Design and Comparison of Low Power & High Speed 4-bit Alu

An Arithmetic logic Unit (ALU) is an integral part of a computer processor. It has the capability of performing a no. of different arithmetic and logic operations such as addition, subtraction, bit-shifts and magnitude comparison. ALUs of various bit-widths are frequently required in very large-scale integrated circuits (VLSI) from processors to application specific integrated circuits (ASICs). In this paper, we present the design of a high performance 32-bit ALU using CMOS & BiCMOS technology for high speed applications and compare these two w.r.t. Speed, Area, Power Dissipation and Power Delay Product. The comparison of CMOS to BiCMOS often seen in the literature shows the delay of single stage circuits driving a capacitive load, with the BiCMOS circuit exhibiting a bold advantage. TANNER EDA Tools are used for schematic layout simulation as well as the schematic versus layout comparison. The simulation technology used is MOSIS 500nm [1] Keywords—32-bit ALU, CMOS, BiCMOS. 1-Bit ALU logic circuit, Complementary Static Logic (CSL).