UNIVERSAL ROTATE INVERT BUS ENCODING FOR LOW POWER VLSI

UNIVERSAL ROTATE INVERT BUS ENCODING FOR LOW POWER VLSI

Shankaranarayana Bhat M1 and D. Yogitha Jahnavi2

1Associate Professor, Department of Electronics and Communication Engineering,Manipal Institute of Technology, Manipal University, Manipal, Karnataka, India

2Student, Department of Electronics and Communication Engineering, Manipal Institute of Technology, Manipal University, Manipal, Karnataka, India

ABSTRACT

Power dissipation is an important design constraint in today’s CMOS VLSI design and is addressed widely by the researchers across the globe. Switching activity is one of the factors that affect dynamic power in a chip and several publications have suggested various techniques to reduce the same. Reduction of switching activity in the busses attains significance as bus width, bus capacitance and the clock are recording continuous uptrend. In this paper, we propose a technique for bus encoding, which, reduces the number of transitions on the bus and performs better than the existing methods such as bus invert coding and shift invert coding for random data in terms of switching activity, without the need for extra overhead in computation and circuit. However, irrespective of the bus width it needs three extra bits and does not assume anything about the nature of the data on the bus.

KEYWORDS

Bus encoding, Switching activity, CMOS VLSI, Power dissipation, Low Power Design

Original Source Link : http://aircconline.com/vlsics/V3N4/3412vlsics09.pdf

http://airccse.org/journal/vlsi/vol3.html