ELC 106.2 Student Manual Rev 4

8/13/2019 ELC 106.2 Student Manual Rev 4

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Outline of the Laboratory Exercise in Circuits II

Laboratory Activity 1: Second Order Circuits (simulation*)To become familiar with the second order circuit and the different tyes of natural

resonse associated with it!

Laboratory Activity ": Second Order Circuits: #LC (simulation*)

To become familiar with the #LC series circuit and the different tyes of natural resonse

associated with it!

Laboratory Activity $: %arallel #LC Circuit & (simulation*)

To become familiar with the arallel #LC circuit and the different tyes of natural


Laboratory Activity ': Comlete #esonse of Second Order Circuits

To study the comlete resonse of second order circuits!

Laboratory Activity : %arallel #LC Circuit &&

To become familiar with actual comonents used in arallel #LC circuit and the differenttyes of natural resonse associated with it!

Laboratory Activity : #C ilter Circuit &

To become familiar with an #C lowass filter circuit!

Laboratory Activity +: #C ilter Circuit &&

To become familiar with an #C hi,hass filter circuit!

Laboratory Activity -: #C ilter Circuit &&&To become familiar with an #C bandass filter circuit!

Laboratory Activity .: #C &nte,rator CircuitTo study an #C inte,rator circuit!

Laboratory Activity 1/: #0S olta,e

To study the #0S values of different volta,e waveforms!

Laboratory Activity 11: ilter Circuit %roblem

To aly the 2nowled,e of an #C filter circuit to a roblem

Laboratory Activity 1": ilter Circuit %roblem "

To aly the 2nowled,e of transfer function to a roblem!

Laboratory Activity 1$: Transformer &To study the roerties of a transformer!!

%ro3ect4

*simulation: if comuters are not available5 start with laboratory activity ' and as2 the students to do labs 1 to $ one

,rou at a time usin, the comuter in the laboratory while the rest are doin, lab ' onwards!

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Laboratory Activity 1

Second Order Circuits

A! Aim

To become familiar with the second order circuit and the different tyes of natural


6! The Second Order Circuit

7sin, the electronic LTSice&5 construct the circuit shown in i,! 1 below!

i,! 1 Series #LC Circuit

Clic2 8Simulate9 and then clic2 8dit Simulation Command9! nter at 8Sto Time9 bo; and

ut a chec2 the bo; for 8Start e;ternal


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the terminal of caacitor above ,round! Once it touches the wire5 a volta,e robe will aear!

Clic2 the left button and observe the lot ,enerated!

Observe the volta,e5 (n//$) across the "/ m caacitor! The label n//$ refers to the node

number of the wire connection! Then move the robe until it touches the caacitor device! A

current robe will aear with red arrow showin, the direction of the current! Then left clic2 themouse button! The current across the caacitor will be lotted with the current a;is dislayed at

the ri,ht hand corner!

i, $! Si,nal %lots for Circuit in i,! 1

Clic2 the 8iew9 menu and select and clic2 8Sice =etlist9! >ou will see in o u window thete;t in column 1 Table 1! Column " e;lains the meanin,!

Table 1

Pop Up

Spice NetList

Explanation

V1 N001 0 9

R1 N002 N001 5

C1 N003 0 200m

L1 N002 N003 1

.tan 20 stat!p

.bac"anno

.en#

V1 is t$e so!ce %olta&e connecte# to &o!n# no#e 0 an#

'ie no#e N001. T$e n!mbe 9 is t$e %al!e o( %olta&e

R1 is t$e esisto connecte# bet'een no#e N001 an# N002

'it$ 5 o$ms %al!e

C1 is connecte# bet'een noo#es N003 an# 0 'it$ %al!e o( 200

mille (aa#s

L1 is connecte# bet'een no#es N002 an# N003 'it$ %al!e o( 1

$en)

.tan is a tansient sim!lation comman# t$at last (o 20

secs.

See LTSpice $elp (o (!t$e #etails

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C! Tools and ?uiment

1! %ersonal Comuter"! LTSice &

$! Scilab !"

1! @enerate the "ndorder ordinary linear differential e?uations (O


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c! 7sin, Scilab for tDE/:!:"/F5 %lot (n//$)!

d! Comare it with your simulation lot!

e! Hhat is the natural fre?uencyGf! #esonant fre?uencyG

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Laboratory Activity 2

Second Order Circuits: RLC

A! Aim

To become familiar with the Source ree#LC series circuit and the different tyes of

natural resonse associated with it!

The #LC Series Circuit

i, "!1 Source ree #LC Circuit

Construct the circuit in i, "!1 in LTSice&! iew your sice netlist! &t should be identical to

the one shown in i, "!"


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i, "!" =etSice List of the circuit in i,! "!1

#un the simulation and view the waveforms of (n//)5 (n//$)! Then double clic2 on

(n//') to clear and lot (n//') only and then sin,le clic2 (n//) to lot it in suerosition!&t should aear similar to i, "!$

S1 switched on for 1/ ms and turned off afterwards! This is to char,e caacitor C1 for 1/ ms!Then S" turned on after an interval of "/ ms! Another 1/ ms interval when both switch S1 and

S" were oened ensured isolation of #LC from suly volta,e 1!

6! Activities

1! #elace # with "// ohms and show the (n//) and (n//$) waveform! Try # D //5125 and 1/2!

