SCALING OF MOS CIRCUITS m .pptx

this ppt explains about scaling parameters of the mosfet it is basically vlsi subject

1. SCALING OF MOS CIRCUITS

2. What is scaling: The process of reduction of feature size(L) and line width(W) is called scaling. Why scaling: Scaling leads to improved performance more transistor on die, overall fabrication cost is reduced . Impact of scaling is characterized in terms of several indicators Minimize feature size Number of gates on one chip Power dissipation Maximum operational frequency Production cost

3. Scaling models: Three types of scaling models are used in vlsi Combined voltage(V) and Dimension(D)scaling model : We have consider two scaling factors α , β 1/ β is the scaling factor for supply voltage (vdd) and gate oxide thickness( tox ) 1/ α is the scaling factor for all linear dimensions Constant electric field model : α = β Constant voltage scaling model : β =1