For A CMOS inverter with pMOS load (PU= Pull-Up element) and nMOS driver (PD= Pu

Question

For A CMOS inverter with pMOS load (PU= Pull-Up element) and nMOS driver (PD= Pull-Down element) with: VTn = 0.8 V, VTp = -0.7 V, (W/L)P = 4/1, (W/L)n = 2/1, VDD =3.9V,andn =p =1.5x10-5A/V2:

a- SketchtheVTCfortheCMOSinverterandidentifytheregionsof operation

b- Sketch the VTC and identify the regions of operation.

c- i- At slope of -1 (dVout/dVin = -1) of the VTC determine VinL|max, and

VOH|min

ii- At the other corner with slope of -1 for the VTC determine

VinH|min, and VOL|max.

iii- Calculate the High and the LOW Noise Margins (NMH and NML)

iv- As the Designer in charge, what would you do to the transistor

characteristics to improve the Noise Margins?

Explanation / Answer

in order to increase the noise margins the compatible volatges are taken for proper operation of circuit

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