SEM-4 4th

Semester – B.E. / B.Tech.

BR-106 Department of Electronics and Communication Engineering

EC6404 LINEAR INTEGRATED CIRCUITS

Part-A (10 x 2 = 20 Marks)

UNIT – I

No Question Level Competence Mark

1.1 Describe offset voltage of an operational amplifier L1 Knowledge 2

1.2 Define CMRR L1 Knowledge 2

1.3 Explain the concept that what do you mean by balanced

and unbalanced output L2 Comprehension 2

1.4 Specify the characteristics of ideal Opamp L1 Knowledge 2

1.5 What do you understand by the term ‘thermal drift’? L1 Knowledge 2

1.6 Write short note about current mirror with

magnification. L1 Knowledge 2

1.7 Describe slew rate and what causes the slew rate L1 Knowledge 2

1.8 State loading effect. How can you reduce it? L2 Comprehension 2

1.9 Why do we use Rcomp resistor? L2 Comprehension 2

1.10 What is the gain cross over and phase cross over

frequencies? L2 Comprehension 2

2.1 Categorize the characteristics of an ideal op-amp. L3 Application 2

2.2 Give the internal block diagram of an op-amp. L3 Application 2

2.3 Draw the pin diagram of IC 741. L3 Application 2

2.4 Write note about input bias current. L4 Analysis 2

2.5 Analyzing the draw backs of using large RC in L4 Analysis 2

Nadar Saraswathi College of Engineering and Technology,

Vadapudupatti, Theni - 625 531

(Approved by AICTE, New Delhi and Affiliated to Anna University, Chennai)

Format No. NAC/TLP-

07a.12

Rev. No. 02

Date 12-11-2015

Total Pages 01

Question Bank for the Units – I to V

differential amplifier.

2.6

Brief the necessity of active loads preferred than

passive loads in the input stage of an operational

amplifier.

L5 Evaluation 2

2.7 Justify that, why IC741 op-amp not used for high

frequency applications? L5 Evaluation 2

2.8

Calculate the maximum distorted amplitude that a

sine wave input of 10kHz, can produce at the output

of an op-amp whose slew-rate is 0.5v/μsec.

L6 Synthesis

2

2.9

A Differential amplifier has a differential voltage

gain of 2000 and common mode gain of 0.2.

Determine CMRR.

L6 Synthesis

2

UNIT – II

3.1 What are the advantages of variable

transconductance technique? L2

Comprehension 2

3.2

Write the output expression for following: inverting

& non- inverting amplifiers, Integrator and

differentiator.

L2 Comprehension

2

3.3 Mention the applications of voltage to current

converters. L2

Comprehension 2

3.4 Brief note about an instrumentation amplifier

L1 Knowledge

2

3.5 Compare the performance of inverting and non-

inverting operational amplifier configurations. L4

Analysis 2

3.6 Give the applications of inverting & non- inverting

amplifiers. L1

Knowledge 2

3.7 Draw the inverting & non- inverting amplifiers with

appropriate equations. L3

Application 2

3.8

List the applications for each of the following

circuits: Voltage follower, Peak detector, Schmitt

trigger, Clamper.

L2 Comprehension

2

3.9 Why integrators are preferred over differentiators in

analog computers? L5

Evaluation 2

3.10 Summarize the frequency expressions for LPF, HPF

and BPF. L1

Knowledge 2

4.1 Enumerate the advantages & disadvantages of

passive filters? L1

Knowledge 2

4.2 Sketch the opamp integrator & differentiator circuit

with necessary equation. L3

Application 2

4.3 Define comparator

L1 Knowledge

2

4.4 Illustrate some of the important features of an

instrumentation amplifier L1

Knowledge 2

4.5 Construct an adder circuit using op-amp to get the

output expression as Vo = - (0.1V1 +V2+5V3) L3

Application 2

4.6 Demonstrate the need for frequency compensation

in practical op-amps L4

Analysis 2

4.7 Show the necessity of active guard drive in an

instrumentation amplifier. L4

Analysis 2

4.8 How does precision rectifier differ from the

conventional rectifier? L5

Evaluation 2

4.9 Design an amplifier with a gain of -10 and input

resistance equal to 10 k L6

Synthesis 2

UNIT - III

5.1 List the basic building blocks of PLL.

L1 Knowledge

2

5.2 Define lock‐ in range &capture range of a PLL.

L1 Knowledge

2

5.3 What is Pull‐ in time?

L1 Knowledge

2

5.4

For perfect lock, what should be the phase relation

between the incoming signal and VCO output

signal?

