Comparative Analysis of 4-bit CMOS Multipliers

A fast and energy-efficient multiplier is always needed in electronics industry especially digital signal processing (DSP), image processing and arithmetic units in microprocessors. Multiplier is such an important element which contributes substantially to the total power consumption of the system. Multipliers of various bit-widths are frequently required in VLSI from processors to application specific integrated circuits (ASICs). Recently reported logic style comparisons based on fulladder circuits claimed complementary pass transistor logic (CPL) to be much more power-efficient than complementary CMOS. However, new comparisons performed on more efficient CMOS circuit realizations and a wider range of different logic cells, as well as the use of realistic circuit arrangements demonstrate CMOS to be superior to CPL in most cases with respect to speed, area, power dissipation, and power-delay products. The most important and widely accepted metrics for measuring the quality of multiplier designs propagation delay, power dissipation and area. This paper describes the comparative performance of 4-bit multipliers designed using TANNER EDA, using different logic design styles.