"! Hrite the differential e?uation in term of IirchoffJs olta,e Law!


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'!


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Laboratory Activity

Second Order Circuits: RLC

a! Aim

To become familiar with the Source ree#LC arallel circuit and the different tyes of

natural resonse associated with it!

6! The #LC %arallel Circuit

i, $!1 Source ree #LC Circuit

Construct the circuit in i, $!1 in LTSice&! L1D1 K5 C1D!"/ 5 #D15 1D"5 &1D$! Study the

switches timin,s and the volta,e and current sources! =ote that sources are time defined! #un

the simulation and lot the (n//$) node! &t should loo2 the same as i,! $!"

i, $!" LTSice %lot of (n//$) and &(L1)

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b! Activities

1! #elace the time define current source with $ A constant source and observe the chan,esin the lot! ;lain what haened!

i, $!$ LTSice %lot of (n//$) and &(L1) with constant current source of $A

;lanation: The LTSice emloys ideal current source! Kence5 even if the switch is oen5 the

current is still forced throu,h the inductor! Kence inductor current remain constant after a lon,

eriod of tiem! #estore the current source ori,inal confi,uration!

"!


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Com#lete Res#onse of Second Order Circuits

S$ECIAL AC%I&I%': LA(ORA%OR' RE$OR%

After answerin, the usual e;ercises and ?uestions in Laboratory Activity '5 you arere?uired to submit a Laboratory #eort! ollow the laboratory reort ,uidelines!

A! Aim

To study the comlete resonse of second order circuits!

6! %he Second Order Circuit

Construct the circuit shown in i, '!1 in LTSice& simulation software!

i,! '!1 LTSice& Circuit Confi,uration

#un the simulation circuit in i, '!1 for / ms! %robe (n//1) node5 the outut of

LT1//1 Oerational amlifier! 1D*sin("///*t)

1


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i, '!" LTSice& lot of (n//1)

C! %reliminary Activities

1! The ?uivalent circuit of O Am in i, '!1 is shown in i,! '!"! ary the ,ain @ and

see what haen to the outut n//1!

"! 7sin, Lalace Transform solve for the articular solution of (n//1)! %lot in Scilab

(n//1) for tDE/:!!/1:F*1d$! Hhy is it the fre?uency is about $1- K!

$! #elace 1 with constant v source! #un the LTSice& simulaton and obtain the lot

for (n//1)! 7sin, Lalace Transform solve for the articular solutin of (n//1)! %lot inScilabe (n//1) and chec2 if you have the same lot with LTSice!

i, '!$ ?uivalent Circuit of O Am in i,! '!1

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Construct the second order circuit shown above in abreadboard! The 1 u caacitor is an electrolytic caacitor

(uniolar) so ma2e sure that the 1 u caacitorJs ne,ative

terminal is connected to ,round! or the /!1" 5 use two/!" caacitors or /!1" caacitor! or the OAm5

M D M1" and D 1" ! 7se O% A0% +'1 with in

Connection shown in i,! '!'

Set the function ,enerator to simulate cos ("///t)5 s2etch

the inut (s) and outut (out) volta,es in Table '!1!


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inally5 set the function ,enerator to outut a s?uare wave with fre?uency of 1// 2K! S2etch the

inut (s) and ouut (out) volta,es in Table '!'!


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%able "!"

) * S+etch of &s and &out,

(')


%able "!-


()


1


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1


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Laboratory Activity -

Current Sources Circuit

A! Aim

To become familiar with current sources circuit throu,h simulation and actual circuit

e;eriment!

%he Current Sources

i, !1 Constant Current Sources

Construct the circuit in your LTSice& simulation as shown in i,! !1! #un the simulation and

note the volta,e (n//") and current &1! #un the simulation for values of #1D 15 1//5 125 1/25and 1//2! Hhat do you observeG

Construct the circuit in your LTs-ice& simulation as shown in i,! !"! stimate the ma;imumvalue of #1 wherein the circuit continues to oerate as constant current ,enerator!

The circuit in i,! !$ is a revision of the circuit in i,! !"! Construct it! &t made use of currentmirror! ind out how current mirror oerate!


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i, !$ &mrovement over circuit in i,! !" usin, current mirror

C! Laboratory Exercise $ro#er

Construct the circuit in i,! !'! Set your si,nal ,enerator as shown! &t should ,enerate s?uare

waves at 1 2h! 7sin, an oscilloscoe5 measure (n//')!

i, !' Constant Current @enerator Alied on Caacitor

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S2etch the waveform of (n//') in Table !1! stimate the sloe of the curve!

%able -!1

) * S+etch of &)n.."*

(1)

Chan,e the fre?uency of si,nal ,enerator to " 2h! S2etch the waveform in Table !" andestimate the sloe!

%able -!2

) * S+etch of &)n.."*

(1)

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#elace the caacitor with /!/ uf! Set the si,nal ,enerator fre?uency bac2 to 12h! S2etch the

(n//') in Table !$! stimate the sloe of the curve

%able -!

) * S+etch of &)n.."*

(1)

Chan,e the fre?uency to " 2h! S2etch the curve in Table !'! stimate the sloe!

%able -!") * S+etch of &)n.."*

(1)

"


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Hrite the O


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#eference:

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Documents

ELC 106.2 Student Manual Rev 4