L4 Analysis

2

5.5 Name the classification of phase detector. Write

about switch type phase detector. L2

Comprehension 2

5.6 Illustrate the problems associated with switch type

phase detector L2

Comprehension 2

5.7 Why VCO is also called as V to F converter?

L1 Knowledge

2

5.8 On what parameters does the free running frequency

of VCO depend on? L3

Application 2

5.9 Give the expression for the VCO free running

frequency. L2

Comprehension 2

5.10 Demonstrate Voltage to Frequency conversion

factor. L2

Comprehension 2

6.11 Identify the purpose of having a low pass filter in

PLL L3

Application 2

6.12 Discuss the effect of having large capture range.

L6 Synthesis

2

6.13 Evaluate some typical applications of PLL.

L5 Evaluation

2

6.14 How would you explain compander IC? Give some

examples. L1

Knowledge 2

6.15 Identify the merits of companding.

L3 Application

2

6.16 Tell the applications of OTA.

L1 Knowledge

2

6.17 Estimate four quadrant multiplier.

L5 Evaluation

2

6.18 What is the necessity of modulation?

L6 Synthesis

2

6.19 Draw the circuit of AM detector using PLL.

L4 Analysis

2

6.20 Compare the advantages & disadvantages of

monolithic PLLs over Discrete PLLs L4

Analysis 2

UNIT - IV

7.1 How would you classify ADCs.

L2 Comprehension

2

7.2 List the direct type ADCs.

L4 Analysis

2

7.3 What is the function of integrating type converter?

List out some integrating type converters. L1

Knowledge 2

7.4 Explain in brief principle of operation of successive

Approximation ADC. L2

Comprehension 2

7.5 What are the main advantages of integrating type

ADCs? L1

Knowledge 2

7.6 Where are the successive approximation type

ADC’s used? L1

Knowledge 2

7.7 Compare the advantages and drawbacks of a

dual‐ slop ADC? L2

Comprehension 2

7.8 Distinguish between conversion time and settling

time L4

Analysis 2

7.9 Estimate your opinion of resolution of a data

converter. L5

Evaluation 2

7.10 Define accuracy of converter.

L1 Knowledge

2

8.1 Brief about monotonic DAC

L1 Knowledge

2

8.2 Summarize delta modulation.

L2 Comprehension

2

8.3 How would you justify which type of ADC is the

fastest? L5

Evaluation 2

8.4 Spell the principle of operation of voltage to time

conversion L1

Knowledge 2

8.5 Calculate the values of LSB and MSB for an 8‐ bit

DAC for 0V to 10V range L6

Synthesis 2

8.6 Construct granular error and slope overload error

L3 Application

2

8.7 Solve an 8‐ bit DAC has an output voltage range of

0‐ 2.55 V. Calculate its resolution. L3

Application 2

8.8 Invent the number of comparators required for

realizing a 4‐ bit flash ADC L6

Synthesis 2

8.9 Compare and contrast binary ladder and R‐ 2R

ladder DAC L4

Analysis 2

8.10 Model Sample and hold circuit, Why is it needed?

L3 Application

2

UNIT - V

9.1 What are the different protection circuits inside the

monolithic IC regulator? L2

Comprehension 2

9.2 List the applications of Opto coupler

L4 Analysis

2

9.3 State the two conditions for oscillation

L1 Knowledge

2

9.4 Give the classification of voltage regulators.

L2 Comprehension

2

9.5 What is a switching regulator?

L1 Knowledge

2

9.6 List the applications of 555 timer in Monostable

mode of operation L1

Knowledge 2

9.7 What are the three different wave forms generated

by ICL8038? L2

Comprehension 2

9.8 Mention the need for current limiting in voltage

regulators? L4

Analysis 2

9.9 Compare Linear regulator and Switched mode

regulator. L5

Evaluation 2

