Helical Latch For Scalable Boolean Logic Operations

    Authors

    R. Demara; R. Mercer;M. Ebel

    Comments

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    Abbreviated Journal Title

    Nanotechnology

    Keywords

    Nanoscience & Nanotechnology; Materials Science, Multidisciplinary; Physics, Applied

    Abstract

    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.

    Journal Title

    Nanotechnology

    Volume

    5

    Issue/Number

    3

    Publication Date

    1-1-1994

    Document Type

    Article

    Language

    English

    First Page

    137

    Last Page

    156

    WOS Identifier

    WOS:A1994PV49700001

    ISSN

    0957-4484

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