NDLI: Using Memristor Technology for Multi-value Registers in Signed-digit Arithmetic Circuits

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Using Memristor Technology for Multi-value Registers in Signed-digit Arithmetic Circuits

Content Provider	ACM Digital Library
Author	Reichenbach, Marc Söll, Christopher Röber, Jürgen Fey, Dietmar Weigel, Robert Biglari, Mehrdad
Abstract	Signed-digit (SD) arithmetic exploits positive and negative digits requiring more than two states. It is long known that an addition using trits, i.e. each digit stores not only a 0 or a 1 but also either 2 or -1, requires only a constant number of steps independent of the operands' word length. However, current processors could not profit from that due to the lack of fast, dense and CMOS compatible memory cells that can store reliably multiple states. Memristors offer these features making it necessary to re-evaluate different SD number representations and to evaluate the consequences of an implementation of a multi-value register file with memristors concerning latency, area and energy consumption. Using memristors as multi-value register reduces latency and area on one side compared to flip-flop based memories. On the other side this requires additional sophisticated control circuitry to implement ADCs/DACs, current limiting circuits and to generate control signals to read, write and erase memristors. The paper determines the break-even points at which ternary circuits attached to memristor based registers show better energy-delay products and less area consumption and how much power consumption these improvements cost. By layout synthesis is shown that ternary adders with trit-storing memristors can reduce the latency for a word length of 16 digits about 19% and about 52% for 512 digits compared to a binary carry-look-ahead (CLA) adder with nearly the same power consumption.
Starting Page	442
Ending Page	454
Page Count	13
File Format	PDF
ISBN	9781450343053
DOI	10.1145/2989081.2989124
Language	English
Publisher	Association for Computing Machinery (ACM)
Publisher Date	2016-10-03
Publisher Place	New York
Access Restriction	Subscribed
Subject Keyword	Signed-digit arithmetic Memristive computing A/d interfaces for memristors Multi-value memristors
Content Type	Text
Resource Type	Article

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