9.10 Give some examples of monolithic IC voltage

regulators L1

Knowledge 2

10.1 Draw the functional block diagram of IC 723

regulator. L1

Knowledge 2

10.2 Compare Audio Power Amplifier and Video

Amplifier. L2

Comprehension 2

10.3 How would you classify an opto-coupler ? List the

characteristics of optocouplers. L5

Evaluation 2

10.4 Define line and load regulation of a regulator.

L1 Knowledge

2

10.5

In a Astable multivibrator of 555 times RA=606kΩ

and C=0.1μF. Calculate (a) t HIGH (b)t LOW (c)

free running frequency (d) duty cycle (D).

L6 Synthesis

2

10.6 How does switched capacitor emulate resistor?

L3 Application

2

10.7 With reference to a VCO, define voltage to

frequency conversion factor Kv. L3

Application 2

10.8

In a monostable multivibrator using 555 timer,

R=100kΩ and the time delay is 100ms.Find the

value of C.

L6 Synthesis

2

10.9 List the types of Multivibrator.

L4 Analysis

2

10.10 What is the purpose of connecting a capacitor at the

input and output side of an IC voltage regulator? L3

Application 2

Part – B ( 5 x 13 = 65 Marks)

UNIT- I

11.a-1 Define and explain slew rate. Derive its equation.

Also explain method adapted to improving slew rate.

L1

Knowledge (13)

11.a-2

(i) Write down the characteristics and their

respective values of an ideal operational amplifier

(ii) Draw the circuit of basic current mirror and

explain its operation.

L1

Knowledge

(6)

(7)

11.a-3

(i) Describe about output offset voltage. Explain

methods to nullify offset voltage.(7) (ii) With neat

circuit diagram, explain the operation of Voltage

reference circuit using temperature compensation.(6)

L1

Knowledge (7)

(6)

11.a-4

(i) Discuss on current mirror with magnification.

(ii) Use appropriate block diagram, explain the

general stages of an Op-Amp IC.

L2

Comprehension (4) (9)

11.a-5

(i) Explain in detail about frequency compensation

techniques applied to operational amplifiers.

(ii) Briefly describe about multiple current sources.

L2

Comprehension (10)

(3)

11.a-6

(i) Draw the circuit of basic current mirror and

explain its operation.

(ii) Give the detail the DC analysis of a basic

differential amplifier.

L2

Comprehension (6)

(7)

11.a-7

Obtain the expression for differential gain, common

mode gain, CMRR, RI and RO of an emitter coupled

differential amplifier

L4 Analysis (7)

(6)

11.b-1

(i) Sketch the Wilson current source and give short

note about it.

(ii) Using suitable diagram and necessary equations,

explain the concept of Widlar current source used in

op-amp circuit.

L3

L4

Application

Analysis (5)

(8)

11.b-1

Show the transfer characteristics of dual input

differential amplifier showing the linear and limiting

regions. Comment on the same.

L4 Analysis

(13)

11.b-1

i) Obtain the expression for operating point values of

a basic differential amplifier.

ii) write short notes on current repeaters.

L4

L3

Analysis

Application

(8)

(5)

11.b-1 Examine the working principle of BJT differential

amplifier with active load

L5 Evaluation (13)

11.b-1

i) Compose the concept of Widlar current source

used in op-amp circuit with suitable circuit diagram

and necessary equations.

ii) Justify the preference of active load over passive

load.

L6 Synthesis

(10)

(3)

11.b-1 Define and write note about each terms Slew rate,

Input Bias current, offset voltage, thermal drift.

L1 Knowledge (13)

11.b-1 State about CMRR, Ad, Ac and suggest a method to

improve CMRR.

