INTRODUCTION

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INTRODUCTION Spice Excel

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INTRODUCTION. Spice Excel. SPICE. Simulation Program with Integrated Circuit Emphasis. SPICE is a program which can be used to simulate analog electronic circuits. v_in. circuit. v_out. - PowerPoint PPT Presentation

Transcript of INTRODUCTION

Page 1: INTRODUCTION

INTRODUCTION

Spice Excel

Page 2: INTRODUCTION

SPICE

Simulation Program with Integrated Circuit Emphasis

Page 3: INTRODUCTION

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

Page 4: INTRODUCTION

Analog filter circuits have a parameter called a ‘Transfer Function’ which maps

input to output with relation to frequency

v_in v_outcircuit

Page 5: INTRODUCTION

Analog filter circuits have a parameter called a ‘Transfer Function’ which maps

input to output with relation to frequency

Page 6: INTRODUCTION

Analog filter circuits have a parameter called a ‘Transfer Function’ which maps

input to output with relation to frequency

Page 7: INTRODUCTION

Analog filter circuits have a parameter called a ‘Transfer Function’ which maps

input to output with relation to frequency

Page 8: INTRODUCTION

Analog filter circuits have a parameter called a ‘Transfer Function’ which maps

input to output with relation to frequency

Page 9: INTRODUCTION

Analog filter circuits have a parameter called a ‘Transfer Function’ which maps

input to output with relation to frequency

Page 10: INTRODUCTION

A netlist is a text version of the circuit which describes the components and values for the

computer to interpret and solve

Page 11: INTRODUCTION

A netlist is a text version of the circuit which describes the components and values for the

computer to interpret and solve

Page 12: INTRODUCTION

A netlist is a text version of the circuit which describes the components and values for the

computer to interpret and solve

Page 13: INTRODUCTION

A netlist is a text version of the circuit which describes the components and values for the

computer to interpret and solve

Page 14: INTRODUCTION

A netlist is a text version of the circuit which describes the components and values for the

computer to interpret and solve

Page 15: INTRODUCTION

A netlist is a text version of the circuit which describes the components and values for the

computer to interpret and solve

Page 16: INTRODUCTION

A netlist is a text version of the circuit which describes the components and values for the

computer to interpret and solve

* Basic DC circuitV1 1 0 20R1 3 1 4kR2 3 2 10kV2 2 0 -10R3 3 0 8k.OP.END

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A netlist is a text version of the circuit which describes the components and values for the

computer to interpret and solve

* Series_RLC CircuitV1 1 0 SIN(0 5 1k) AC 1R1 2 1 50L1 2 3 100mHC1 3 0 1uF.AC DEC 100 1 10k.END

Page 18: INTRODUCTION

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

OptiSPICE is the best because it was written by your professor.

WHAT IS SPICE?

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• Create an Spice input file that describes the circuit

• Run Spice

• Inspect the output

WORKFLOW

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R_R1 1 0 100

C_C1 1 2 0.01592u

V_V1 2 0 dc 0.0 ac 1.0 sin(0.0 1.0 1.0 0 0)

node value

- A netlist describes the circuit to the program

- Node 0 is always GROUND

name

THE NETLIST

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-The title must be the first line in the netlist (in order to recognize the options command)- R1 = 100Ω (Ohms)- C1 = 0.01592uF (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 0.001 to 1e+06

Title “my filter circuit”.options ingold=2R_R1 1 0 100C_C1 1 2 0.01592u IC=0V_V1 2 0 dc 0.0 ac 1.0 sin(0.0 1.0 1.0 0 0).print ac V(1).ac LIN 100 0.001 1e+06.op.END

THE INPUT FILE

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Using PSPICE

• Create a netlist file using notepad (Make sure you have a .probe)

• Save as “.cir” file on desktop• Start up PSPICE• Open the file in PSPICE• Simulate “big green triangle”• Use trace to bring up the plot window and pick things

to show.

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Using PSpice

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• All Programs ->Tanner EDA -> T-Spice...

Other spices: likely won’t work

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VIEWING OUTPUT

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Using HSPICE

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Page 29: INTRODUCTION

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

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• 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.

Input Voltage

Output Voltage

BIPOLAR JUNCTION TRANSISTOR

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BJT

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OUTPUT FROM HSPICE

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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+12G : E+9

MEG : E+6K : E+3M : E-3U: E-3N: E-9P: E-12F: E-15

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• Components:

SOME USEFUL NETLIST STATEMENTS

Netlist Name Component Type Example

Rname ResistorRname N+ N- Value

Cname CapacitorCname N+ N- Value <IC=Initial Condition>

Lname InductorLname 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 MOSFETMname ND NG NS <NB> ModName <L=VAL> <W=VAL>Sweep Distributions:

- DEC : Log distributions of points- LIN: Linear distribution of points

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TIPS IN EXCEL

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• 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

FORMAT CELLS

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

Page 38: INTRODUCTION

• $ is used with cell coordinates, signifies leaving that coordinate constant

• Example: rearrange v=d/t to give d=v*t

The code

$

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• Other: transpose, add…

• 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 0.400 -1

-0.008 -0.008  

-0.007 -0.007  

Positive Negative

0.400 -0.400

-0.008 0.008

-0.007 0.007

PASTE SPECIAL

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

BEST FIT LINE

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• 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 0.999997109

R Square 0.999994218

Adjusted R Square 0.999991328

Standard Error 1182.326494

Observations 4

End

STATISTICS

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NOW TO APPLY YOUR KNOWLEDGE!


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