Simulation of Created Design

1

• Simulation of Created Design
• Documentation on the simulation process of a
  basic
• injector-separation channel model design

2
The Simulation Process

• In this simulation, a sample will be passed
  into the injector, and Injected into the
  separation channel
• This is where the different species of the
  product will begin to separate from each other
• A signal of when each species passes a detector
  will be taken and plotted

3
Getting to the Simulation Window

• In order to simulate the design, the simulation
  window named Cadence Analog Design Environment
  needs to be opened
• To do this, go into the toolbar menu Tool-gt
  Analog Environment

4
Getting Variables

• The Variables that were used when adding the
  objects need to be added into the simulation
  variables
• This is done by selecting Variables -gt Copy From
  Cellview from the toolbar, this will pick all the
  variables in the schematic

5
Editing Variables - I

• Now the values of those variables need to be
  changed
• To change them select Variables -gt Edit from the
  toolbar, or click on the following side toolbar
  button

6
Editing Variables - II

• To change the values, type the value into the
  Value (Expr) field and click on Change
• Then select the Next variable from the table and
  continue
• Enter the following table of values, V1D and V3D
  
• need to be close to V4D value to prevent much
  of a voltage difference between the two

V4L 12.5
V4D 3000
V3L 0
V3D 2900
V2L 52.5
V2D 0
V1L 22
V1D 2900
mu0 50000
mu1 40000
LOAD 0
D1 400
D0 400
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Selecting Outputs

• In order to neatly see the results from the
  simulation, outputs are needed
• To select output, in the toolbar menu, go to
• Outputs -gt To Be Plotted -gt Select On
  Schematic
• This will open up the schematic window again

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Selecting the Pin

• In the Editor window, the values of wire that is
  selected will be plotted in a graph when the
  simulation is run
• So, select the conclt01gt output pin on the
  first detector and the conc_outlt01gt output pin
  on the second detector

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Output Plots

• When the conclt01gt pin is clicked a box pops up
  and when it is clicked again, conclt0gt and conclt1gt
  get highlighted, click OK, the two come under
  Outputs follow the same procedure for conc_out
  too

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Choosing the Analysis

• To select the simulation type, click on the
  Choose Analyses... button on the side toolbar

11
The DC Analysis

• In the Choosing Analyses window, select dc,
  Enabled, and Save DC Operating Point and click OK

12
The First Simulation

• Once all the values have been inputted, click on
  the toolbar menu Simulation-gtNetlist and Run on
  the toolbar menu or click the Netlist and Run
  button on the side toolbar

13
The Log File

• After this simulation has been run, a log file
  will appear
• This file is the results of the simulation and
  has some values that need to be inputted into the
  design

14
Edit the Properties

• Some properties of the injector need to be
  changed
• To do this go to Edit -gt Properties -gt Objects
  q

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Editing Properties

• Input the values from the log file of the
  currents and concentrations into the
  corresponding properties of the injector, i.e.,
• current 1 cur_I1 etc
• One change that needs to be done to the values is
  that they should all be inputted as positive
  numbers

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Another Analysis

• Another Analysis needs to be done, so go to the
  Choose Analyses Window again

17
Transient Simulation

• In the Choosing Analyses Window, Select tran
  and Enabled, then set the Stop Time to 1.5,
  check conservative, and click the Options...
  button

18
Editing the Transient Simulation

• In this window, Set the start field to 0, and set
  the values of the step and maxstep fields to
  .001
• Then click OK and get back to the simulation
  Window

19
Simulating

• Once all of the values are inputted, the only
  thing left to do is to simulate
• This can be done by clicking on the Netlist and
  Run on the side toolbar button
• This simulation may take a little longer than the
  previous one

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The Final Output

• After the Simulation finishes, a Waveform
  Window will appear with the desired plot on it
• This plot shows the outputs at the selected pin

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Understanding the plot

• Click on the Curves-gt Edit and we will be able to
  set some outputs to off and on to better
  understand the plot
• Increase the number of data points by going to
  Cadence Analog Environment window selecting
  Analysis in the side toolbar and clicking Options
  and changing the step and max step to get a more
  accurate plot
• Changing the voltages may increase or decrease
  the time the species tested need to approach the
  detector
• Change in the mobilities might separate or reduce
  the space between the two species

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Finishing up

• Now we will save the current state of the
  simulation
• Go to Session-gtSave State and save it as state2

23
Finishing up

• Now we can close all the open windows