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7/28/2019 ECAD2 Complete Manual
1/37
S.E. SEM IV (BIOMEDICAL): ELECTRONIC CIRCUIT ANALYSIS AND
DESIGN-II
Date:
EXPERIMENT NO: - 1
_______________________________________________________________________
AIM: TO MEASURE THE Op-AmprPARAMETERS
a. Slew rateb. Input Bias currentc. Input and output offset Voltage
APPARATUS: Bread Board, CRO, Function Generator, Dual power supply, multimeter.
COMPONENTS: Connecting wires, resistors: 1K,1M, 10K, 100K, LM741
,IC,0.1F,0.001 F
PROCEDURE:
a. Slew rate Connect the circuit as shown in figure. Give square wave input having amplitude 1Vp-p and vary the frequency from
low to high. At each frequency observe the output square wave and note down amplitude
and frequency of output waveform . Calculate the slew rate.
PIN DIAGRAM OF OP-AMPrIC-:
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S.E. SEM IV (BIOMEDICAL): ELECTRONIC CIRCUIT ANALYSIS AND
DESIGN-II
CIRCUIT DIAGRAM:
OBSERVATION TABLE:
Sr. No Frequency(Hz) X-axis Vt Y- axis Vd
1. 2k2. 30k3. 100k
b. Input Bias current Connect the circuit to measure input current of inverting input Noninverting terminal is grounded The inverting terminal is at virtual ground and we have ( IoRf)=VO Measure VO and calculate IB Now connect the circuit to measure input current of non-inverting input inverting terminal is grounded through Rf VO = ( IB.Rf ) So measure VO and IB
c. Input Offset Current:
Iio=IB1-IB2
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S.E. SEM IV (BIOMEDICAL): ELECTRONIC CIRCUIT ANALYSIS AND
DESIGN-II
CIRCUIT DIAGRAM:
0.01F
+Vcc
-VEE
1M
V0
-
+
+Vcc
-VEE
V0
-
+
1M 0.1F
CALCULATION:IB1= VO1/ Rf
IB2= VO2/ RfIB= IB1+ IB2
d. Input and Output Offset Voltage
Connect the circuit as shown in figure Ground the both input terminal Measure the output offset voltage using voltmeter Calculate input offset voltage
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S.E. SEM IV (BIOMEDICAL): ELECTRONIC CIRCUIT ANALYSIS AND
DESIGN-II
CIRCUIT DIAGRAM:
+Vcc
-VEE
V0
-
+
100K
1K
CALCULATION:
Output Offset Voltage VO =_________________mVInput Offset Voltage Vio = VO .R2/ (R1+R2)
CONCLUSION:
Questions:
Q1. Define slew rate and explain the significance of large value of slew rate.
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S.E. SEM IV (BIOMEDICAL): ELECTRONIC CIRCUIT ANALYSIS AND
DESIGN-II
Q.2 A 10Khz square wave is to be amplified by an op-amp to have an output
voltage swing 10V. Two op-amps are1) uA741 having S.R. of 0.5V/us &
2) TL081 with a S.R. of 13V/us. Determine the stability of op-amp.
Q.3 List out the ideal and practical specification for op-amp 741?
References:
Date: Grade: Faculty Incharge:
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S.E. SEM IV (BIOMEDICAL): ELECTRONIC CIRCUIT ANALYSIS AND
DESIGN-II
EXPERIMENT NO: - 2
_______________________________________________________________________
AIM: TO STUDY DIFFERENT APPLICATION OF OPERATIONAL AMPLIFIER
a. Inverting Amplifierb. Non-Inverting Amplifierc. Voltage follower
APPARATUS REQUIRED: function generator, CRO, Dual power supply
COMPONENTS: Connecting wires, resistors: 1K, 10K, LM741 IC, Bread Board,
Connecting wires and probes.
a .Inverting Amplifier
THEORY:
The input signal Vi is applied to the inverting input terminal through R1 and the non-
inverting input terminal of the op-amp is grounded. The output voltage Vo is fed back to
the inverting input terminal through the Rf- R1network, where Rf is the feedback resistor.
