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SIGNAL CONDITIONING CIRCUITS QUESTION BANK

Ms. Nirmal kumar pandey/EI/SCC/QB/UNIT- I to V/2013-14 Page 1

Unit-1

Two Marks

Q.1What is the need of swamping resistance. (April-May 2010)Q.2Define opamp. (April-May 2013,2009)Q.3List out ideal V/s practical characteristics of IC 741 Op-amp. (Nov.-Dec. 2008)Q.4What is the significance of DC analysis of op-amp ? (Nov.-Dec. 2012)

Seven Marks

Q.5Obtain an expression of voltage gain, input impedance and output impedance of apractical inverting Amplifier. (April-May 2010)

Q.6An Op-amp is used in voltage follower mode having a slew rate of 0.5 V/s. If theamplitude of the sine wave is 7V , find the slew rate limited frequency. Find the peak

value of the sinusoidal output voltage that can be produced if Op-amp circuit has closed

loop gain of 10. Assume UGB of Op-amp as 800 KHz. (April-May 2010)

Q.7Explain all parameters of opamp with their practical values. (April-May 2009)Q.8Discuss closed loop differential amplifiers configuration with opamp & also derive an

expression for its voltage gain. (April-May 2009)

Q.9An opamp has a differential gain of 80 dB and CMRR of 95 dB. If V 1 = 2V and V2 =1.6V, then calculate the differential and common mode output values. (April-May

2009)Q.10 Explain the types of frequency compensation techniques used in Op-amps ?

(Nov.-Dec. 2008)

Q.11Explain block diagram of a typical operational amplifier. (Nov.-Dec. 2008)Q.12Derive the expression for voltage gain of inverting amplifier. (Nov.-Dec. 2008)Q.13Explain why open-loop op-amp configuration are not used in linear applications.

(April-May 2008)

Q.14What are the three factors that affect the electrical parameters of an op-amp ? (April-May 2008)

Q.15What is a voltage transfer curve of an op-amp ? (April-May 2008)Q.16For a practical inverting amplifier using op-amp derive the expression for the input

and output resistance with feedback. (Nov.-Dec. 2007)

Q.17Draw the block diagram of opamp and explain in detail. (April-May 2013)Q.18Write the ideal characteristics of opamp. (April-May 2013)Q.19Describe open-loop and closed loop configuration of opamp. (April-May 2013)


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Q.20Give the difference between the ideal and practical characteristics of op-amp ? (Nov.-Dec. 2012)

Q.21Do the AC analysis of op-amp for: Differential gain, Common mode gain, CMRR,Differential input impedance, output impedance. (Nov.-Dec. 2012)

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UNIT-2

Two Marks

Q.1What is voltage follower ? (April-May 2013,2010, 2009)Q.2What is the difference between comparators and Op-amps ? (Nov.-Dec. 2008)Q.3Why we called the voltage follower as a isolation amplifier ? (Nov.-Dec. 2012)

Seven Marks

Q.1Explain instrumentation amplifier ? (April-May 2013, 2010)Q.2Explain temperature compensated logarithmic amplifier. Why it is necessary. (April-

May 2010)

Q.3Show with the help of circuit diagram an Op-amp used as :i. Scale changer

ii. Phase shifteriii. Inverting adderiv. Non inverting adder. (April-May 2010)

Q. 4 Explain the subtractor using opamp & derive its formula for output voltage. (April-May

2009)

Q.5 Write a short note on Window Detector.(April-May 2009)

Q.6 Design a practical integration circuit with a d.c. gain of 10, to integrate a square wave of

10 KHz. (April-May 2009)

Q.7 Explain the op-amp as zero crossing detector. (Nov.-Dec. 2008)

Q.8 Explain the op-amp as integrator circuit. (Nov.-Dec. 2008)Q.9 Explain the op-amp as logarithmic amplifier. (Nov.-Dec. 2008)

Q.10 What are the three differential amplifier configuration? Briefly compare and contrast

these configurations. (April-May 2008)

Q.11 What is a feedback? List two types of feedback. Which type is used in linear

applications? (April-May 2008)


