A Standard-Cell Self-timed Multiplier for Power and Area Critical Synchronous Systems

Kip C. Killpack Eric Mercer Chris J. Myers

To appear at 19th Conference on Advanced Research in VLSI (ARVLSI01), Salt Lake City, UT, 14-16 March 2001


Abstract

This paper describes the design of a standard-cell self-timed multiplier for use in power and area critical synchronous systems. The area of this multiplier is bounded by N rather than N^2 as seen in more traditional combinational parallel array designs, where N is the word size. Power has a polynomial growth with word size, but has a coefficient that is much smaller than that seen in a combinational array design. Although the multiplier is self-timed, it can be embedded in synchronous systems as a combinational element. This paper presents latency, area, and power estimates for the multiplier implemented at various word sizes, and compares these numbers with a traditional combinational array multiplier. The self-timed multiplier uses 1/3 the power and 1/7 the area of the combinational design for a 24-bit word size.


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