ec software experiments

8/3/2019 EC Software Experiments

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Electronic Circuits Software Experiments

How to use MultisimMultisim is the schematic capture and simulation application of National Instruments Circuit

Design Suite, a suite of EDA (Electronic Design Automation) tools. It is similar to PSpice, but itis more easy to use in practical sense and has lots of features to make circuit drawing/simulating,

a really simple task. Here is window of multisim, as it appears first time when the software isopened.

1. The Menu Bar is where you find commands for all functions.

2. The Design Toolbox lets you navigate through the different types of files in a project(schematics, PCBs, reports), view a schematics hierarchy and show or hide different layers.

3. The Component toolbar contains buttons that let you select components from the Multisim

databases for placement in your schematic.

4. The Standard toolbar contains buttons for commonly-performed functions such as Save,Print, Cut, and Paste.

5. The View toolbar contains buttons for modifying the way the screen is displayed.

6. The Simulation toolbar contains buttons for starting, stopping, and other simulation functions.


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7. The Main toolbar contains buttons for common Multisim functions.

8. The In Use List contains a list of all components used in the design.

9. The Instruments toolbar contains buttons for each instrument.10. Scroll Left right is to ensure ease in handling larger designs.

11. The Circuit Window (or workspace) is where you build your circuit.

12. Active tab indicates the current active circuit window.

Follow the steps:

1. Select StartAll Programs National Instruments Circuit Design Suite 11.0 Multisim

11.0 and ablank file opens on the workspace called Circuit1.

2. Select File Save As to display a standard Windows Save dialog.

3. Select Place Component to display the Select a Componentbrowser, navigate to the group

Sources and click on POWER_SOURCES. Then choose the Family: AC_POWER option.

The component appears as a ghost on the cursor. (Once you have selected the desired Groupand Family, start typing the components name in the browsers Component field. As you type,the string appears in the Searching field at the bottom of the browser.)

4. Move the cursor to the bottom-right of the workspace and left-click to place the component.

Similarly, find the other components and place them. When a part is on the workspace and youwant to place the same part again, highlight it and select EditCopy, then Edit Paste. You can

also select it from the In Use List and click to place it on the workspace. Press Ctrl+Rif you

want to rotate the component.The oscilloscope is obtained (by dragging it) from the componentwindow on the right hand side of main window.


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5. All components have pins that you use to wire them to other components or instruments. Assoon as your cursor is over a pin, Multisim knows you want to wire and the pointer changes to a

crosshair. You can also use ctrl + q for wiring the circuit. Dont forget to add Ground to the

circuit (available in Sources option in Place>>Component).


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6. Choose the type of analysis you want to perform by clicking Simulate>> Analyses>>. Here,

we have chosen transient analysis.

7. Select Simulate AnalysesTransient Analysis and click on the Output tab. Add I(v1) to the

right column by first clicking on I(v1) in left column and then pressing Add tab.


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8. Also choose the time (from transient Frequency parameters).9. Click on Simulate tab. The output window appears which consists of tab for oscillator ouput as

well as transient waveforms. Different colored waves can be viewed by choosing the color ofrespective wire of the electrical quantity (voltage and current). Right click on wire in the circuit

and then click on Color segment to choose the color of wire and thus the waveform color

(after simulation).


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Experiment No.- 1.b

Aim - To build and simulate the circuits of positive clipper, negative clipper (series and

shunt type), and double ended clipper, positive clamper and negative clamper using diodes.

POSITIVE CLIPPER(shunt type)

Design

Vo=Vref + V To get Vo=2V, V =0.4V for 1N4007GP diodeVref= Vo- V

Vref=2-0.4=1.6 V

Procedure -

I) Place components-

a. Sources-> signal voltage sources-> AC voltage->ok and placeb. Basic->resistors->type 3.3K in component tab->ok and place

c. Diodes-> types 1N4007GP in component tab->ok and place

d. Sources-> power sources-> DC voltage->ok and place

e. Sources-> power sources-> ground->ok and place

Vin4 Vpk

1kHz

0

D11N4007

R1

3.3k

Vref1.6 V

1 2

II) Wire all the components as shown in the circuit.