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Q.12 What do you mean by zero crossing detector? Explain the zero crossing detector as a

time markers generator from a sine wave. (Nov.-Dec. 2007)

Q.13 Explain the working and different uses of Bootstrap Amplifier. (Nov.-Dec. 2007)

Q.14 Explain the operation of integrator with its derivation and waveform. (April-May 2013)

Q.15 Describe the operation of summer circuit. (April-May 2013)Q.16 Design a practical integrator circuit with DC gain of 10, to integrate a square wave of

10 KHz ? (Nov.-Dec. 2012)

Q.17 Prove that: Vo= - (ER)/ (R1+ Rref ) (Nov.-Dec. 2012)

Q.18 Design a three op-amp instrumentation amplifier to vary a gain from 1 to 10000.

(Nov.-Dec. 2012)

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UNIT-3

Two Marks

Q.1What is the need of voltage sweep generator ? (April-May 2010)Q.2Define clipper circuit. (April-May 2009)Q.3Explain the terms displacement error and transmission error. (Nov.-Dec. 2008)Q.4What is substitute name of square-wave generator ? (Nov.-Dec. 2012)

Seven Marks

Q.1Explain the operation of square wave generator by drawing the output voltagewaveforms ? (April-May 2010)

Q.2Explain the following :i. High pass RC circuit as differentiator

ii. Low pass RC circuit as integrator. (April-May 2010)Q.3How can high pass RC circuit used as a differentiator? Explain it. (April-May 2009)Q.4Explain the positive clamper circuits with its circuit diagram & waveforms. (April-

May 2009)

Q.5What do you understand by current sweep generator? Write its application also.(April-May 2009)

Q.6Explain the operation of Miller sweep circuit and derive an expression for slopeerror. (Nov.-Dec. 2008)


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Q.7Explain the circuit of Triangular wave generator along with all waveform andderivation of output frequency. (Nov.-Dec. 2008)

Q.8Explain positive and negative clampers along with circuit diagrams. (Nov.-Dec.2008)

Q.9What is thermal drift? How does it affect the performance of an op-amp circuit?(April-May 2008)

Q.10 What is an electrical noise? What precautions can be taken to minimize theeffect of noise on an op-amp circuit? (April-May 2008)

Q.11 Explain the working of series and parallel clipper with suitable diagram. (Nov.-Dec. 2007)

Q.12 What do you mean by voltage sweep generator and current sweep generator.Explain them. Write their application. (Nov.-Dec. 2007)

Q.13 Explain the circuit diagram of triangular wave generator. (April-May 2013)Q.14

What is clamper? Explain the types of clamper. (April-May 2013)

Q.15 Write short notes on Schmitt trigger. (April-May 2013)Q.16 What is difference between comparator and Schmitt trigger ? (Nov.-Dec. 2012)Q.17 Explain the working of negative peak clamper. (Nov.-Dec. 2012)Q.18 Design the triangular wave generator so that fo = 2KHz and Vo (pp) = 7V supply

voltage of op-amp is = 15V. Assume vsat = 14V. (Nov.-Dec. 2012)

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UNIT-4Two Marks

Q.1What is speed up capacitor ? (April-May 2010)Q.2What is multivibrator? (April-May 2009)Q.3What are the methods of triggering? Give name. (Nov.-Dec. 2008)Q.4Name the types of multivibrator. (April-May 2013)Q.5For a particular power supply the load voltage is 10V 0.3V for a line voltage of 230V

10%. Calculate source regulation and percentage source regulation. (Nov.-Dec. 2012)

Seven Marks

Q.1Explain the Schmitt trigger ( Emitter coupled binary) with proper waveform. (April-May2010)

Q.2Explain collector coupled Astable Multivibrator with a proper circuit diagram. AlsoDerive: fo= 1/ (1.38 RC). (April-May 2013, 2010)


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Q.3With circuit diagram, explain the working of Emitter coupled monostable multivibrator.(April-May 2009)

Q.4Write a short note on Commutating Capacitors. (April-May 2013, 2009)Q.5Design an astable multivibrator. The repetition rate is 500 Hz and pulse width is 0.2 ms.