The output voltage is given as,
Vo = - ACL Vi
Here the negative sign indicates that the output voltage is 1800
out of phase with the input
signal.
PROCEDURE:
Connections are given as per the circuit diagram. + Vcc and - Vcc supply is given to the power supply terminal of the Op-Amp IC. By adjusting the amplitude and frequency knobs of the function generator,
appropriate input voltage is applied to the inverting input terminal of the Op-Amp.
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S.E. SEM IV (BIOMEDICAL): ELECTRONIC CIRCUIT ANALYSIS AND
DESIGN-II
The output voltage is obtained in the CRO and the input and output voltagewaveforms are plotted in a graph sheet.
CIRCUIT DIAGRAM OF INVERTING AMPLIFIER: Rin=1k, Rf=10k
+Vcc
-VEE
V0
-
+
!
20mV
1KHZ
10K
1K
AC
OBSERVATIONS:
A=-Rf/R1
Sr. No Vin Vo(theoretical) Vo(practical)
1.2.3.4.5.
b. NON - INVERTING AMPLIFIER:
THEORY:
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S.E. SEM IV (BIOMEDICAL): ELECTRONIC CIRCUIT ANALYSIS AND
DESIGN-II
The input signal Vi is applied to the non - inverting input terminal of the op-amp. This
circuit amplifies the signal without inverting the input signal. It is also called negativefeedback system since the output is feedback to the inverting input terminals. The
differential voltage Vd at the inverting input terminal of the op-amp is zero ideally and the
output voltage is given as,
Vo = ACL Vi
Here the output voltage is in phase with the input signal.
PROCEDURE:
Connections are given as per the circuit diagram.
+ Vcc and - Vcc supply is given to the power supply terminal of the Op-Amp IC. By adjusting the amplitude and frequency knobs of the function generator,
appropriate input voltage is applied to the non - inverting input terminal of the Op-
Amp.
The output voltage is obtained in the CRO and the input and output voltagewaveforms are plotted in a graph sheet.
CIRCUIT DIAGRAM OF NON INVERITNG AMPLIFIER: R1=1k, R2=10k
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S.E. SEM IV (BIOMEDICAL): ELECTRONIC CIRCUIT ANALYSIS AND
DESIGN-II
+Vcc
-VEE
V0
-
+
!
20mV
1KHZ
10K
1K
OBSERVATIONS:A=1+(R2/R1)
Sr. No Vin Vo(theoretical) Vo(practical)
1.2.3.4.5.
c. VOLTAGE FOLLOWER:PROCEDURE:
Connections are given as per the circuit diagram. + Vcc and - Vcc supply is given to the power supply terminal of the Op-Amp IC. By adjusting the amplitude and frequency knobs of the function generator,
appropriate input voltage is applied to the non - inverting input terminal of the Op-
Amp.
The output voltage is obtained in the CRO and the input and output voltagewaveforms are plotted in a graph sheet.
CIRCUIT DIAGRAM:
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S.E. SEM IV (BIOMEDICAL): ELECTRONIC CIRCUIT ANALYSIS AND
DESIGN-II
OBSERVATIONS:
A=1
Sr. No Vin Vo(theoretical) Vo(practical)
1.2.3.4.5.CONCLUSION:
Questions:
Q.1 Explain applications of voltage follower.
Q.2 Differentiate NINV & INV configuration.
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S.E. SEM IV (BIOMEDICAL): ELECTRONIC CIRCUIT ANALYSIS AND
DESIGN-II
Q.3 For the circuit shown below, find the range of input voltages that are to be
applied at input terminals, such that output remains undistorted.
(Vcc = 15V)
Q.4 Enlist the features of voltage follower & draw its equivalent circuit.