L4 Analysis (13)

UNIT - II

12.a-1 Explain the operation of Instrumentation amplifier with

suitable diagram. L2 Comprehension (13)

12.a-2 Demonstrate Adder, Subtractor, Averaging circuit using

Opamp with equations. L6 Synthesis (13)

12.a-3 Illustrate the operation of current to voltage and Voltage

to current converter circuits. L1 Knowledge (13)

12.a-4

(i) Draw and explain the operation of Triangular wave

generator.

(ii) Write short notes on second order Low Pass

Butterworth filter (Sallen-key filter).

L1

L1

Knowledge

Knowledge

(5)

(8)

12.a-5 Derive the expression for log computation using opamp

and explain necessary circuit diagram. L5

Evaluation (13)

12.a-6 Construct the basic opamp circuit for the mathematical

operation of differentiation and explain in detail. L1

Knowledge (13)

12.a-7 Draw and explain the circuit of a voltage to current

converter if the load is i) Floating ii) Grounded L1 Knowledge (7)

(6)

12.b-1

(i) Design an OP-AMP based first order active low pass

filter.

(ii) Creating a second order Butterworth LPF having

upper cut-off frequency 1 kHz. Determine the frequency

response.

L6

L6

Synthesis

Synthesis (8)

(5)

12.b-2

i) Construct precision diode circuit

ii) Using appropriate equations discuss about the working

of Half wave Precision Rectifier.

L4

L3

Analysis

Application

(3)

(10)

12.b-3

(i) With neat sketch explain the working of Full wave

Precision Rectifier in detail.

(ii) Sketch the Integrator circuit and explain the working

principle in detail.

L3

L3

Application

Application (8)

(5)

12.b-4

i) With neat diagram explain the operation of Schmitt

trigger.

ii) Give detailed note about opamp band pass filter.

L2

L2

Comprehension

Comprehension

(5)

(8)

12.b-5

Conclude that how antilog computations are performed

using IC-741 explain using circuits and necessary

equations. L5

Evaluation (13)

12.b-6

(i) Examine the principal of operation of Voltage follower

With the neat circuit diagram and mathematical

expressions.

(ii) With the neat circuit diagram and mathematical

expressions, explain the operation of Scale changer.

L4

L3

Analysis

Application

(6)

(7)

12.b-7 Discuss wave shaping circuits using operational amplifier L2 Comprehension (13)

UNIT - III

13.a-1 How would you describe the block diagram of PLL and

derive the expression for Lock range and capture range. L1 Knowledge

(13)

13.a-2 Illustrate the operation of VCO with neat block diagram.

Also derive an expression for f0. L2 Comprehension

(13)

13.a-3

(i) Analyze the Gilbert’s four quadrant multiplier cell

with a neat circuit diagram.

(ii) Identify how a frequency doubler can be realized

using this cell.

L4

L3

Analysis

Application (8)

(5)

13.a-4 Discuss any three applications of PLL in detail. L6 Synthesis (13)

13.a-5

Explain the purpose and functioning of

(i) Variable trans‐ conductance multiplier

(ii) Frequency synthesizer

L2 Comprehension (7)

(6)

13.a-6

ii) Estimate the working principle of operational

Transconductance Amplifier (OTA).

ii) Explain the application of VCO for FM generation.

L3

L1

Application

Knowledge

(8)

(5)

13.a-7

i) Define capture range and lock range.

ii) Explain the process of capturing the lock and also

derive for capture range and lock range.

L1

L1

Knowledge

Knowledge

(3)

(10)

13.b-1

i) How would you explain the working of a VCO.

ii) Derive the expression for voltage to frequency

conversion factor.

L1

L1

Knowledge

Knowledge

(6)

(7)

13.b-2 Determine how the IC 565 PLL can be used as a

Frequency multiplier/divider. L5 Evaluation

13.b-3

(i) Outline the multiplier cell using emitter‐ coupled

transistor pair. (8)

(ii) Analyze that the output voltage is proportional to the

product of the two input voltages and state their

limitations.

