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Method 2 ： Directly on the interface search Mid search , Enter your name and press enter , Then select the device in the process library and right-click Add In stance, Then press enter .

Selected devices ：n mos2v vdd gnd vdc.（ Everyone's craft library is different ,nmos The parameters of do not need to be modified ）

vdc Medium DC voltage One for vds, One for vgs.

Connect and save the check

Shortcut key w attachment , Then click the save and check button .

Show no errors It shows that the schematic diagram has no problem and can be simulated .

Simulation preparation

establish ADE L Simulation

Click on Launch----ADE L

Select simulation file

Because this is our first simulation , We need to select the corresponding process library

Click on Setup-----Modul Library

Double click the second red box in the above picture , Click on ...（Browse）, Choose the location of your own process library , And then click models---spectre, Finally, select the suffix corresponding to the process library .scs The file of （ Choose according to your own process library , Some are rf**.csc）.

We can only select the process library we need to simulate .

And then in Section Select the corresponding box in this column tt.

add to vds and vgs

Click on Variables----Copy From Cellview

take vds Set to 1.8,vgs Set to 0.9, The purpose is to let them start in a saturated environment .

mos Output characteristic curve

explain ： Flow through mos Tube current id With vds Change trend of .

Add output

Click on Outputs----To Be Plotted-----Select On Design, Then we click... In the schematic diagram mos The leakage pole of the tube , An oval circle appears, indicating that click to add it successfully , Then press ESC The oval circle disappears .

We right-click output , Click on Edit You can view its information .

Then we click the green simulation symbol , Start emulating .

The simulation results are as follows ：

If your simulation waveform doesn't come out , You can go back to the step of modifying your simulation library .

Simulation curves under different gate source voltages

If we want to get the trend of simulation curve under different gate source voltage , We need to do Parameter scanning .

We first close the simulation window , And then choose ADE L In the menu bar list Tools----Paramtric Analysis, Enter the following interface ：

Then we start to modify the parameters ：

choice vgs, Simulation range 0-1.8, Set to linear simulation , The simulation step is 0.3 , Then click the green button to start the simulation .

After loading the progress bar, the result will be displayed ：

Next, we simulate the input characteristic curve .

mos Input characteristic curve of the tube

explain ： Flow through mos Tube current id With vgs Change trend of .

Set up dc

Close the simulation window first , Right click dc---Edit--- take vds Turn into vgs---- Click on ok

Then we click the green simulation button , The simulation results are as follows ：

Simulation curves under different leakage sources

Only one is shown here , Next, we can obtain multiple curves by parameter scanning ;

First, close the simulation interface , And then click Tools----Paramtric Analysis, Then set the parameters , choice vgs, Simulation range 0-1.8, Set to linear simulation , The simulation step is 0.3 , Then click the green button to start the simulation .

see mos Various parameters of the tube

Set up dc

Right click dc---Edit, Uncheck the Design Variable

Simulation

Directly click the green simulation button , Then return to the schematic , Right mouse click , choice Annotations----DC Operating Point, Then we can see that the specific parameters in the schematic diagram are displayed .

see mos Grid area

Continue in the schematic , Right mouse click ----Annotations-----Set up, Then jump out of a window ：

stay Cell Select the pipe type in the schematic diagram , In the blank DC Operating Point Double click to select region, And then click Apply--ok--- Click on the pop-up window Apply .....-----ok, Finally, it is shown in the schematic diagram .

According to the picture ：region=2, explain mos The tube is in the saturation zone .

see mos Other parameters of the tube

We are ADE L Click... In the panel menu bar Result---Print-------DC Operating Point ,r Then click mos tube ,mos Other parameters are listed .

Graph of gate source capacitance versus gate source voltage

choice vgs Variable

Close the simulation window above , stay ADE L Right click dc---Edit---- Check Design Variable----vgs

Modify the output （Outputs）

First delete the output

stay Outputs Right click in ----Edit, Add name c, And then click open, Write the expression of gate source capacitance , Select... In the pop-up window os, Then a small window pops out , We need to click on the schematic mos tube , Then select... From the small window list cgs, Copy the formula on the panel , Close the panel , Add the copied formula to c below , Click on OK.

Last Outputs The grid source capacitance inside is displayed ; Then click the green simulation button to run the simulation ：

This picture looks a little strange , Let's edit the output c, Add a Minus sign , Then continue to run the simulation ：

At this time, the image looks much better .

gmid_idw The graph of

modify dc And Outputs Parameters

Close other simulation windows , Right click dc---Edit-- Uncheck the Design Varibale---OK.

Simulation abscissa gmid, Ordinate idw Image

Delete c, Right click mouse ---Edit---- Enter a name gmid_idw, Then start editing the formula we need .

Click on open-----os--- Click on mos Take care of it ------ Select 【gmoverid】---- then 【CTRL + c】 Copy expression , Click below Function Panel In the search box of WA------ choice waveVsWave

The expression appears after clicking , At this time, the abscissa has been completed .

Then don't move , Start working on the ordinates , In the list list Select current id , Under the expression, click Green button

Then add it

w I can't find it in the small window , We need to close the small window , Click on the top right corner Tools----Browser, A window pops up .

Then we click on the coordinates 【+】, And then click 【instance 】, And then click 【M0】, Right pull out the information window , Choose the last one w(m)=...., Select and right-click , choice 【Calculator】

Then the expression comes out , Then we click the division sign next to the expression 【/】, We copy the calculated expression , Place the expression in y Axis coordinates there .

Click on the Apply, Finally, the total expression appears at the top , We copy it , Paste it under the corresponding name , Click on OK.

Click the simulation green button to run the simulation ：

！！ If the simulation does not show , Don't panic , We can right-click dc-----Edit--- Check Design variable , Then run it again .

We can use logarithm to display the image , Right click on the ordinate , Check 【Log Scale 】

Under different channel lengths gmid_idw Image

modify mos Tube length

Select... In the schematic mos tube , Press the shortcut key 【q】, take mos The length of the tube is changed to L, Then click the save and check button .