8. These are classified into two types namely inverting Schmitt trigger and non inverting Schmitt trigger.The inverting Schmitt trigger can be defined as an element of output is connected to the positive terminal of the operational amplifier.Similarly, the noninverting amplifier can be defined as the input signal is given at the negative terminal of the operational amplifier. b) Enhance the output signal ANSWER: (a) To remove noise. To design the circuit of Schmitt trigger with UTP=2.2V and LTP=1V. View Answer, 5. compute the relation between R1 and Rf. Q-19 How many types of Schmitt trigger used? Join our social networks below and stay updated with latest contests, videos, internships and jobs! It has two states either stable or quasi-stable depending on the type of multivibrator. What is the difference between a Binary and Schmitt Trigger? 1, JANUARY 1994 Transactions Briefs CMOS Schmitt Trigger Design I. M. Filanovsky and H. Bakes Abstnrct-CMOS Schmitt trigger design with given circuit thresholds is described. Question: Answer The Following Questions Related To Schmitt Trigger Circuits. View Answer, 2. Use the specification and obtain the output voltage swing for op-amp comparator. 1. 1. What is a multivibrator? 37) In Pulse Position Modulation, the drawbacks are. CRO 0-20 MHz (Dual channel)                                               -           1No. 9. Describe A Comparator. 1. The voltage required to drive the transistor Q1 from ON to OFF is called lower trigger point. Therefore  circuits  which can convert  a slow changing  waveform (long  rise  time)  in to  a  fast  changing  waveform (small  rise  time)  are required. Why Schmitt Trigger is called a squaring circuit? 2. 2. Explain the operation of a Schmitt trigger. Describe What A Schmitt Trigger Circuit Is And Discuss Its Advantage Over The Comparator. 2. Non-inverting Schmitt trigger. Ans: Schmitt trigger differs from binary in that the coupling from the outut of second stage to the input of first stage is missing and the feedback is obtained now through a common emitter resistance RE. ... Why is a Schmitt trigger called a regenerative comparator? b) VO = 9.9v A Schmitt trigger circuit has some hysteresis, which allows the designer to adjust the duty cycle by setting the size of the hysteresis window. ANALOG COMMUNICATION VIVA QUESTIONS WITH ANSWER SET Q1. Which circuit converts irregularly shaped waveform to … Questions about Schmitt Triggers and Comparators Fall 2004 Question 3: Schmitt Trigger Model (24 points) Below is a Schmitt trigger circuit connected to a switch. Study the procedure for conducting the experiment in the lab. To remove noise b. 2. To obtain UTP and LTP values practically. c) 50 mv View Answer, 3. 92. Browse other questions tagged operational-amplifier schmitt-trigger or ask your own question. Viva Questions: 1. R2 =56kΩ , R1 = 100Ω ,Vref = 0v & Vsat = ±14v. Next » This set of Linear Integrated Circuit Multiple Choice Questions & Answers (MCQs) focuses on “Voltage Limiter and Schmitt Trigger”. How to limit the output voltage swing only to positive direction? The comparator gives out its output when the trigger input signal exceeds a particular value as set by the trigger level control. The Overflow Blog Podcast 269: What tech is like in “Rest of World” The level  of  the output changes V1   is  always greater than V2.The differences of these two voltages is known as “Hysteresis”. In which configuration a dead band condition occurs in schmitt trigger 6. ... What is the type of feedback used in an op- amp Schmitt trigger? hp. Inference: Schmitt trigger circuit with the given values is designed; and the response is observed. A Schmitt trigger is a _____. Short notes on zero crossing detector? d) Cannot be determined The voltage required to drive the transistor Q1  from OFF to ON is called upper trigger point. Schmitt trigger questions Mar 28, 2016, 09:53 pm I have several different push buttons in my project and think I'll just use Schmitt triggers to deal … Description. How noise can be eliminated on a given signal using Schmitt Trigger? Ans Schmitt trigger is a type of comparator which uses positive feedback. 2. NO. Resistor (1.2 Kohms                                                                    -           3 No. Dammi. 1. Capacitor (0.1µF)                                                                    -           1 No. 2. c) Reduce the transition effect VIVA Questions: 1. The circuit shown in Fig. Q-18 What do mean by a Schmitt trigger? 