L2

L4

Comprehension

Analysis (8)

(5)

13.b-4 Briefly explain the use of PLL for FM detection and the

process of FSK demodulation. L1 Knowledge

(13)

13.b-5

Discuss the following applications of Analog Multiplier

ICs

(i)Voltage squarer

(ii)voltage divider

(iii)square rooter

(iv)Phase angle detector

L2 Comprehension (3)

(4)

(3)

(3)

13.b-6

(i)For PLL 565, given the free-running frequency as

100KHz, the demodulation capacitor of 2μf and supply

voltage is ±6V, determine the lock and capture

frequencies and identify the component values.

(ii) A PLL has a free running frequency of 300KHz and

the bandwidth of the low pass filter is 50KHz. Check

whether the loop acquires lock for an input signal of

320KHz.

L4

L3

Analysis

Application

(8)

(5)

13.b-7

(i) What do you mean by variable Transconductance

Analog multiplier?

(ii) Determine the output frequency f0, lock range ΔfL and

capture range ΔfC of IC 565. Assume R1=15K C1=0.01μF,

C=1μF and the supply voltage is +12V.

L2

L4

Comprehension

Analysis (5)

(8)

UNIT - IV

14.a-1

With neat internal diagram, explain the following

(i) Dual slope ADC .

ii) Successive Approximation ADC. L2 Comprehension (6)

(7)

14.a-2

i) Estimate the working of R‐ 2R ladder type DAC. (7)

ii) Compare binary weighted DAC with R‐ 2R ladder

network DAC. (6)

L5

L4

Evaluation

Analysis

(7)

(6)

14.a-3 With circuit schematic explain analog switches using

FET. L1 Knowledge (13)

14.a-4 i) What are the different sources of error in DAC.

ii) Analyze the types of errors in DAC. L4 Analysis (7)

(6)

14.a-5 Show the operation of any two direct type of ADCs. L1 Knowledge (13)

14.a-6

Discuss in detail about the following Digital to Analog &

Analog to Digital conversion techniques.

i) Flash type ADC.

ii) Weighted resistor DAC.

L2

L2

Comprehension

Comprehension

(7)

(6)

14.a-7

(i)Draw the diagram of sample and hold circuit.

(ii)State how you will reduce its hold mode droop. L1

L1

Knowledge

Knowledge

(6)

(7)

14.b-1

Design a 4 –bit binary weighted resistor DAC for the

following specifications: Use LM741 op‐ amp, R =

10kΩ, Vref =2.5V and full scale output = 5V. L6 Synthesis (13)

14.b-2

A dual slope ADC has a full scale input of 2 Volts .It uses

an integrating time of 10ms and integrating capacitor of

0.1μf.the maximum magnitude of the integrator output

should not exceed 3V. Calculate the value of the

integrating resistor.

L3 Application (13)

14.b-3

i)Explain the working of a voltage to time converter and

voltage to frequency converter.

ii) Construct the working of dual slope ADC.

L5

L3

Evaluation

Application

(7)

(6)

14.b-4

Draw the block diagram and explain the working of:

(i) Charge Balancing VFCS.

(ii) Voltage to Time converter.

L1

L1

Knowledge

Knowledge

(6)

(7)

14.b-5

(i)Elaborate the operation of high speed sample and hold

circuits

(ii)Develop a system employs a 16-bit word for

representing the input signal. If the maximum output

voltage is set 2V, calculate the resolution of the system

and its dynamic range.

L6 Synthesis (9)

(4)

14.b-6

Summarize the various important specifications of both

D/A and A/D converters generally specifeied by the

manufactures are analyzed. L2 Comprehension (13)

14.b-7

(i)The basic step of a 9-bit DAC is 10.3mV. If 000000000

referents 0V, what output is produced if the input is

101101111?

(ii)calculate the values of the LSB, MSB and full scale

output for an 8-bit DAC for the 0 to 10V range.

(iii)What output voltage would be produced by a D/A

converter whose output range is 0 to 10V and whose input

binary number is

(i) 10 (for a 2-bit D/A converter)

(ii) 0110 (for a 4-bit DAC)

(iii) 10111100 (for a 8-bit DAC).

L5

L4

L4

Evaluation

Analysis

Analysis

(3)

(5)

(5)

UNIT - V

15.a-1 Write a short notes on L2 Comprehension (4)

i) Opto couplers

ii) Switched capacitor filter

iii) Isolation amplifier

(4)

(5)

15.a-2

(i) Explain the functional diagram of LM 380 power

amplifier.

