I\'m doing homework about inverter circuit. I have CMOS model like that. Are the

Question

I'm doing homework about inverter circuit.

I have CMOS model like that.

Are these models have information about L and W ????

Should I have to enter some values of L and W in a box on the picture?

.dc V1 0 3.3 M1 PMOS M2 NMOS V2 3.3 .MODEL CMOSN NMOS LEVEL 3 +TOX 7.9E-90 NSUB 1E17 GAMMA. 0.5827871 +PHI 0.7 VTO 0.5445549 DELTA 0 +UO 436.256147 ETA. 0 THETA 0.1749684 +KP 2.055786E-4 VMAX 8.309444 E4 KAPPA. 0.2574081 +RSH 0.0559398 NFS 1E12 TPG 1 +XJ 3E-7 LD 3.162278E-11 WD 7.046724E-8 +CGDO 2.82E-10 CGSO 2.82E-10 CGBO 1E-10 +CJ 1E-3 PB 0.9758533 MJ 0.3448504 +CJSW 3.777852E-10 MJSW 0.3508721) MODEL CMOSP PMOS LEVEL 3 TOX 7.9E-90 NSUB 1E17 GAMMA 0.4083894. PHI 0.7 VTO 0.7140674 DELTA. 0 UO 212.2319801 ETA 9.999762E-4 THETA 0.2020774. KP 6.733755E-5 VMAX 1.18 1551E5 KAPPA 1.5 RSH 30.0712458 NFS 1E12 TPG -1 XJ 2E-7 LD 5.000001E-13 WD 1.249872E-7 CGDO 3.09E-10 CGSO 3.09E-10 CGBO 1E-10 CJ 1.419508E-3 PB 0.8152753 MJ 0.5 CJSW 4.813504E-10 MJSW 0.5)

Explanation / Answer

No,

These models does not have information about W and L values.

and YES , you need to specify W and L values of each mosfet.

L value represent technology

example 90nm technology means L have minimum value of 90nm.(generally for 90 nm technology 100nm is taken as minimum value and not 90 nm)

simiaraly W is also having some minimum limits depending upon technology

example 90 nm technology Wminimum is 120 nm

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