ADS Tutorial # 6 Customize MOSFET Model and Simulation ppt

From Component Pallet In component pallet, find “Device-MOS” and choose “Bsim3”, as shown in Figure 1.. According to the application, different MOSFET model may be taken.. Detailed para

ADS Tutorial # 6 Customize MOSFET Model and Simulation

1 Circuit Construction

a From Component Pallet

In component pallet, find “Device-MOS” and choose “Bsim3”, as shown in Figure 1 According to the application, different MOSFET model may be taken

Figure 1

b Detailed parameters in “Bsim3” model are shown in Figure 2 If there is no value of any parameter, it means the default value is taken The default value for each parameter can be found in http://www-device.eecs.berkeley.edu/~bsim3/ website

Figure 2

c Above Bsim3 model, there is a MOSFET model, “NMOS” Place it on schematic Make sure the model name use in NMOS symbol is matched that in Bsim 1 model,

as shown in Figure 3

Figure 3

2 Do DC simulation on a single MOSFET transistor (Figure 4)

a Sweep Vds and measure Id, I-Probe 1

b Parameter sweep Vgs

Figure 4

c Id-Vds with parameter sweeping Vgs (Figure 5)

m1 Vds=

I_Probe1.i=0.002 Vgs=3.000000 3.500

m2 Vds=

I_Probe1.i=0.001 Vgs=2.500000 4.100

0.5

1.0

1.5

2.0

2.5

0.0

3.0

Vds

m2

Figure 5

3 Simulate common-source amplifier with drain resistance load

a Use DC simulation to find out the bias point, as shown in Figure 6

(a)

1 2 3 4

0 5

Vgs

(b)

Figure 6

(a)

m1 freq=

dB(Vo/Vi)=10.778 14.14GHz

5 6 7 8 9 10

11

12

13

4 14

freq, Hz

m1

(b)

Figure 7