The Diode Director is a 5-input, 2 output OR Combiner / Router. Primarily aimed at merging, selection and distribution of clock/gate signals, the module can give interesting results with other waveforms too.
Each of the 5 Inputs pass through a low-voltage drop diode followed by a 3-way (centre off) switch. The switches allow signals to be muted or routed to one of the two Outputs.
In logic terms (ie. Clock/Gate signals) mixing signals through diodes in this way gives a logic OR function, combining the signals and going Hi when either any input signal goes Hi. With other waveforms the diodes do two things: i) they remove all negative voltages, ii) the output is the most positive voltage at any point.
The diagram highlights this showing one gate and two bipolar inputs and the resulting unipolar output.
The Diode Director appeared as the UTL6C in the pre-2013 modular series.
Current: +ve 5mA, -ve 0mA