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S.E. SEM IV (BIOMEDICAL): ELECTRONIC CIRCUIT ANALYSIS AND
DESIGN-II
Q 5. Explain transfer characteristics of op-amp.
References:
Date: Grade: Faculty Incharge:
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S.E. SEM IV (BIOMEDICAL): ELECTRONIC CIRCUIT ANALYSIS AND
DESIGN-II
EXPERIMENT NO: - 3
_______________________________________________________________________
AIM: Design the op-amp circuits for the following equations
a. AdderVo= -3V1+4V2
b. SubstractorVo= Vb-Va
APPARATUS REQUIRED: Multimeter, Dual power supply
COMPONENTS: Connecting wires, resistors: 1K, 10K, LM741 IC, Bread Board,
Connecting wires.
a. ADDER:i. Inverting adder
CIRCUIT DIAGRAM:
THEORY: Vo= -Rf{(Va/Ra)+(Vb/Rb)}
1) Summing Amplifier :- If Ra=Rb=Rf,Vo= -(Va+Vb)
2) Scaling or weighted amplifier: Each i/p volt is amplified by a different factorsi.e weighted differentially at the o/p , the circuit is then a scaling or weighted
amplifier
Vo= -{(Rf/Ra).Va+(Rf/Rb).Vb}
+Vcc
-VEE
V0
-
+
Vb
Rf=100K
Va
Ra
Rb
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S.E. SEM IV (BIOMEDICAL): ELECTRONIC CIRCUIT ANALYSIS AND
DESIGN-II
3) Averaging Circuit: Ra=Rb=R & Rf/R=1/n where n=no. of i/psEg. n=2 then Vo=Va=Vb/2
PROCEDURE:
Connections are given as per the circuit diagram. + Vcc and - Vcc supply is given to the power supply terminal of the Op-Amp IC.
Give appropriate input voltage to the non - inverting input terminal of the Op-Amp.
The output voltage is obtained on the multimeter.OBSERVATIONS:
Sr. No Vin Vo(theoretical) Vo(practical)
1. Va=Vb=
2. Va=Vb=
3. Va=Vb=
4. Va=Vb=
5. Va=Vb=
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S.E. SEM IV (BIOMEDICAL): ELECTRONIC CIRCUIT ANALYSIS AND
DESIGN-II
b. SUBTRACTOR
CIRCUIT DIAGRAM:
+Vcc
-VEE
V0
-
+
10K
10K
10K
10K
Va
Vb
THEORY: Ra=Rb=Rf
Hence gain of differential amplifier is 1.
Vo= -Rf/R(Va-Vb)
Vo=Va-VbHence o/p voltage is equal to the voltage applied to the non inverting terminal
minus voltage applied to the inverting terminal. Hence the circuit is called as
Subtractor.
PROCEDURE:
Connections are given as per the circuit diagram. + Vcc and - Vcc supply is given to the power supply terminal of the Op-Amp IC. Give the appropriate input voltage is applied to the non - inverting input terminal of
the Op-Amp.
The output voltage is obtained on the multimeter.
OBSERVATIONS:
Sr.No Vin Vo(theoretical) Vo(practical)
1. Va=Vb=
2. Va=
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S.E. SEM IV (BIOMEDICAL): ELECTRONIC CIRCUIT ANALYSIS AND
DESIGN-II
Vb=
3. Va=Vb=
4. Va=
Vb=
5. Va=Vb=
CONCLUSION:
Questions:
Q.1 How adder can be used as scalar & averaging amplifier? (Explain for NINV)
Q.2 Supply voltage=+15V, Va=2v, Vb=-3v, Vc=4v,R=R1=1k ,Rf=2k. Determine V1 at
the NINV terminal & Vo for NINV adder.
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S.E. SEM IV (BIOMEDICAL): ELECTRONIC CIRCUIT ANALYSIS AND
DESIGN-II
Q.3 When the resistances used in subtractor are not equal, how Vo can be calculated?
