Volume No: 2(2015), Issue No: 1 (January) January 2015 www.ijmetmr.com Page 212 ISSN No: 2348-4845 International Journal & Magazine of Engineering, Technology, Management and Research A Peer Reviewed Open Access International Journal Abstract: In modern digital VLSI design, domino logic style cir- cuits are widely used. The CMOS domino logic circuit dissipates very low standby power and exhibits less area. We design a comparator circuit which uses foot- ed domino logic and also implement a current mirror circuit in the design, to enhance the speed of the com- parator. This paper emphasizes a CMOS comparator design to detect full match or mismatch of the binary input. The proposed design consumes low leakage power and had a higher speed, than other circuit. The delay, leakage power and average power of the pro- posed CMOS Comparator circuit have also been calcu- lated and then it is compared with the Footed Domino Logic Comparator circuit with same parameter. The cir- cuit has been simulated in 45nm CMOS technology on Cadence Tool for high fan-ins (4, 8, 16, 32& 64 bits). INTRODUCTION: An integrated circuit is an electronic circuit in which many devices such as transistors, diodes, resistors, capacitors etc., are fabricated on a single small sili- con chip. It is different from a discrete circuit, which is built by connecting separated devices. In this case each device is fabricated separately and then all the devices are assembled together to make an electronic circuit. Integrated circuits are produced by using the same processes as those for manufacturing transistors and diodes etc. The different components in an IC are isolated from each other by isolation diffusion with in the silicon chip and are interconnected by an aluminum layer that serves as a wire. Nandha Kumar.P M.Tech (VLSI System Design), Dept of Electronics and Communication Engineering, Institute of Aeronautical Engineering. In integrated circuit design, physical design is a step in the standard design cycle which follows after the circuit design. At this step, circuit representations of the com- ponents (devices and interconnects) of the design are converted into geometric representations of shapes which, when manufactured in the corresponding lay- ers of materials, will ensure the required functioning of the components. This geometric representation is called integrated circuit layout. This step is usually split into several sub-steps, which include both design and verification and validation of the layout. The rapid technology advances in Integrated circuits (ICs) technology accelerated during and after 1980’s and one of the most influential factors for such a rapid advance in technology scaling, that is, the reduction in MOS transistor feature size. The MOS feature size is typically measured by the MOS transistor channel length. During the last 24 years the minimum features size has evolved from 6 to 0.35µm By the year 2000, the minimum feature size is 0.18 µm after the year 2010 the size has evolved from nano meter technology. Current mirror circuit : A current mirror is a circuit designed to copy a current through one active device by controlling the current in another active device of a circuit, keeping the output current constant regardless of loading. The current be- ing ‘copied’ can be, and sometimes is, a varying signal current. Conceptually, an ideal current mirror is simply an ideal inverting current amplifier that reverses the current direction as well or it is a current-controlled current source (CCCS). The current mirror is used to provide bias currents and active loads to circuits. K.Ravi Assistant Professor, Dept of Electronics and Communication Engineering, Institute of Aeronautical Engineering. Design of Low Power CMOS Comparator in UDSM Technology