7. Ans: A Schmitt trigger is mainly used as an amplitude comparator and as a sqaring circuit. here is complete set of 1000+ Multiple Choice Questions and Answers, Prev - Linear Integrated Circuit Questions and Answers – Comparator, Next - Linear Integrated Circuit Questions and Answers – High Speed & Precision Type Comparator, Linear Integrated Circuit Questions and Answers – Comparator, Linear Integrated Circuit Questions and Answers – High Speed & Precision Type Comparator, Instrumentation Transducers Questions and Answers, Engineering Physics II Questions and Answers, Basic Electrical Engineering Questions and Answers, Analog Communications Questions and Answers, Electronic Devices and Circuits Questions and Answers, Linear Integrated Circuits Questions and Answers, Linear Integrated Circuit Questions and Answers – Open Loop Op-Amp Configuration, Linear Integrated Circuit Questions and Answers – Current to Voltage Converter, Linear Integrated Circuit Questions and Answers – Input Offset Voltage – 3, Linear Integrated Circuit Questions and Answers – 555 Timer as a Monostable Multivibrator, Instrumentation Transducers Questions and Answers – Comparators, Linear Integrated Circuit Questions and Answers – Integrator – 1, Linear Integrated Circuit Questions and Answers – Input Offset Voltage – 1. corresponding input voltage. a) All the mentioned All Rights Reserved. a) VO = 5.8v Feb 22, 2011 #1 Hi guys. The voltage at V A Ans: Schmitt Trigger, Astable Multivibrator, Zero Cross Detector, PLL. 36) In PWM signal reception, the Schmitt trigger circuit is used. b) VUT = -14.63v, VLT= -14.63v Outcomes: After finishing this experiment students are able to Design Schmitt trigger circuit using transistor and they are able to find UTP and LTP. Which circuit converts irregularly shaped waveform to regular shaped waveforms? In this section of Digital Logic Design - Digital Electronics - Sequential Circuits,Flip Flops And Multi-vibrators MCQs (Multiple Choice Questions and Answers),We have tried to cover the below lists of topics.All these MCQs will help you prepare for the various … It is a regenerative comparator. To produce ramp signal c. For synchronization d. None of the above. It is an electronic circuit that adds hysteresis to the input-output transition threshold with the help of positive feedback. Transistor (BC 107)                                                                 -           2 No. 3. Question Answer MCQ Exam ON : Vinegar And Citric Acid . each. Obtain the output voltage at which LOW to HIGH transition occurs and measure the corresponding, input voltage. a) VUT = +14.63v, VLT= +14.63v 3. View Answer, 10. Connect the circuit diagram as shown in circuit diagram. 4. B. Define UTP? THEORY: Schmitt Trigger is also known as Regenerative Comparator. a. Function generator 0- 1MHz                                                    -           1No. c) VUT = VLT= ±14.63v I have to amplify the signal using a schmitt trigger. Scmitt Trigger circuit using NE 555. 4. Ans:A Schmitt trigger is an emitter coupled binary. What is a Schmitt Trigger? The plot below the circuit is the PSpice output from this circuit a) Indicate the trace for node “A” and node “B” on the output plot below (4 points) 2. The circuit has two stable state outputs. 93. Electronic Circuits and Pulse Circuits Lab. What are the applications of Schmitt Trigger? d) Eliminate false output transition c) Sawtooth waveform 3. Inverting Schmitt trigger. d) -25 mv UTP(v1)=V1 –VBE2 +V%u02641=V1-0.1 where V1=VccR2/(R2+Rc+R1). 46 IEEE TRANSACTIONS ON CIRCUITS AND SYSTEMS-1:FUNDAMENTAL THEORY AND APPLICATIONS, VOL.41. What is Schmitt Trigger? Resistors (1kohms, 2.2Kohms, 330ohms                                                            -           1 No. Ans:If a sine wave of amplitude larger than the UTP is fed to a Schmitt trigger, whenever the input rises to V1, the output jumps to V1 and remains at its upper level V1 till the input falls to V2. Hysteresis here means it provides two different threshold voltage levels for rising and falling edge. What are the important CPU registers in the 8085 microprocessor? 3. Detailed course structure for each branch and semister, Previous Semesters Final Exam Question Papers. b) Voltage follower with positive feedback A Schmitt trigger is a circuit which generates an output waveform of a square wave of a particular duty cycle. To practice all areas of Linear Integrated Circuits, here is complete set of 1000+ Multiple Choice Questions and Answers. Electrical Circuits viva questions and answers for freshers and experience top list of viva questions with answers interview questions and answers for EEE. a. Synchronization is required between transmitter and receiver b. Compare these practical values with theoretical values. A noisy signal can be input into a Schmitt trigger and the output will be a clean digital signal. 7. Ans: A Schmitt trigger is mainly used as an amplitude comparator and as a sqaring circuit. 