Figure 4: Complex operations coupling more mechanical gates.
From: Sub-kBT micro-electromechanical irreversible logic gate

The single OR gate (a) can be negated producing a NOR gate (b) by means of an additional electrically polarized cantilever, placed in front of the first one. (c) Outputs of the two configurations are reported as function of the possible inputs, highlighted in grey (00), red (01), green (11) and blue (10). Setting a threshold, represented by the dashed line, it is evident that the two configurations act as an OR or NOR gate.