1. INTRODUCTION
Spice Excel

2. Simulation Program with Integrated Circuit Emphasis
SPICE
Simulation Program with Integrated Circuit Emphasis

3. SPICE is a program which can be used to simulate analog electronic circuits

4. Analog filter circuits have a parameter called a ‘Transfer Function’ which maps input to output with relation to frequency
v_in
circuit
v_out

5. Analog filter circuits have a parameter called a ‘Transfer Function’ which maps input to output with relation to frequency

6. Analog filter circuits have a parameter called a ‘Transfer Function’ which maps input to output with relation to frequency

7. Analog filter circuits have a parameter called a ‘Transfer Function’ which maps input to output with relation to frequency

8. Analog filter circuits have a parameter called a ‘Transfer Function’ which maps input to output with relation to frequency

9. Analog filter circuits have a parameter called a ‘Transfer Function’ which maps input to output with relation to frequency

10. A netlist is a text version of the circuit which describes the components and values for the computer to interpret and solve

11. A netlist is a text version of the circuit which describes the components and values for the computer to interpret and solve

12. A netlist is a text version of the circuit which describes the components and values for the computer to interpret and solve

13. A netlist is a text version of the circuit which describes the components and values for the computer to interpret and solve

14. A netlist is a text version of the circuit which describes the components and values for the computer to interpret and solve

15. A netlist is a text version of the circuit which describes the components and values for the computer to interpret and solve

16. A netlist is a text version of the circuit which describes the components and values for the computer to interpret and solve
* Basic DC circuit V
R k
R k V
R k
.OP
.END

17. A netlist is a text version of the circuit which describes the components and values for the computer to interpret and solve
* Series_RLC Circuit
V1 1 0 SIN(0 5 1k) AC 1 R
L mH
C uF
.AC DEC k
.END

18. WHAT IS SPICE?
Spice is a software program that simulates electronic circuits and outputs the circuits’ basic characteristics such as:
Voltage
Current
Resistance
at any location in the circuit
HSpice is a version used in Unix
PSpice is a version used in Windows
T-Spice simpler tool meant for smaller circuits – this is what you will use in the lab
LT spice is free
OptiSPICE is the best because it was written by your professor.

19. WORKFLOW Create an Spice input file that describes the circuit
Run Spice
Inspect the output

20. THE NETLIST - A netlist describes the circuit to the program
- Node 0 is always GROUND
node
name
value
R_R
C_C u
V_V dc ac 1.0 sin( )

21. THE INPUT FILE Title “my filter circuit” .options ingold=2
R_R C_C u IC=0 V_V1 2 0 dc 0.0 ac 1.0 sin( )
.print ac V(1)
.ac LIN e+06
.op
.END
The title must be the first line in the netlist
(in order to recognize the options command)
- R1 = 100Ω (Ohms)
- C1 = uF (micro Farads) with initial condition of 0
- V1 = sine wave with 1Hz frequency, 0 to 1V magnitude
- Print ac voltage at node 1
- Want 100 frequency points from to 1e+06

22. LTSpice – demo later

23. Others might be available
Hspice (not likely and difficult to use)
Instructions likely obsolete
PSpice
Not sure we have full licence
Tspice
Might be ok – netlist based I think.
OptiSpice – the best (it’s mine).

24. RUN T-SPICE
All Programs ->Tanner EDA -> T-Spice...

25. VIEWING OUTPUT

26. Using PSpice

27. Using HSPICE

30. For HSPICE and PSPICE use Excel to generate the plots
TRANSFER FUNCTION
Magnitude Plot - DB vs Hz (log scale)
Phase Plot - Degrees vs Hz
Together these plots show the transfer function of the circuit at different frequencies
For HSPICE and PSPICE use Excel to generate the plots

31. BIPOLAR JUNCTION TRANSISTOR
Input Voltage
Output Voltage
3-terminals: Collector, Base, and Emitter
Common Emitter Amplifier
input = base with respect to the emitter
output = collector with respect to the emitter
Most commonly used configuration for transistor-based amplifiers as it produces the highest voltage, current, and power gain.

32. BJT

33. OUTPUT FROM HSPICE

34. SOME USEFUL NETLIST STATEMENTS
Analysis Types:
Operating Point (.OC) - Voltage at each node and current from voltage sources
AC Analysis (.AC) - Small signal model output at different frequencies
Transient (.TRAN) - Circuit output as time passes
Scale factors:
T : E+12
G : E+9
MEG : E+6
K : E+3
M : E-3
U: E-3
N: E-9
P: E-12
F: E-15

35. SOME USEFUL NETLIST STATEMENTS
Components:
SOME USEFUL NETLIST STATEMENTS
Netlist Name
Component Type
Example
Rname
Resistor
Rname N+ N- Value
Cname
Capacitor
Cname N+ N- Value <IC=Initial Condition>
Lname
Inductor
Lname N+ N- Value <IC=Initial Condition>
Vname
Voltage Source
Voltage source: Vname N+ N- <DC=> DCValue
Iname
Current Source
Current source: Iname N+ N- <DC=> DCValue
Qname
Bipolar Transistor
Qname C B E BJT_modelName
Mname
MOSFET
Mname ND NG NS <NB> ModName <L=VAL> <W=VAL>
Sweep Distributions:
- DEC : Log distributions of points
- LIN: Linear distribution of points

36. LTSpice - demo

37. TIPS IN EXCEL

38. Scientific Notation: 0 decimals
FORMAT CELLS
In the menu, choose Format Cells
Time [s]
Vout [V]
0.E+00
0.000
1.E-10
-0.008
2.E-10
-0.007
3.E-10
0.034
4.E-10
0.140
5.E-10
0.322
6.E-10
0.588
7.E-10
0.934
8.E-10
1.355
9.E-10
1.839
1.E-09
2.373
Scientific Notation: 0 decimals
Number: 3 decimals

39. Excel can split text from one column into multiple columns using the command “Text to Columns”

40. $
$ is used with cell coordinates, signifies leaving that coordinate constant
Example: rearrange v=d/t to give d=v*t
The code

41. PASTE SPECIAL Example: Make a row of data negative
Copy cell with -1 value, highlight cells that you want to become negative of the current values, Edit Paste Special Multiply
Positive
“not yet Negative”
0.400 -1
-0.008
-0.007
Positive
Negative
0.400
-0.400
-0.008
0.008
-0.007
0.007
Other: transpose, add…

42. BEST FIT LINE
Right-click on a data point, choose Add Trendline using type: Linear, options: display equation on chart and R squared value.

43. Regression Statistics
must have the Analysis Toolpak (go to Tools Add-ins, and install).
tools - data analysis - regression - x and y ranges - click residuals
SUMMARY OUTPUT
Regression Statistics
Multiple R
R Square
Adjusted R Square
Standard Error
Observations 4
End

44. NOW TO APPLY YOUR KNOWLEDGE!