Use two transistors with hfe = 50, Vcc = VBB = 20 V, Rc1 = Rc1= 1K. (April-May 2009)Q.6Explain in detail the significance of commutating capacitors in binary. Derive an

expression for maximum frequency of operation of binary using commutating

capacitors. (Nov.-Dec. 2008)

Q.7Explain the method of improving the resolution of Bistable multivibrators along withthe circuit diagram. (Nov.-Dec. 2008)

Q.8What is the difference between clippers and clampers? Give one application of each.(April-May 2008)

Q.9List one application each in which the 555 can be used as a monostable & astablemultivibrator. (April-May 2008)

Q.10Explain the working of Schmitt trigger with the help of Timer 555 IC. (Nov.-Dec. 2007)Q.11How square wave can be generated with Timer 555 IC? (Nov.-Dec. 2007)Q.12Explain the circuit for gated astable multivibrator. (Nov.-Dec. 2007)Q.13Expalin the circuit diagram of emitter coupled astable multivibrator. (April-May 2013)Q.14Derive the expression for current boosting. (Nov.-Dec. 2012)Q.15Write short notes on : (a) Thermal shutdown (b) Over voltage protection circuit.

(Nov.-Dec. 2012)

Q.16Give the difference between linear and switched mode regulator ? (Nov.-Dec. 2012)

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UNIT-5

Two Marks

Q.1Draw the pin diagram of IC-555. (April-May 2010)Q.2Define regulator. (April-May 2009)Q.3Define Duty cycle. (Nov.-Dec. 2008, April-May 2013)Q.4What is multivibrator ? (Nov.-Dec. 2012)

Seven Marks

Q.1Explain IC-723 as high voltage and low voltage regulator. (April-May 2010)Q.2Explain 555 Timer used as a astable multivibrator with proper functional block diagram.

(April-May 2010)


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Q.3Explain Shunt Regulator using Op-amp. (April-May 2010)Q.4Explain with neat sketch, the working of monostable multivibrator, derive its expression

for pulse width. (April-May 2013, 2009)

Q.5Design an astable multivibrator to generate the output signal with frequency of 1 kHzand the duty cycle of 75%. (April-May 2009)

Q.6Compare between Shunt and Series Regulators. (April-May 2009)Q.7Explain function of 555 Timer in monostable mode. Give proper function block diagram

and waveforms. Obtain the equation T = 1.1 RC, for the pulse duration. (Nov.-Dec.

2008)

Q.8Draw the block diagram of shunt regulator and explain it. (Nov.-Dec. 2008)Q.9Design an adjustable regulator using LM 317 which will satisfy the requirements as

output voltage 7 to 15 V output 1A. (Nov.-Dec. 2008)

Q.10What is voltage regulator? List four different types of voltage regulators. (April-May2008)

Q.11Briefly explain the difference between the two operating modes of the 555 timer.(April-May 2008)

Q.12What are the advantages of the adjustable voltage regulators over the fixed voltageregulator? (April-May 2008)

Q.13 Describe shunt regulator using Op-amp. (Nov.-Dec. 2007)

Q. 14 An exponential sweep results when capacitor is charged from supply voltage V

through resistor. If the peak sweep voltage is Vs, prove that : es = Vs / V . (Nov.-Dec.

2007)

Q.15 Write short notes on any two:

i. Three terminal IC regulatorii. VCO

iii. Protection Circuits. (Nov.-Dec. 2007)Q.16 Mention the applications of astable multivibrator (using IC 555). (April-May 2013)

Q.17 Draw the block diagram of voltage regulators and explain it in brief. (April-May 2013)

Q.18 How the commutating capacitor play important role in multivibrator ? (Nov.-Dec.

2012)

Q.19 Explain the working of collector coupled astable multivibrator with suitable waveform?

(Nov.-Dec. 2012)

Q.20 Describe the working of emitter coupled binary ? (Nov.-Dec. 2012)

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