2. The circuit which performs  this operation is known as “Schmitt Trigger”. This is a square wave generator which generate a square based on the positive feedback applied. Assume zener voltage to be 4.78v and voltage drop across the forward biased zener to be 0.7v. Linear Integrated Circuit Questions and Answers – Voltage Limiter and Schmitt Trigger « Prev. Sanfoundry Global Education & Learning Series – Linear Integrated Circuits. I have a problem with an IR sensing photo-diode. 1 is that of an inverting Schmitt Trigger. 1. A comparator will converts sine wave to square but duty cycle can not be varied. 2. Ans:A Schmitt trigger is an emitter coupled binary. Joined Feb 15, 2011 16. As shown in the fig. d) Combination of two rectifier diodes A Schmitt trigger is form of comparator circuit that has hysteresis or different input switching levels to change the output between the two states. a) Differential amplifier with positive feedback Tweet ... Bitable multivibrator (c ) Schmitt trigger (d) None of the above. View Answer, 7. Ans: Schmitt Trigger is called squaring circuit because irrespective of inut signal it produces. What is the difference between a Binary and Schmitt Trigger? Also if the rise  time  of  the input  waveform is long,  it requires  a large  coupling  capacitor. Schmitt trigger convert a sinusoidal signal to a square wave signal. View Answer. It is an active circuit which converts an analog input signal to a digital output signal. Thread starter Dammi; Start date Feb 22, 2011; Search Forums; New Posts; D. Thread Starter. b) Pulse waveform 10. The output will either be at +V sat or –V sat. What is Schmitt Trigger? In digital circuits fast waveforms are required  i.e, the circuit remain in the active region for a very short time (of the order of nano seconds) to eliminate the effects of noise or undesired parasitic oscillations  causing  malfunctions  of  the circuit. 2) a comparator with three trigger points. d) None of the mentioned It can be implemented on several devices, however most commonly on the operational amplifier. In Schmitt  trigger  circuit, the  output  is in one of  the two levels  namely  low  or  high. Participate in the Sanfoundry Certification contest to get free Certificate of Merit. Calculate the maximum positive voltage. View Answer, 6. c) VO = 4.7v To a schmitt trigger in non-inverting configuration an input triangular wave of 1Vp is applied. V1, the output changes to high level. Ans: A Schmitt trigger is mainly used as an amplitude comparator and as a sqaring circuit. d) None of the mentioned [ a] (a) counter (b) Voltage to frequency converter (c) Comparator (d) None of the above. Preparing for Viva voce is a bit challenging since one can't predict the questions the examiner will ask. a) Combination of two zener diodes Apart from the timing functions ,the two comparators of the 555 timer can be used independently for other applications.One example is a Schmitt Trigger shown here. 5. The output -voltage waveform of  Miller Sweep Circuit. A. b) 25 mv 1) a comparator with only one trigger point. 3. What are the circuits used to generate square wave? 6. Ans: The lower triggerinf point is defined as the input voltage at which the transistor Q2 just resumes conduction. 1. When the  input  voltage  is raising  above the UTP (upper threshold point) i.e. View Answer, 8. Ans There are two types Schmitt trigger are used. In this way, a Schmitt trigger operates like a high-gain amplifier that always runs at saturation. 65. A basic op-amp circuit has a zener and rectifier diode connected in the feedback path. In a sine wave or other simple waveform, this normally occurs twice during each cycle. What are the advantages of a Schmitt trigger? What is a Schmitt trigger? The Symmetrical Triggering uses only one trigger input to the input of any one transistor. What is a Schmitt trigger? 1.Design Schmitt trigger circuit to get UTP=5V and LTP=7V for VCC=15V. We need thorough preparation to answer the questions quickly and confidently . A Schmitt trigger circuit is also called a regenerative comparator circuit. (c) For The Circuit Below, V_cc = V_H And -V_cc = V_L Are Set At Plusminus 5V. 5. c) All of the mentioned Regulated Power supply 0-30 V (dual )                                               -           1 No. Schmitt Trigger was invented by Otto Schmitt early 1930’s. Schmitt Trigger Question. a) 0 mv 1. Calculate the hysteresis voltage for the schmitt trigger from the given specification: LTP = V2= VBE(active)+ (V1-V?2) .Re/(aRcth+Re), Where Rcth =(RC1(R1+R2))/( R1+R2+RC1)                       a =R2/(R1+R2), Set UTP = V1  —  0.1  then       2.2= V1  —  0.1    then      V1= 2.3V, But V1= (12X15)/(2.2+1.5+RC1)                      RC1= 4.12Kohms = 4Kohms, Rcth = (4X 103(2.2+1.5))/(2.1+1.2+4.4K) = 1.97Kohms, LTP =V2= VBE(active)+ (V1-V?2) .Re/(aRcth+Re), IB2= VE/RE(1+hfe) = 1.6/330(1+200) = 0.0030A, (VC-output)/IC2 = RC2        --------->                  (12-1)/0.6 = RC2= 18.33%u2126. Schmitt trigger converts any type of waveform into square waveform. The circuit uses a potential divider formed by R1 and R2 to provide a positive DC feedback. View Answer, 4. a) Schmitt trigger Write its expression. Statement for Linked Answer Questions (2 and 3): ... design at Schmitt trigger circuit shown below for high threshold voltage is 0.7 volt and low threshold voltage as 0.5 volt. It converts sinusoidal input into a square wave output. Schmitt trigger circuit helps in varying duty cycle of obtained square wave. Ans: noise can be eliminating by rendering the loop gain of the circuit to precisely unity. Specification: R= 1kΩ; RL=10kΩ; VZ=6v; VSat=±15v (Assume forward bias of zener = 0.7v). Determine the upper and lower threshold voltage 28. List As Much Information As Possible. c) Comparator 94. let op amp is powered with dual supply voltage of +5v, -5v and Vref=5v. Apply a sine wave input   of 15 Vp-p   amplitude and 1 KHz frequency to the circuit, 4. 1. What will be the output waveform, if the upper and lower threshold voltages are 0.25v? c) Comparator with positive feedback a) Square waveform Explain how a Schmitt Trigger converts a sine wave to a square wave? Study the operation and working principle of Schmitt Trigger. For the circuit shown below, obtain output waveform. The circuit is essentially a comparator with positive DC feedback. What are the applications of Schmitt Trigger? A Schmitt trigger exhibits hysteresis when loop gain is ___. What happens if the threshold voltages are made longer than the noise voltages in schmitt trigger? The output remains at its lower level V2 till the input rises to V1. The circuit is designed with a positive feedback and hence will have a regenerative action which will make the output switch levels. 30. This input voltage is called UTP (Upper threshold point), 5. d) None of the mentioned What is monostable multivibrator? Inference: Schmitt trigger circuit with the given values is designed; and the response is observed. A Schmitt trigger (Figure 3.5) is a certain type of logic gate input which is designed to ‘clean up’ a corrupted logic signal.It has two input thresholds, with the ‘positive-going’ higher than the ‘negative-going’. In electronics, a Schmitt trigger is a comparator circuit with hysteresis implemented by applying positive feedback to the noninverting input of a comparator or differential amplifier. Where, zener voltage = 5.1 v and voltage drop across the forward biased zener = 0.7v? Explain how a Schmitt Trigger converts a sine wave to a square wave? Viva Questions: 1. Schmitt Trigger Circuit. View Answer, 9. What are the applications of Schmitt Trigger? Similarly  when  a  falling output  voltage  passes through a voltage  V2  known  as  lower  threshold point (LTP), the output changes to low. What is amplitude modulation? Give the expression for the frequency of oscillations in … 29. The approach is based on studying the transient from one stable state to another when the trigger is in linear operation. Ans: The voltage difference between UTP and LT represented by loop width is called hysteresis. This input voltage is called LTP (Lower threshold point). Now, Obtain the output voltage at which HIGH to LOW transition occurs and measure the. A Schmitt trigger is a comparator (not exclusively) circuit that makes use of positive feedback (small changes in the input lead to large changes in the output in the same phase) to implement hysteresis (a fancy word for delayed action) and is used to remove noise from an analog signal while converting it to a digital one. A Schmitt trigger is . An amplitude comparator and as a sqaring circuit Zero Cross Detector,.! Change the output will either be at +V sat or –V sat op- amp Schmitt trigger & (... Trigger ( d ) None of the above performs this operation is known as “ hysteresis.. The help of positive feedback swing only to positive direction output will be! Only one trigger point 330ohms - 1 No circuit questions and Answers ( forward... Shaped waveform to regular shaped waveforms since one ca n't predict the quickly. 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Triggerinf point is defined as the input waveform is long, it a. ( dual ) - 1No to limit the output waveform of a duty! Can see a list of viva questions and Answers – voltage Limiter and Schmitt trigger comparator gives out output. 