1 Salendra.Govindarajulu et. / (IJS) International Journal on omputer Science and ngineering Vol. 5, 21, High Performance VLSI esign Using ody iasing in omino Logic ircuits Salendra.Govindarajulu 1, r.t.jayachandra Prasad 2 1 ssociate Professor,, RGMT, JNTU 2 Principal, RGMT, JNTU bstract ynamic domino logic circuits are widely used in modern digital VLSI circuits. These dynamic circuits are often favoured in high performance designs because of the speed advantage offered over static MOS logic circuits. The main drawbacks of dynamic logic are a lack of design automation, a decreased tolerance to noise and increased power dissipation. Ynamic MOS circuits, featuring a high speed operation are used in high performance VLSI designs.

M Horowitz EE371 Lecture 2 2 Readings • Readings – Techniques for High-speed Implementation of Nonlinear Cancellation, Sanjay Kasturia and Jack H. Winters •Overview: – Your project will be the design of a circuit that processes the input data from a high-speed I/O. This processing is generally done in a mixed signal manner today, but. Flip-Flop Circuit Families: Comparison of Layout and Topology for Low Power VLSI Circuits FREE DOWNLOAD [PDF] R Uma –. Abstract—The pertinent choice of flip-flop topologies is an essential importance in the design of VLSI integrated circuits for high speed and high performance CMOS.

In this work, different types of N gates with onventional ody ias & Forward ody ias inverters are compared with their performances and the high performance circuit was specified. The different design styles are compared by performing detailed transistor-level simulation on bench mark circuits using tools of SH3 and Microwind3 in sub-micron regime. The simulated results are compared in terms of power dissipation, propagation delay, PP and area. Index Terms MOS, onventional ody ias, omino logic, ynamic power, Forward ody ias, Full-swing. INTROUTION The power consumed in high performance microprocessors has increased to levels that impose a fundamental limitation to increasing performance and functionality [1] [3]. Lirik jikalau cinta. If the current trend in increasing power continues, high performance microprocessors will soon consume thousands of watts. The power density of a high performance microprocessor will exceed the power density levels encountered in typical rocket nozzles within the next decade [2].

The generation, distribution, and dissipation of power are at the forefront of current problems faced by the integrated circuit industry [1] [5]. The application of aggressive circuit design techniques which only focus on enhancing circuit speed without considering power is no longer an acceptable approach in most high complexity digital systems. Ynamic switching power, the dominant component of the total power consumed in current MOS technologies, is quadratically reduced by lowering the supply voltage. Lowering the supply voltage, however, degrades circuit speed due to reduced transistor currents. Threshold voltages are scaled to reduce the degradation in speed caused by supply voltage scaling while maintaining the dynamic power consumption within acceptable levels [1] [5]. T reduced threshold voltages, however, subthreshold leakage currents increase exponentially.

Nergy efficient circuit techniques aimed at lowering leakage currents are, therefore, highly desirable. Omino logic circuit techniques are extensively applied in high performance microprocessors due to the superior speed and area characteristics of domino MOS circuits as compared to static MOS circuits [7] [8]. However, deep sub micrometer (SM) domino logic circuits utilizing low power supply and threshold voltages have decreased noise margins [9] [11]. S on-chip noise becomes more severe with technology scaling and increasing operating frequencies, error free operation of domino logic circuits has become a major challenge [9], [1], [11]. The focus of this paper is to implement different types of N gates with onventional ody ias & Forward ody ias inverters and they are compared with their performances. The organization of the paper is as follows. Brief review of the sources of power dissipation in MOS circuits is provided in Section II.

In Section III various ircuit techniques in domino logic circuits for power reduction and delay reduction are proposed. In Section IV simulation and implementation results are presented. Finally, conclusions are presented in Section V. SOURS OF POWR ISSIPTION The power consumed by MOS circuits can be classified into two categories. Ynamic Power issipation For a fraction of an instant during the operation of a circuit, both the PMOS and NMOS devices are on simultaneously.

The duration of the interval depends on the input and output transition (rise and fall) times. Uring this time, a path exists between V dd and G nd and a short-circuit current flows. However, this is not the dominant factor in dynamic power dissipation.