Derive equation for noise margins for CMOS invertor

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written 6.2 years ago by

hetalgosavi • 1.7k

• modified 6.0 years ago

Subject :- VLSI Design

Topic :- MOSFET Inverters

Difficulty - Medium

vlsi design

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1.7kviews

written 6.0 years ago by

hetalgosavi • 1.7k

To design Noise Margins

$NM_H$ = VOH – VIH

$NM_L$ = VIL – VOL

Step 1: Find VIL

$I_L$ = $I_D$

When Vin = VIL; nMOS is in saturation region and pMOS is in linear region

Differentiate w.r.t. Vin and substitute

Step 2: Find VIH

When Vin = VIH ; …

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