CMP

dual unipolar comparator logic

CMP is a utility module comparing two voltages. Dual channel. It performs the logic operation A>B=C in a unipolar fashion, thus giving about 0-11V outputs. A is your main input, B is normalled to +12V, and run through the attenuator knob, to set a threshold voltage where the output goes high.

This sort of logical operation can translate a saw or triangle VCO into a square wave with variable pulse-width. An LFO into a gate pattern, or a random CV sequence into a random gate pattern. Put in two LFOs and you get a swing clock pattern. Two VCOs and you get that metallic twang as they phase around.

It’s through-hole construction is very easy for DIY soldering. The opamp specified is a LM358, which is the cheapest way to get a 0V pushed output.
Does not use the -12V rail, we’re clamped to 0 and +12V. Power draw is listed at 5mA but it's closer to 1mA in normal operation, and maximally 10-15 if the +11V out is patched into another module's -11V out, causing a fight at the 1 kiloohm output.

https://karltron.com/cmp/