Problem 4.14
1. Schematic
2. HSPICE Netlist
2-a. 0.18-µm CMOS process
* Problem 4.14 a. 0.18um process
* MOS model
.include p18_cmos_models_tt.inc
* main circuit
mp1 1 2 3 3 pmos L=0.18u W=531u
cl 1 0 25p
* current source
id 1 0 dc 0.8m
* voltage source
vdd 3 0 dc 1.8
vin 3 2 dc 0.55 ac 1
** vin dc value adjusted to ensure mp1 is in strong inversion
* analysis
.op
.ac dec 10 1k 100G
* options
.options post
.end
2-b. 45-nm CMOS process
* Problem 4.14 b. 45um process
* MOS model
.include p045_cmos_models_tt.inc
* main circuit
mp1 1 2 3 3 pmos L=45n W=112u
cl 1 0 25p
* current source
id 1 0 dc 0.8m
* voltage source
vdd 3 0 dc 1.8
vin 3 2 dc 0.55 ac 1
** vin dc value adjusted to ensure mp1 is in strong inversion
* analysis
.op
.ac dec 10 1k 100G
* options
.options post
.end
3. Simulation Result
fta [MHz] | |
0.18µm CMOS process | 93 |
45nm CMOS process | 72 |