References:
Date: Grade: Faculty Incharge
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S.E. SEM IV (BIOMEDICAL): ELECTRONIC CIRCUIT ANALYSIS AND
DESIGN-II
EXPERIMENT NO: - 4
_______________________________________________________________________
AIM: To design an Integrator circuit for the given specifications using
Op-Amp IC 741 & study its frequency response.
APPARATUS REQUIRED: Function generator, CRO, Dual power supply
COMPONENTS: Connecting wires, resistors: 1.5K, 15K, 0.1F, LM741 IC, BreadBoard, Connecting wires and probes
THEORY:
A circuit in which the output voltage waveform is the integral of the input voltagewaveform is the integrator. Such a circuit is obtained by using a basic inverting amplifier
configuration if the feedback resistor Rf is replaced by a capacitor Cf . The expression for
the output voltage is given as,
Vo = - (1/RfC1) Vi dt
Here the negative sign indicates that the output voltage is 1800
out of phase with the inputsignal. Normally between fa and fb the circuit acts as an integrator. Generally, the value of
fa < fb . The input signal will be integrated properly if the Time period T of the signal islarger than or equal to RfCf. That is,
T RfCf
The integrator is most commonly used in analog computers and ADC and signal-waveshaping circuits.
Design:
Let fa = 100Hz , fb= 1KHz
fb= 1/2R1CFLet CF= 0.1FThus, R1= 1.5KNow, Fa= 1/2RFCFThus, RF= 15K
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S.E. SEM IV (BIOMEDICAL): ELECTRONIC CIRCUIT ANALYSIS AND
DESIGN-II
CIRCUIT DIAGRAM OF INTEGRATOR:
PROCEDURE:
Connections are given as per the circuit diagram. + Vcc and - Vcc supply is given to the power supply terminal of the Op-Amp IC. Give 20mV with 1KHz input signal to obtain sinusoidal waveform The output voltage is obtained in the CRO and the input and output voltage
waveforms are plotted in a graph sheet.
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S.E. SEM IV (BIOMEDICAL): ELECTRONIC CIRCUIT ANALYSIS AND
DESIGN-II
OBSERVATIONS:
S.No. Amplitude
( No. of div x Volts per div )
Time period
( No. of div x Time per div )
Input
Output
CONCLUSION:
Questions:
Q.1 Draw basic integrator circuit & draw its frequency response curve. Mark
operating frequencies.
Q.2Write the problems associated with basic integrator. How to overcome it?
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S.E. SEM IV (BIOMEDICAL): ELECTRONIC CIRCUIT ANALYSIS AND
DESIGN-II
Q.3 Enlist the application of integrator.
References:
Date: Grade: Faculty Incharge:
Date:
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S.E. SEM IV (BIOMEDICAL): ELECTRONIC CIRCUIT ANALYSIS AND
DESIGN-II
Date:
EXPERIMENT NO: - 5
_______________________________________________________________________
AIM: To design a Differentiator circuit for the given specifications using
Op- Amp IC 741 & study its frequency response.
APPARATUS REQUIRED: function generator, CRO, Dual power supply
COMPONENTS: Connecting wires, resistors: 1.5K, 15K, 0.1F, LM741 IC, Bread
Board, Connecting wires and probes
THEORY: To design differentiator, we follow the steps as given:
1) Fa= 1KHz = 1/(2 Rf C1)Let C1 = 0.1uF; then Rf = 1/(2)(103)(10-7) = 1.59KLet Rf be 1.5 K
2) Fb = 20KHz = 1/ (2 R1 C1)Hence, R1= 79.5Let R1 = 82. Since R1C1 = RfCfCf = 0.0055uF
CIRCUIT DIAGRAM OF DIFFERENTIATOR:
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S.E. SEM IV (BIOMEDICAL): ELECTRONIC CIRCUIT ANALYSIS AND
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PROCEDURE:
Connections are given as per the circuit diagram. + Vcc and - Vcc supply is given to the power supply terminal of the Op-Amp IC. Give 20mV with 1KHz input signal to obtain sinusoidal waveform The output voltage is obtained in the CRO and the input and output voltage
waveforms are plotted in a graph sheet.