(ii)Write the essential characteristics of power amplifier. L2

Comprehension (8)

(5)

15.a-3

i) What is 555 timer? Explain the working of 555 timer as

Monostable Multivibrator

ii) Derive an expression for the frequency of oscillation

with relevant waveforms

L1

Knowledge (7)

(6)

15.a-4

(i) What is a Switching regulator? Explain the operation

of switching regulator with neat diagram. (8)

(ii) Write short note on frequency to voltage

converters.(5)

L4

Analysis (8)

(5)

15.a-5

(i) Explain the working of Astable Multivibrator using

op-amp.

(ii) Explain any one application of Astable Multivibrator L1

Knowledge (8)

(5)

15.a-6

i)Design a phase shift oscillator to oscillate at 100 Hz. (6)

ii)Describe Monostable multivibrator with necessary

diagrams and derive for ON time and recovery time.(7) L6

Synthesis (6)

(7)

15.a-7

(i) Explain the working of Linear Voltage regulator with

neatcircuit diagram using op-amps.

(ii) Write any two important features of linear voltage

regulator IC723.

L1

Knowledge (8)

(5)

15.b-1 (i)Briefly describe about monolithic switching regulator.

(ii) Write short note on voltage to frequency converters. L5 Evaluation (8)

(5)

15.b-2

(i)Explain in detail the function of 555 timer in Astable

mode

(ii)Derive the expression for the pulse width. L3

Application (7)

(6)

15.b-3

(i) What is the basic principle of function generator?

Draw the schematic of ICL 8038 function generator and

discuss its features.

(ii)Find the expression for the frequency of a triangular

waveform generator and explain the circuit.

L3

Application

(7)

(6)

15.b-4

With a neat functional diagram,explain the working of

555 timer as monostable multivibrator and derive an

expression for the frequency of oscillation with relevant

waveforms.

L2

Comprehension

(13)

15.b-5 (i) Explain the working of monostable multivibrator.

(ii) What are opto-couplers? L1 Knowledge (10)

(3)

15.b-6

(i) Analyzing the working of a general purpose voltage

regulator.

(ii) What is the need for isolation amplifiers? L4

Analysis (10)

(3)

15.b-7 With a neat circuit diagram, explain the working of linear

voltage regulator using operational amplifier. L1

Knowledge (13)

Part – C ( 1 x 15 = 15 Marks)

UNIT-1

16 .a-1

Derive the transfer characteristics of dual input

differential amplifier showing the linear and limiting

regions. Comment on the same

L5 Evaluation 7

8

16.a-2

(i)A square wave peak-to-peak amplitude of 50mV has to

be amplified to a peak-to-peak amplitude of 3V, with rise

time of 4 μs or less. Can IC741 be used?

(ii)A IC741 Op-Amp whose slew rate is 0.5V/μs is used

as an inverting amplifier with a gain of 50.The voltage

gain Vs frequency curve of IC741 is flat up to 20 kHz.

What maximum peak to peak input signal can be applied

without distorting the output?

L6 Synthesis 5

10

(OR)

16.b-1

Explain in detail the a.c analysis of dual input,

balanced output differential amplifier or derive the

expression for differential gain, common mode gain,

CMRR, RI and RO of an emitter coupled differential

amplifier.

L5 Evaluation 15

16.b-2

Illustrate each direct current characteristics of

operational amplifier with necessary equations and

diagrams.

L6 Synthesis 15

UNIT - II

16 .a-1 Evaluate Inverting adder and Non-inverting adder with

neat circuit diagram and mathematical expressions. L5 Evaluation 15

16 .a-2 Create any of three opamp based mathematical function

circuits L6 Synthesis 15

(OR)

16.b-1 i) Design a Butterworth low pass filter circuit using

operational amplifier.

ii) Design a wide band filter having FL=400Hz, FH=2kHz

and pass band gain of 4.Find the value of Q of filter

L6

L6

Synthesis

Synthesis 10

5

16.b-2 Justify that how the precision diode differs from

conventional one. Explain a application with neat sketch. L5 Evaluation 15

UNIT - III

16 .a-1 (i)Explain the working of IC 565.

