Helical Latch For Scalable Boolean Logic Operations
Abbreviated Journal Title
Nanoscience & Nanotechnology; Materials Science, Multidisciplinary; Physics, Applied
Nanomechanical computing elements which employ rotational symmetry and motion are designed and analyzed using a bounded continuum model. First, the Boolean logic functions of NOT, AND, OR, and XOR are realized using a helical latch, reset springs, and rod assemblies. Building upon these components, designs for shifters and two-level logic devices are developed. The helical latching mechanism calculates the Boolean output function as a positional displacement from a known reset state, which occurs exactly once during each 360-degrees instruction cycle. Operations of arbitrary word length can be performed by subdividing the logic disc into sectors where each sector operates on a single bit. Throughput can be increased by pipelining multiple-bit operands to yield a speedup which approaches a maximum value of (n + 2) as compared to a single-level of non-pipelined logic with n inputs. Generally, speedup is bounded by (n + 2)/p where p denotes the number of cycles between initiations of the pipe. An analysis of gate kinematics is performed to determine the device geometries and maximum operating frequencies for both non-pipelined and pipelined operation.
"Helical Latch For Scalable Boolean Logic Operations" (1994). Faculty Bibliography 1990s. 1024.