OBSERVATIONS:
Input - Sine wave
S. No. Amplitude
( No. of div x Volts per div )
Time period
( No. of div x Time per div )
Input
Output
InputSquare wave
S. No. Amplitude
( No. of div x Volts per div )
Time period
( No. of div x Time per div )
InputOutput
Questions:
Q.1 If a sine wave of 1 V peak at 1000hz is applied to the designed differentiator, find
its output voltage.
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S.E. SEM IV (BIOMEDICAL): ELECTRONIC CIRCUIT ANALYSIS AND
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Q.2 Draw basic differentiator circuit and draw its frequency response curve. Mark
operating frequencies.
Q.3 Write the problems associated with basic differentiator. How to overcome it?
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S.E. SEM IV (BIOMEDICAL): ELECTRONIC CIRCUIT ANALYSIS AND
DESIGN-II
Q.4 Enlist the application of differentiator.
References:
Date: Grade: Faculty Incharge
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S.E. SEM IV (BIOMEDICAL): ELECTRONIC CIRCUIT ANALYSIS AND
DESIGN-II
EXPERIMENT NO: - 6
_______________________________________________________________________
AI M: To design a wein bridge oscillator using 741 to generate a frequency of 965 Hz.
APPARATUS REQUIRED: function generator, CRO, Dual power supply
COMPONENTS: Connecting wires, resistors: R=3.3k, R1=12k, Rf=50k, C= 0.05F,
LM741 IC, Bread Board, Connecting wires and probes.
DESIGNING PROCEDURE:
Assume output frequency=965Hz
Step 1:The frequency oscillations is,
F0=1/2RCRC=1/2fo=1/2*965Hz=secAssume C=0.05 F, R=3.3K
Step 2: The condition of oscillation is
Av=3Gain of op-amplifier in non inverting mode is Av=1+Rf/R1,
3=1+Rf/R1
Rf= 2 R1
Thus, Rf= 2*12k = 24k
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S.E. SEM IV (BIOMEDICAL): ELECTRONIC CIRCUIT ANALYSIS AND
DESIGN-II
CIRCUIT DIAGRAM OF WEIN BRIDGE OSCILATOR:
R1 RF
+VCC
2 76
3 4VO
C
-VEE
RR C
PROCEDURE:
Connections are given as per the circuit diagram. + Vcc and - Vcc supply is given to the power supply terminal of the Op-Amp IC. The output voltage is obtained in the CRO
OBSERVATIONS:
S.No. Amplitude Time period
( No. of div x Time per
div )
Frequency
Output
CONCLUSION:
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S.E. SEM IV (BIOMEDICAL): ELECTRONIC CIRCUIT ANALYSIS AND
DESIGN-II
Questions
Q.1 What is oscillator.
Q.2 Draw the block diagram of oscillator.
Q.3 Write the barkhausen criterion.
References
Date: Grade: Faculty Incharge:
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S.E. SEM IV (BIOMEDICAL): ELECTRONIC CIRCUIT ANALYSIS AND
DESIGN-II
EXPERIMENT NO: - 7
___________________________________________________________________
AIM: To study effect of feedback using CE amplifier
APPARATUS:Transistor BC-547
Regulated power Supply (0-30V, 1A)
Function Generator
CROResistors [33K, 3.3K, 330, 1.5K
1K, 2.2K, 4.7K]Capacitors- 10F -2NoBread Board
Connecting Wires
THEORY:1) Current-Series feedback:
i. GMs = Transconductance including Rsii. GMl = Io/Vi = Transconductance including load (without feedback)
iii. GMf= Io/Vs = Transconductance with feedbackiv. = Vf/Io = Gain of feedback circuit
2) Voltage-Series feedback:i. AVs = Voltage gain including Rs
ii. AVl = Vo/Vi = Voltage gain without feedback but with RLiii. AVf= Vo/Vs = Voltage gain with feedbackiv. = Vf/Vo = Gain of feedback network
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S.E. SEM IV (BIOMEDICAL): ELECTRONIC CIRCUIT ANALYSIS AND
DESIGN-II
CIRCUIT DIAGRAM:
PROCEDURE:
1. Connect the circuit as shown in circuit diagram
2. Apply the input of 20mV peak-to-peak and 1 KHz frequency using function Generator3. Measure the Output Voltage Vo (p-p) for various load resistors
