1U Signum - Intellijel Tile White Panel / PCB Set | Nonlinear Circuits

Those that build a lot of NLC modules will know this is one of Andrew's favorite circuits. The diff-rect has appeared on the Neuron, 1050 mix/sequencer, triple Sloth, GENiE and 8 of them make up the Let's Splosh. It is great for mixing audio and/or CV signals to get all kinds of unexpected and interesting results. The 2012 Pinky Site has some more details.