Analog Integrated Circuit Design

2nd edition


0.18um CMOS process

1. unCox, Vtn, theta for NMOS

1-1. Schematic

1-2. HSPICE Netlist

* Problem 1.27 uCox, Vtn for 0.18um NMOS

 

* MOS model

.include p18_cmos_models_tt.inc

 

* main circuit

mn 1 2 0 0 nmos L=0.36u W=3.6u

 

* power supply

vdd 1 0 1.8

vgs 2 0 1

 

* analysis

.op

.dc vgs 0 1.8 1m

 

* options

.options post

.end

 

1-3. Simulation Result

unCox = 270 μA/V2
Vtn = 0.44 V

θ = 1.0 V-1

2. Lambda for NMOS

2-1. Schematic

2-2. HSPICE Netlist

* Problem 1.27 lambda for 0.18um NMOS

 

* MOS model

.include p18_cmos_models_tt.inc

 

* main circuit

mn 1 2 0 0 nmos L=0.36u W=3.6u

 

* power supply

vdd 1 0 1.8

vgs 2 0 1

 

* analysis

.op

.dc Vdd 0 1 1m

 

* options

.options post

.end

 

2-3. Simulation Result

λ = 0.182 V-1 @ L = 0.36 μm
λL = 0.066 μm/V

3. Cov/W for NMOS

3-1. Schematic

3-2. HSPICE Netlist

* Problem 1.27 Cov/W for 0.18um NMOS

 

* MOS model

.include p18_cmos_models_tt.inc

 

* main circuit

mn 0 1 0 0 nmos L=0.36u W=3.6u

 

* power supply

vgs 1 0 dc=0 ac=1

 

* analysis

.op

.ac dec 100 1 1k

 

* options

.options post

.end

 

3-3. Simulation Result

Cov = 3.95 fF @ W = 3.6 μm
Cov/W = 1.10 fF/μm

4. Cdb/W for NMOS

4-1. Schematic

4-2. HSPICE Netlist

* Problem 1.27 Cdb/W for 0.18um NMOS

 

* MOS model

.include p18_cmos_models_tt.inc

 

* main circuit

mn 0 0 0 1 nmos L=0.36u W=3.6u

 

* power supply

vb 1 0 dc=0 ac=1

 

* analysis

.op

.ac dec 100 1 1k

 

* options

.options post

.end

 

4-3. Simulation Result

Cdb = 1.47 fF @ W = 3.6 μm
Cdb/W = 0.41 fF/μm

5. uCox, Vtp for PMOS

5-1. Schematic

5-2. HSPICE Netlist

* Problem 1.27 uCox, Vtnp for 0.18um PMOS

 

* MOS model

.include p18_cmos_models_tt.inc

 

* main circuit

mp 0 2 1 1 pmos L=0.36u W=3.6u

 

* power supply

vdd 1 0 1.8

*vdd 1 0 5 *** for theta

vgs 1 2 1

 

* analysis

.op

.dc vgs 0 1.8 1m

*.dc vgs 0 1.8 1m *** for theta

 

* options

.options post

.end

 

5-3. Simulation Result

upCox = 76μA/V2
Vtp = 0.42 V

θ = 0.74 V-1

6. lambda for PMOS

6-1. Schematic

6-2. HSPICE Netlist

* Problem 1.27 lambda for 0.18um PMOS

 

* MOS model

.include p18_cmos_models_tt.inc

 

* main circuit

mp 0 2 1 1 pmos L=0.36u W=3.6u

 

* power supply

vdd 1 0 1.8

vgs 1 2 1

 

* analysis

.op

.dc vdd 0 1 1m

 

* options

.options post

.end

 

6-3. Simulation Result

λ = 0.38 V-1 @ L = 0.36 μm
λL = 0.14 μm/V

7. Cov/W for PMOS

7-1. Schematic

7-2. HSPICE Netlist

* Problem 1.27 Cov/W for 0.18um PMOS

 

* MOS model

.include p18_cmos_models_tt.inc

 

* main circuit

mp 0 1 0 0 pmos L=0.36u W=3.6u

 

* 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 = 3.76 fF @ W = 3.6 μm
Cov/W = 1.04 fF/μm

8. Cdb/W for PMOS

8-1. Schematic

8-2. HSPICE Netlist

* Problem 1.27 Cdb/W for 0.18um PMOS

 

* MOS model

.include p18_cmos_models_tt.inc

 

* main circuit

mp 0 0 0 1 pmos L=0.36u W=3.6u

 

* power supply

vb 1 0 dc=0 ac=1

 

* analysis

.op

.ac dec 100 1 1k

 

* options

.options post

.end

 

8-3. Simulation Result

Cdb = 1.26 fF @ W = 3.6 μm
Cdb/W = 0.35 fF/μm



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