Problem 3.9
1. Schematic
2. HSPICE Netlist
* Problem 3.9
* MOS model
.include p35_cmos_models_tt.inc
* main circuit
mn1 3 4 0 0 nmos L=0.8u W=20u
mp2 3 2 1 1 pmos L=0.8u W=20u
mp3 2 2 1 1 pmos L=0.8u W=20u
* current source
id 2 0 dc 100u
* voltage source
Vdd 1 0 dc 3.3
vin 4 0 dc 0.782 ac 1
** vin dc value adjusted to ensure mn1 is in active mode
* analysis
.op
.ac dec 10 1k 100G
* options
.options post
.end
3. Simulation Result
| Variation | AV [V/V] | Veff [mV] | Ids1 [µA] |
| W/L = 10um/0.4µm (Example 3.2) | 22.1 | 222 | 100.8 |
| W/L = 20um/0.8µm (Problem 3.9) | 57.4 | 231 | 100.4 |