4. Tabulate the readings in the tabular form.
5. The voltage gain can be calculated by using the expression, Av= (V0/Vi)
6. For plotting the frequency response the input voltage is kept Constant at 20mV peak-to-peak and the frequency is varied from 100Hz to 1MHz Using function generator
7. Note down the value of output voltage for each frequency.8. All the readings are tabulated and voltage gain in dB is calculated by Using the expressionAv=20 log10 (V0/Vi)
9. A graph is drawn by taking frequency on x-axis and gain in dB on y-axis
On Semi-log graph.10. The band width of the amplifier is calculated from the graph using the express,Bandwidth, BW=f2-f1
Where f1 lower cut-off frequency of CE amplifier, and
Where f2 upper cut-off frequency of CE amplifier11. The bandwidth product of the amplifier is calculated using expression
Gain Bandwidth product=3-dBmidband gain X Bandwidth
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S.E. SEM IV (BIOMEDICAL): ELECTRONIC CIRCUIT ANALYSIS AND
DESIGN-II
OBSERVATIONS:
Input voltage Vi =20mV
FREQUENCY (Hz) OUTPUT
VOLTAGE (V0)
GAIN
AV=(V0/Vi)
GAIN IN dB
Av=20log10(V0/Vi)
FREQUENCY RESPONSE:
Vi =20mv
Sr. no FREQUENCY(Hz) OUTPUT
VOLTAGE (V0)
GAIN IN dB
Av=20 log10 (V0/Vi)
1. 102. 503. 1004. 2005. 3006. 4007. 5008. 6009. 70010. 80011. 90012. 1K13. 2K14. 10K15. 20K16. 80k17. 90K18. 100k19. 120K20. 150k21. 160K22. 180K23. 220K24. 300K25. 400K26. 500K
Sr. no FREQUENCY(Hz) OUTPUT GAIN IN dB
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S.E. SEM IV (BIOMEDICAL): ELECTRONIC CIRCUIT ANALYSIS AND
DESIGN-II
VOLTAGE (V0) Av=20 log10 (V0/Vi)
27. 600K
27. 700K28. 800K29. 900K30. 1M
CALCULATIONS:1. Bandwidth:
2. fH, fL:
MODELWAVE FORMS:
INPUT WAVE FORM:
OUTPUT WAVE FORM
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S.E. SEM IV (BIOMEDICAL): ELECTRONIC CIRCUIT ANALYSIS AND
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FREQUENCY RESPONSE
Questions:
Q.1 Differentiate features of CE amplifier with feedback & without feedback.
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S.E. SEM IV (BIOMEDICAL): ELECTRONIC CIRCUIT ANALYSIS AND
DESIGN-II
Q.2 Derive relations of Rif, Rof, gain of the amplifier.
References:
Date: Grade: Faculty Incharge:
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S.E. SEM IV (BIOMEDICAL): ELECTRONIC CIRCUIT ANALYSIS AND
DESIGNING-II
CONCLUSION:
Questions:
Q.1 What is the function of capacitor in regulated power supply circuit?
Q.2 How 78XX can be used as adjustable current source?
Q.3 Write the specifications of 78XX
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S E SEM IV (BIOMEDICAL) ELECTRONIC CIRCUIT ANALYSIS AND
Q.4 Write the specifications of 79XX
References:
Date: Grade: Faculty Incharge: