# Problem 3.3

## Problem 3.3

### a. Threshold voltage

#### a-2. HSPICE Netlist

* Problem 3.3 a.

* MOS model
.include p35_cmos_models_tt.inc

* main circuit
mn1 1 1 0 0 nmos L=0.4u W=10u
mn2 2 1 0 0 nmos L=0.4u W=10u
mn3 3 1 0 0 nmos L=0.4u W=10u delvto=5m

* current source
i1 0 1 100u

* voltage source
v2 2 0 1
V3 3 0 1

* analysis
.op

* options
.options post

.end

#### a-3. Simulation Result

 Variation Iout [µA] ΔIout [%] Typical 104.7 0 Vtn: +5mV 99.7 -4.8

### b.Carrier mobility

#### b-2. HSPICE Netlist

* Problem 3.3 b.

* MOS model
.include p35_cmos_models_tt.inc

* main circuit
mn1 1 1 0 0 nmos    L=0.4u W=10u
mn2 2 1 0 0 nmos    L=0.4u W=10u
mn3 3 1 0 0 nmos    L=0.4u W=10u mulu0=1.05

* current source
i1 0 1 100u

* voltage source

v2 2 0 1
V3 3 0 1

* analysis
.op

* options
.options post

.end

#### b-3. Simulation Result

 Variation Iout [µA] ΔIout [%] Typical 104.7 0 μn: +5% 109.3 4.4

### c. Gate length

#### c-2. HSPICE Netlist* Problem 3.3 c.

* MOS model
.include p35_cmos_models_tt.inc

* main circuit
mn1 1 1 0 0 nmos    L=0.4u    W=10u
mn2 2 1 0 0 nmos    L=0.4u    W=10u
mn3 3 1 0 0 nmos    L=0.42u   W=10u

* current source
i1 0 1 100u

* voltage source
v2 2 0 1
V3 3 0 1

* analysis
.op

* options
.options post

.end

#### c-3. Simulation Result

 Variation Iout [µA] ΔIout [%] Typical 104.7 0 L: +5% 94.9 -9.4
Subscribe
Notify of