III) Set input parameters

a. Double click AC voltage source-> in value menu

voltage(pk)= 4 (to get 8V peak to peak)

frequency= 1KHz

select label menu-> give refdes : Vin -> click ok

b. Double click DC voltage source-> in value menu

voltage = 1.6

select label menu-> give refdes : Vref -> click ok


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c. Set net name for input and output

IV) Simulate-

a. Select simulate menu-> Analyses->Transient analysis-> Reset to default

Start time : 0

End time : 0.005

b. select output menu-> type circuit voltage in variables in circuit tab

select voltage one by one depending upon the net name in circuit and add

c. Simulate

v) Verify the output waveform depending upon designed values and save the waveform.

NEGATIVE CLIPPER(shunt type)

Design:

Vo=Vref +V To get Vo= -2V, V = -0.4V since diode in reverse directionVref= Vo-V

Vref= (-2) - (-0.4)= -1.6 V

Procedure:


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Same as positve clipper above except connect diode and Vref as below.

R1

3.3k

Vin

4 Vpk

1kHz

0V11.6 V

1

1N4007

D1

2

POSITIVE CLIPPER(series type)


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Procedure:

Same as positve clipper above except connect diode, resistor and Vref as below.

Vr2

Vin

4 Vpk

1kHz

0

R13.3

D1

1N4007GP

21

NEGATIVE CLIPPER(series type)


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Procedure:

Same as positve clipper above except connect diode, resistor and Vref as below.

R13.3k

Vin

4 Vpk

1kHz

0

V12

D1

1N4007GP

1 2

DOUBLE ENDED CLIPPER

Design:

a. For positive clipping, Vo=Vref + V


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To get Vo= 2V, V = 0.4V

Vref= Vo-V

Vref= 2 - 0.4= 1.6 V

b. For negative clipping , Vo=Vref +V

To get Vo= -3V, V = -0.4V since diode in reverse direction

Vref= Vo-V

Vref= (-3) - (-0.4) = -2.6 V

Procedure:

Same as positve clipper above except connect diodes, resistor, Vref1and Vref2 as below.

D11N4007GP

D21N4007

R1

3.3k

Vref1

1.6 V

Vref22.6 V

Vin

4 Vpk

1kHz

0

1 2


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POSITIVE CLAMPER

Procedure:


a. Sources-> signal voltage sources-> Pulse voltage->ok and place

b. Basic->resistors->type 110K in component tab->ok and placec. Diodes-> types 1N4007GP in component tab->ok and place

d. Sources-> power sources-> DC voltage->ok and place

e. Sources-> power sources-> ground->ok and place




initial value= -4

pulsed value= 4 (to get 8V peak to peak square wave)

pulse width= 0.5 msec

period= 1 msec (to get 1 KHz freq)



voltage = 1.6


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IV) Simulate-


Start time : 0

End time : 0.005



c. Simulate


D11N4007GP

R110

C1

0.1F

Vref1.6 V

V3

-4 V 4 V

0.5msec 1msec

1 2


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NEGATIVE CLAMPER

Procedure:

Same as positve clamper above except connect diode and Vref as below.


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D11N4007GP

R1

110

C1

0.1F

Vref1.6 V

Vin

-4 V 4 V

0.5msec 1msec

1 2

Experiment No.- 2.b

Aim - To design and build the Common Emitter amplifier circuit using simulation and

determine the voltage gain for two different values of supply voltage and for two different

values of emitter resistance.

Design Same as 2.a. experiment (analog experiment)


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Procedure


a. Sources-> signal voltage sources-> AC voltage->ok and place

b. Basic->resistors->

place R1, R2, R3, R4 and R5 of the designed values->ok and place

c. Transistor->BJT_ NPN->type 2N222->ok and place

d. Basic -> Capacitors-> place C1, C2 and C3 of designed values-> ok and place

e. Sources-> power sources-> Vcc->ok and place

f. Sources-> power sources-> ground->ok and place

Vin

15mVpk

1kHz

0

VCC10V

R110k

R247k

R32.2k

R5470

C1

0.1F

C2

0.1F

C3100F

Q1

2N2222A1_1 1

2_1




voltage(pk)= 15mV (to get 30mV peak to peak)

frequency= 1KHz


b. Double click Vcc voltage source-> in value menu

voltage = 10


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IV) Simulate-

a. Select simulate menu-> Analyses->AC analysis-> Reset to default

Start Freq : 10Hz

End Freq : 1GHz

Sweep type: decade

Vertical scale: decibel



c. Simulate


a. With Re= 470 and Vcc=10V, Av(db)=__________________

b. With Re= 300 and Vcc=12V, Av(db)= ____________________

Experiment No.- 3.b

Aim To design and build CMOS inverter using simulation and verify its truth table.


a. Sources-> signal voltage sources-> Pulse voltage->ok and place


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b. Basic->resistors->type 100K in component tab->ok and place

c. Transistors-> MOS_3TEN (MOSFET 3 terminal enhancement N channel type)

-> type 2N7000 in component tab->ok and place

d. Transistors-> MOS_3TEP (MOSFET 3 terminal enhancement P channel type)

-> type BST100 in component tab->ok and place

e. Sources-> power sources-> DC voltage->ok and place


Q1

2N7000

R1100k

V2

5 V

V1

5 V 0 V

0.5msec 1msec

Q2BST100

11_1

II) Wire all the components carefully as shown in the circuit.



initial value= 0

pulsed value= 5 (to get 5V square pulse wave)


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pulse width= 0.5 msec

period= 1 msec (to get 1 KHz freq)



voltage = 5



IV) Simulate-


Start time : 0

End time : 0.005



c. Simulate


TRUTH TABLE of NOT (INVERTER)

INPUT OUTPUT

HIGH LOW

LOW HIGH


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Experiment No.- 4.b

Aim Design and implement a Schmitt trigger using Op-Amp using a simulation package

for two sets of UTP and LTP values and demostrate its working.

Design Same as 4.a (analog experiment)

Procedure

I) Place components-a. Sources-> signal voltage sources-> AC voltage->ok and place

b. Basic->resistors->

place R1, R2 of the designed values->ok and place

c. Analog->OPAMP->type 741->ok and place

d. Sources-> power sources-> DC voltage ->ok and place


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do the same for Vee and Vref


Vee

12 V

Vcc

12 V

Vref

R210k

R1110

U1

741

3

2

4

7

6

51

4

V1

5 Vpk

1kHz

0

1




voltage(pk)= 5V (to get 10V peak to peak)

frequency= 1KHz


b. Double click Vcc voltage source-> in value menu

voltage = 12

select label menu-> give refdes : Vcc -> click ok

Do the same for Vee and Vref with proper values


IV) Simulate-


Start time : 0

End time : 0.005



c. Simulate



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a. UTP=4V and LTP=2V

b. UTP=3V and LTP=1V


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Experiment No.- 5.b


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Aim Design and implement a OP-Amp relaxation oscillator using a simulation package

and demonstrate the change in frequency when all resistor values are doubled.

Design

Same as 5.a (analog experiment)

Procedure


a. Basic->resistors->

place R1, R of the designed values->ok and place

b. Basic -> Capacitors-> place C of designed values-> ok and place

c. Analog->OPAMP->type 741->ok and place

d. Sources-> power sources-> DC voltage ->ok and place

do the same for V2

e. Basic->potentiometer-> select 10k_lin->ok and place


U1

741

3

2

4

7

6

51

R

R1

10k

R210k

Key=A

50%

C1

V1

12 V

V2

12 V

3



a. Double click Vcc voltage source-> in value menu


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voltage = 12

Select label menu-> give refdes : Vee -> click ok

Do the same for Vee with proper values

b. Set net name for input and output

IV) Simulate-


Start time : 0

End time : 0.02



c. Simulate


Note: To get designed frequency change R2 potentiometer percentage bar

a. For design value of resistor,

f=________________

b. For doulbed the value of resistor,

f=________________


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