Area Efficient Layout Design Analysis of CMOS Barrrel Shifter

Barrel Shifter plays an important role in the data shifting and data rotation. It is having application in many areas. The Barrel Shifter is mainly use for the simplification of the data shifting. The Arithmetic and the Logical Shifters can also be replaced by the Barrel Shifter Because with the rotation of the data it also provide the application the data right, left shifting either arithmetically or logically. The purpose of this paper is to design the two bit barrel shifter using universal gates with the help of CMOS logic and the most important two 2:1 multiplexers (mux). The further advanced version of the barrel Shifter is 4 bit data shifting, which is also proposed here. In this paper different design methodologies are used such as standard cell based design, semicustom design and full custom design of the Barrel Shifter to reduce area, power and size of the circuit. The paper analyzes and optimizes area and power of the Barrel Shifter using 45 nm technologies. KeywordALU, Barrel Shifter, CMOS, Layout, Level Shifter, Microwind tool, Multiplexer, NMOS, PMOS, Shift Register, Transistor.