9.9V c ) 50 mv d ) None of the output between the two levels namely LOW or HIGH Answers! Generate square wave of a particular value as set by the trigger input the. 46 IEEE TRANSACTIONS on Circuits and SYSTEMS-1: FUNDAMENTAL THEORY and schmitt trigger viva questions, VOL.41 duty cycle of obtained square signal... – Linear Integrated Circuits since one ca n't predict the questions the examiner will ask of... 5.8V b ) voltage Limiter and Schmitt trigger circuit helps in varying duty can! Mcq Exam on: Vinegar and Citric Acid circuit with the given values is designed with a positive and! ) in Pulse Position Modulation, the drawbacks are positive direction one trigger.... Waveform of a particular duty cycle a. synchronization is required between transmitter and receiver b swing only positive... Theory and applications, VOL.41 normally occurs twice during each cycle with schmitt trigger viva questions... Operational-Amplifier schmitt-trigger or ask your own question form of comparator circuit principle of Schmitt trigger ” like a high-gain that... Signal using a Schmitt trigger exhibits hysteresis when loop gain of the waveform! Search Forums ; New Posts ; D. thread starter Dammi ; Start date Feb 22 2011. To OFF is called UTP ( V1 ) =V1 –VBE2 +V % u02641=V1-0.1 where V1=VccR2/ ( ). And -V_cc = V_L are set at Plusminus 5V ) voltage Limiter and Schmitt trigger converts a wave... A particular value as set by the trigger level control ans: Schmitt trigger circuit helps in varying duty.... One ca n't predict the questions quickly and confidently a ) VO = 4.7v d ) None the... Your own question as shown in circuit diagram as shown in circuit diagram as shown circuit! Connect the circuit, 4 is complete set of Linear Integrated Circuits obtained wave. A type of comparator circuit that has hysteresis or different input switching levels to change the voltage... Positive feedback applied one ca n't predict the questions quickly and confidently two either. Low transition occurs and measure the corresponding, input voltage at which the transistor from! In an op- amp Schmitt trigger exhibits hysteresis when loop gain of the.... A sqaring circuit threshold voltage levels for rising and falling edge used to generate square wave signal two levels LOW! On is called hysteresis and stay updated with latest contests, videos internships! ) focuses on “ voltage Limiter c ) Schmitt trigger is also called a circuit... Answers for freshers and experience top list of all possible questions for viva voce of Analog Communication each branch semister! Waveform b ) Pulse waveform c ) VO = 4.7v d ) not... B ) Pulse waveform c ) VO = 5.8v b ) Pulse c... Signal exceeds a particular duty cycle V a THEORY: Schmitt trigger converts any type of used. The output changes V1 is always greater than V2.The schmitt trigger viva questions of these two voltages is known as Schmitt... Top list of viva questions and Answers questions for viva voce of Communication. Input switching levels to change the output voltage at which LOW to HIGH transition occurs and measure the mv. = 7.1v View Answer, 5 rectifier diode connected in the feedback path formed by and... Voltage of +5v, -5v and Vref=5v trigger are used, it a... Between a binary and Schmitt trigger convert a sinusoidal signal to a Schmitt trigger are used lower threshold are... High-Gain amplifier that always runs at saturation coupled binary upper and lower voltages! Converts sine wave input of any one transistor V2 till the input voltage is raising above the UTP ( threshold! Are set at Plusminus 5V voltage Limiter c ) for the circuit is used extensively in timing.... Studying the transient from one stable state to schmitt trigger viva questions when the trigger is mainly used as an amplitude comparator as! Form at which the transistor Q1 from on to OFF is called.. ) - 1 No 1kohms, 2.2Kohms, 330ohms - 1 No at... Transient from one stable state to another when the trigger schmitt trigger viva questions signal exceeds a value!, 2011 ; Search Forums ; schmitt trigger viva questions Posts ; D. thread starter Dammi Start... 15 Vp-p amplitude and 1 KHz frequency to the circuit of Schmitt is... To on is called upper trigger point, it requires a large coupling capacitor wave generator which generate a wave. 1 No course structure for each branch and semister, Previous Semesters Final Exam question Papers lower! Utp and LT represented by loop width is called hysteresis voltage drop across the forward biased zener be... Be input into a square wave output devices, however most commonly on the amplifier! Digital signal has two states, it requires a large coupling capacitor shaped waveform to regular shaped?! Which will make the output voltage swing for op-amp comparator the operation and principle! Convert a sinusoidal signal to a Schmitt trigger circuit with the help of positive feedback applied ) 5. N'T predict the questions the examiner will ask falling edge transistor Q1 just into. Feb 22, 2011 ; Search Forums ; New Posts ; D. thread starter c ) 50 d.