators

Dual comparator

This COMPARATORS module is very useful utility module to create GATE signal and pulses from another source of signal. It can be used either to process modulation CVs or audio signal (though i's not a GATE extractor as it can be found with envelope followers). Basically, one connect a modulation source (LFO output, noise generator...) to INPUT A. As long as the input voltage is smaller than the voltage threshold set by the potentiometer THRESHOLD A (over a -8V to +8V range), the GATE OUT remains low (0V) and as long as the input voltage is higher than the threshold then GATE OUT is high (5V) and the LED is lit. There are two other outputs called ON TRIG and OFF TRIG. At these outputs, 2ms pulses are triggered each and everytime that the input voltage crosses the trheshold voltage. A 2ms pulse will be appear at ON TRIG when the input voltage becomes higher than the threshold, a 2ms pulse will be appear at OFF TRIG when the input voltage becomes smaller than the threshold.

The second COMPARATOR submodule has one more input : CV threshold. This CV makes it possible to control the threshold level with an external module. When no jack is inserted in the CV input, the CV THRESHOLD B acts the same as in the section A but over a range of 0V to +8V