A transistor is a switch controlled by voltage. Put two together and you get a "not" gate: in goes on, out comes off. Chain five of those in a circle and they chase each other forever, flipping on and off. How fast they flip tells you how fast a diamond computer could run.

Square law: I_D = k[(V_GS−V_T)V_DS − V_DS²/2] below saturation and k(V_GS−V_T)²/2 above, with k = μC_oxW/L. Diamond logic today is p-channel only, so the "pull-up" is a normally-on depletion transistor. That makes the low output level ratioed (never exactly zero) and costs static power whenever the output is low.

Same model as adamas.logic (transfer curve agrees to 3 decimal places) and the ring oscillator agrees with the ngspice deck circuits/spice/ring_oscillator.cir to about 10% (24.6 vs 22.4 ns at the defaults), the difference being the constant-capacitance node model. Parameters are placeholders until the PDK-0 monitor die is measured (experiments A-1 and D-2, chapter E4).