The TLN-863 Max Min Generator is a MUUB implementation of a Linear Or/And Gate from Jung's Op-Amp Cookbook. This circuit is very similar to Ken Stone's Analog Logic circuit and Dave Brown's Analogic circuit. With the MODE switch set to the MAX position, the output will be the maximum of inputs 1-3 (Linear Or). With the MODE switch set to the MIN position, the output will be the minimum of inputs 1-3 (Linear And). The THRESHOLD pot sets a voltage that is normalled to the input jacks when no signal is plugged into the jacks. This turns the circuit into a "Clipper" when the MODE switch is set to MIN (output voltage will not go below the THRESHOLD), and a "Clamper" when the MODE switch is set to MAX (output voltage will not exceed the THRESHOLD).
The TLN-863 pictured at left features two independent channels (A & B) with the following controls:
- THRESHOLD A/B: sets the voltage threshold for the Clipper/Clamper feature.
- MODE A/B: sets the operational mode to Min/And/Clipper or Max/Or/Clamper.
Note that the panel layout for this module (and the rest of my MUUB utility modules) uses the smaller type of knob found on Encore Electronic's UEG and Frequency Shifter. Most people will probably hate this, but I wanted to get the most functionality in the least amount of space while still maintaining some semblance to the MOTM standard. To this end, all of my MUUB utility modules use a new layout grid that allows up to 6 pots with 4 jacks, or 4 pots with 8 jacks, on a 1U wide module.
The TLN-863 Max Min Generator can be built using MUUB daughterboards.
The first version I built (Rev 1) used two MUUB-4 boards and two MUUB-2 boards with the MUUB-2 boards stacked on top of each other. That version was a bit cumbersome to put together. I then realized I could simplify things considerably by using two MUUB-3 boards (Rev 2). Also, (for Rev 2) I noticed that there was no need to use small knobs since there is sufficient room for big knobs using the standard MOTM grid.
Contact me if you wish to purchase PCBs.
Total current draw for TLN-863 is 17 mA @+15V and 17 mA @-15V.