Analog Integrated Circuit Design

2nd edition


45nm CMOS process

1. unCox, Vtn, θ for NMOS

1-1. Schematic

1-2. HSPICE Netlist

* Problem 1.27 uCox, Vtn for 45nm NMOS

 

* MOS model

.include p045_cmos_models_tt.inc

 

* main circuit

mn 1 2 0 0 nmos L=90n W=0.9u

 

* power supply

vdd 1 0 1.2

vgs 2 0 1

 

* analysis

.op

.dc vgs 0 1.2 1m

 

* options

.options post

.end

 

1-3. Simulation Result

μnCox = 390 μA/V2
Vtn = 0.40 V

θ = 1.62 V-1

 

2. Lambda for NMOS

2-1. Schematic

2-2. HSPICE Netlist

* Problem 1.27 lambda for 45nm NMOS

 

* MOS model

.include p045_cmos_models_tt.inc

 

* main circuit
mn 1 2 0 0 nmos L=90n W=0.9u

 

* power supply
vdd 1 0 1.2
vgs 2 0 0.5

 

* analysis
.op
.dc Vdd 0 1 1m

 

* options
.options post

.end

 

2-3. Simulation Result

λ = 0.263 V-1 @ L = 0.09 μm
λL = 0.024 μm/V

 

3. Cov/W for NMOS

3-1. Schematic

3-2. HSPICE Netlist

* Problem 1.27 Cov/W for 45nm NMOS

 

* MOS model

.include p045_cmos_models_tt.inc

 

* main circuit
mn 0 1 0 0 nmos L=90n W=0.9u

 

* power supply
vgs 1 0 dc=0 ac=1

 

* analysis
.op
.ac dec 100 1 100MEG

 

* options
.options post

.end

 

3-3. Simulation Result

Cov = 0.525 fF @ W = 0.9 μm
Cov/W = 0.58 fF/μm

 

4. Cdb/W for NMOS

4-1. Schematic

4-2. HSPICE Netlist

* Problem 1.27 Cdb/W for 45nm NMOS

 

* MOS model
.include p045_cmos_models_tt.inc

 

* main circuit
mn 0 0 0 1 nmos L=90n W=0.9u

 

* power supply
vb 1 0 dc=0 ac=1

 

* analysis
.op
.ac dec 100 1 100MEG

 

* options
.options post

.end

 

4-3. Simulation Result

Cdb = 0.780 fF @ W = 0.9 μm
Cdb/W = 0.87 fF/μm

 

5. upCox, Vtp, θ for PMOS

5-1. Schematic

5-2. HSPICE Netlist

* Problem 1.27 uCox, Vtnp for 45nm PMOS

 

* MOS model
.include p045_cmos_models_tt.inc

 

* main circuit
mp 0 2 1 1 pmos L=90n W=0.9u

 

* power supply
vdd 1 0 1.2

*vdd 1 0 1.5 *** for theta

vgs 1 2 1

 

* analysis
.op
.dc vgs 0 1.2 1m

*.dc vgs 0 1.5 1m *** for theta

 

* options
.options post

.end

 

5-3. Simulation Result

upCox = 57 μA/V2
Vtp = 0.38 V

θ = 0.94 V-1

6. lambda for PMOS

6-1. Schematic

6-2. HSPICE Netlist

* Problem 1.27 lambda for 45nm PMOS

 

* MOS model

.include p045_cmos_models_tt.inc

 

* main circuit

mp 0 2 1 1 pmos L=90n W=0.9u

 

* power supply

vdd 1 0 1.2

vgs 1 2 0.5

 

* analysis

.op

.dc vdd 0 1 1m

 

* options

.options post

.end

 

6-3. Simulation Result

λ = 0.319 V-1 @ L = 0.09 μm
λL = 0.029 μm/V

7. Cov/W for PMOS

7-1. Schematic

7-2. HSPICE Netlist

* Problem 1.27 Cov/W for 45nm PMOS

 

* MOS model
.include p045_cmos_models_tt.inc

 

* main circuit
mp 0 1 0 0 pmos L=90n W=0.9u

 

* power supply
vgs 1 0 dc=0 ac=1

 

* analysis
.op
.ac dec 100 1 1k

 

* options
.options post

.end

 

7-3. Simulation Result

Cov = 0.535 fF @ W = 0.9 μm
Cov/W = 0.59 fF/μm

 

8. Cdb/W for PMOS

8-1. Schematic

8-2. HSPICE Netlist

* Problem 1.27 Cdb/W for 45nm PMOS

 

* MOS model
.include p045_cmos_models_tt.inc

 

* main circuit
mp 0 0 0 1 pmos L=90n W=0.9u

 

* power supply
vb 1 0 dc=0 ac=1

 

* analysis
.op
.ac dec 100 1 100MEG

 

* options
.options post

.end

 

8-3. Simulation Result

Cdb = 0.008 fF @ W = 0.9 μm
Cdb/W = 0.85 fF/μm



Leave a Reply

Your email address will not be published.