(ii)Label the application of PLL used for FM detection. L1 Knowledge

10

5

16 .a-2 Illustrate With a neat diagram prove that the output

voltage in a four quadrant, variable trans conductance

multiplier is proportional to the product of input voltages

V1×V2.

L2 Comprehension 15

(OR)

16.b-1 Measure the closed loop analysis of PLL with necessary

diagrams. L5 Evaluation 15

16.b-2 Construct the block diagram and explain principle of

working, characteristics and applications of:

(i) Frequency systhesizer.

(ii) Frequency shift keying (FSK) Demodulator

L3 Application 8

7

UNIT - IV

16 .a-1 Consider the R-2R 4-bit converter and assume that

feedback resistance Rf of the op-amp is variable , the

resistance R=10kΩ and VR =10V. Determine the value of

Rf that should be connected to achieve the following

output conditions.

(i) The value of 1 LSB at the output is 0.5V

(ii) An analog output of 6V for abinary input of 1000.

(iii) The Full-scale output voltage of 12V

(iv) The actual maximum output voltage of 10V

L5 Evaluation 15

16 .a-2 (i)Analyse the Inverted or Current mode R-2R Ladder

Digital to Analog converter.

(ii)Examine the inverted R-2R ladder (refer above

question) has R=Rf=10kΩ and VR=10V. Calculate the

total current delivered to the op-amp and the output

voltage when the binary input is 1110.

L5

L4 Evaluation

10

5

(OR)

16.b-1 (i)With example explain the successive Approximation

ADCTechnique. (11)

(ii) Discuss the important specification of Data

Converters (4)

L1 Knowledge 11

4

16.b-2 (i) Compare single slope ADC and dual slope ADC. (3)

(ii)Draw the circuit and explain the working of dual slope

A/D converter. (7)

(iii)For a particular dual slope ADC, t1 is 83.33ms and the

reference voltage is 100mv. Calculatet2 if (5)

1. V1 is 100 mv and 2. 200 mv

L2 Comprehension 3

7

5

UNIT - V

16 .a-1 In a astable multivibrator using 555 timer Ra=6.8K,Rb

= 3.3 K,C= 0.1uF.Calculate the free running frequency. L5 Evaluation 15

16 .a-2 Analyze the important features and pin details of

switched capacitor filter IC MF10. L6 Synthesis 15

(OR)

16.b-1 Derive the expression and circuit operation for LM 380

Audio power amplifier L5 Evaluation 15

16.b-2 Design an adjustable voltage regulator circuit using

LM 317 for the following specifications: Input dc

voltage =13.5 V; Output dc voltage = 5 to 9V;Load

current (maximum) = 1A.

L6 Synthesis 15

L1: Knowledge, L2: Comprehension, L3: Application, L4: Analysis, L5: Evaluation, L6: Synthesis

QUESTION BANK SUMMARY

S.NO UNIT DETAILS L1 L2 L3 L4 L5 L6 TOTAL

1 Unit-1

PART-A 6 4 3 2 2 2 19

PART-B 4 3 2 4 1 1 15

PART-C 2 2 04

2 Unit-2

PART-A 6 4 3 3 2 1 19

PART-B 5 4 4 2 2 3 20

PART-C 2 3 05

3 Unit-3

PART-A 5 4 3 3 2 2 19

PART-B 7 5 3 4 1 1 21

PART-C 1 1 1 1 04

4 Unit-4

PART-A 6 4 3 3 2 2 20

PART-B 6 4 2 4 3 2 21

PART-C 1 1 1 2 05

5 Unit-5

PART-A 6 4 3 3 2 2 20

PART-B 5 3 2 2 1 1 14

PART-C 2 2 04

Total No of Questions

PART-A PART-B PART-C TOTAL

97 91 22 210

Prepared By:

Staff Name1: M.ARIVALAGAN AP/ECE

Staff Name2: -

STAFF IN CHARGE HOD PRINCIPAL