Reversible Logic-Based Concurrently Testable Latches for Molecular QCA
Nanotechnologies, including molecular Quantum dot Cellular Automata (QCA), are susceptible to high error rates. In this paper, the authors present the design of concurrently testable latches (D latch, T latch, JK latch, and SR latch), which are based on reversible conservative logic for molecular QCA. Conservative reversible circuits are a specific type of reversible circuits, in which there would be an equal number of 1's in the outputs as there would be on the inputs, in addition to one-to-one mapping. Thus, conservative logic is parity-preserving, i.e., the parity of the input vectors is equal to that of the output vectors.