An Asynchronous Pipelined 32×32-bit Iterative Multiplier Using Hybrid Handshaking Protocol

An asynchronous pipelined 32×32-bit iterative multiplier is presented in this paper. The multiplier supports 32×32-bit integer multiplication of both signed and unsigned operands. A 2-phase micropipeline latch controller is used which controls a 4-phase pipeline with standard transparent level sensitive latches. The design employs the modified Booth algorithm diminishing 8 bits at a time with an iterative structure. A sign extension algorithm is also employed in this work. Furthermore, the early termination scheme speeds up the multiplication operation. The multiplier consists of a total of 10700 CMOS elements and completes an 32×32-bit multiplication in 12 ns under the typical conditions. This work is also very low power and costs only 50% energy per operation of that of Amulet3i multiplier.