1. Introduction to Tanner EDA T-Spice
Eitan Shapira

2. Introduction to Tanner EDA T-Spice
SPICE – Simulation Program with Integrated Circuit Emphasis
Spice was originally developed in Berkley university at the 60’s
The Spice language is universal
Provides the engineer with a great analysis ability
Introduction to Tanner EDA T-Spice
Eitan Shapira

3. Introduction to Tanner EDA T-Spice
How does it work?
Spice is a program that collects from the user the circuit defining parameters via a code and analyze the circuit using its preloaded equations defining each component in the circuit.
The code that describes the circuit called Netlist
For Example:
Introduction to Tanner EDA T-Spice
Eitan Shapira

4. Introduction to Tanner EDA T-Spice
Example
Consider the following RC circuit:
You must plot the Bode diagram of both HP and LP signals meaning VLP(f)/VIN(f) and VHP(f)/VIN(f)
Introduction to Tanner EDA T-Spice
Eitan Shapira

5. Introduction to Tanner EDA T-Spice
Solution: 2 1
GND
1. Mark the different nodes in relevant names
2. Start writing the Spice code
Introduction to Tanner EDA T-Spice
Eitan Shapira

6. Introduction to Tanner EDA T-Spice
Spice code for this example:
And the result…
Introduction to Tanner EDA T-Spice
Eitan Shapira

7. Introduction to Tanner EDA T-Spice
Ok, but what if we don’t remember the Spice syntax???
Is it impossible for us to perform a simulation in Spice?
Not at all!!!
Tanner T-Spice is equipped with a button just for this case: The insert command button
Introduction to Tanner EDA T-Spice
Eitan Shapira

8. Introduction to Tanner EDA T-Spice
The Insert Command Wizard:
Options Menu
Dynamic screen
Introduction to Tanner EDA T-Spice
Eitan Shapira

9. Introduction to Tanner EDA T-Spice
For example let’s assume that we forgot how print our results
Add relevant data
Choose Output and press AC results
Introduction to Tanner EDA T-Spice
Eitan Shapira

10. Introduction to Tanner EDA T-Spice
Example 2: Consider the CMOS inverter:
Calculate tPLH, tPHL, tPD, tr, tf
Introduction to Tanner EDA T-Spice
Eitan Shapira

11. Introduction to Tanner EDA T-Spice
Solution: in order to find all these we will set up a pulse in the time domain and perform measurements accordingly and then we could ether conclude the parameters from the output plot or use Spice .MEASURE command
Spice circuit (Code):
Introduction to Tanner EDA T-Spice
Eitan Shapira

12. Introduction to Tanner EDA T-Spice
Now for the measurements and simulation:
The results:
Introduction to Tanner EDA T-Spice
Eitan Shapira

13. Introduction to Tanner EDA T-Spice
View the result via W-Edit:
Introduction to Tanner EDA T-Spice
Eitan Shapira

14. Introduction to Tanner EDA T-Spice
Conclusions:
T-Spice is a very powerful tool
The integrity of the result relies only on the designer – Spice can not know what is it you would like to find, it is after all a machine
Memorizing the entire syntax is not an easy task at all
The absence of the circuit view is very confusing when the circuit is very complicated
Introduction to Tanner EDA T-Spice
Eitan Shapira

15. Introduction to Tanner EDA T-Spice
Thank You
Introduction to Tanner EDA T-Spice
Eitan Shapira