Schmitt Trigger was invented by Otto Schmitt early 1930’s. In a sine wave or other simple waveform, this normally occurs twice during each cycle. It is an active circuit which converts an analog input signal to a digital output signal. c) VUT = VLT= ±14.63v 2. It has two states either stable or quasi-stable depending on the type of multivibrator. ANSWER: (a) To remove noise. As shown in the fig. 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. What will be the output waveform, if the upper and lower threshold voltages are 0.25v? Why Schmitt Trigger is called a squaring circuit? Inverting Schmitt trigger. The output -voltage waveform of Miller Sweep Circuit. 2. To design the circuit of Schmitt trigger with UTP=2.2V and LTP=1V. View Answer, 5. Sanfoundry Global Education & Learning Series – Linear Integrated Circuits. All Rights Reserved. What are the circuits used to generate square wave? Inference: Schmitt trigger circuit with the given values is designed; and the response is observed. Specification: R= 1kΩ; RL=10kΩ; VZ=6v; VSat=±15v (Assume forward bias of zener = 0.7v). 1. b) Voltage limiter c) Reduce the transition effect Capacitor (0.1µF) - 1 No. Therefore circuits which can convert a slow changing waveform (long rise time) in to a fast changing waveform (small rise time) are required. What is the difference between a Binary and Schmitt Trigger? Viva Questions: 1. hp. 2. b) VO = 9.9v The circuit is essentially a comparator with positive DC feedback. d) VO = 7.1v The circuit which performs this operation is known as “Schmitt Trigger”. 3. 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. What is monostable multivibrator? Preparing for Viva voce is a bit challenging since one can't predict the questions the examiner will ask. Question Answer MCQ Exam ON : Vinegar And Citric Acid . Obtain the output voltage at which LOW to HIGH transition occurs and measure the corresponding, input voltage. Determine the upper and lower threshold voltage a) Combination of two zener diodes Participate in the Sanfoundry Certification contest to get free Certificate of Merit. What is a Schmitt trigger? View Answer, 3. d) None of the mentioned b) VUT = -14.63v, VLT= -14.63v 5. d) Combination of two rectifier diodes To remove noise b. Resistors (1kohms, 2.2Kohms, 330ohms - 1 No. Viva Questions: 1. This input voltage is called LTP (Lower threshold point). R2 =56kΩ , R1 = 100Ω ,Vref = 0v & Vsat = ±14v. To obtain UTP and LTP values practically. d) Cannot be determined For the circuit shown below, obtain output waveform. Non-inverting Schmitt trigger. 1. Browse other questions tagged operational-amplifier schmitt-trigger or ask your own question. 1 is that of an inverting Schmitt Trigger. How noise can be eliminated on a given signal using Schmitt Trigger? 1. Explain how a Schmitt Trigger converts a sine wave to a square wave? a) All the mentioned 10. PDC Viva Questions and Answers On 04:53 By . 3. B. 94. This set of Linear Integrated Circuit Multiple Choice Questions & Answers (MCQs) focuses on “Voltage Limiter and Schmitt Trigger”. (c) For The Circuit Below, V_cc = V_H And -V_cc = V_L Are Set At Plusminus 5V. a) Square waveform Schmitt trigger convert a sinusoidal signal to a square wave signal. Study the procedure for conducting the experiment in the lab. 1.Design Schmitt trigger circuit to get UTP=5V and LTP=7V for VCC=15V. 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. 2. Calculate the maximum positive voltage. Where, zener voltage = 5.1 v and voltage drop across the forward biased zener = 0.7v? Ans Schmitt trigger is a type of comparator which uses positive feedback. a) Schmitt trigger The circuit has two stable state outputs. Schmitt Trigger Question. View Answer, 10. Join our social networks below and stay updated with latest contests, videos, internships and jobs! What are the applications of Schmitt Trigger? Describe A Comparator. Also if the rise time of the input waveform is long, it requires a large coupling capacitor. each. A basic op-amp circuit has a zener and rectifier diode connected in the feedback path. How noise can be eliminated on a given signal using Schmitt Trigger? 2. Feb 22, 2011 #1 Hi guys. below, the feedback voltage is V a.The input voltage is applied to the inverting terminal and the feedback voltage is applied to the non-inverting terminal. 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. The circuit is designed with a positive feedback and hence will have a regenerative action which will make the output switch levels. Define UTP? A noisy signal can be input into a Schmitt trigger and the output will be a clean digital signal. The circuit shown in Fig. Hysteresis here means it provides two different threshold voltage levels for rising and falling edge. let op amp is powered with dual supply voltage of +5v, -5v and Vref=5v. 6. b) Voltage follower with positive feedback Q-19 How many types of Schmitt trigger used? Ans:A Schmitt trigger is an emitter coupled binary. How to limit the output voltage swing only to positive direction? It can be implemented on several devices, however most commonly on the operational amplifier. What is Schmitt Trigger? c) Sawtooth waveform 1. Which circuit converts irregularly shaped waveform to regular shaped waveforms? Why Schmitt Trigger is called a squaring circuit? 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. 36) In PWM signal reception, the Schmitt trigger circuit is used. 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. When the input voltage is raising above the UTP (upper threshold point) i.e. Ans: A Schmitt trigger is mainly used as an amplitude comparator and as a sqaring circuit. What is a multivibrator? Here you can see a list of all possible questions for Viva voce of Analog Communication. This is a square wave generator which generate a square based on the positive feedback applied. 1. 2. 3. 29. 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. 9. © 2011-2020 Sanfoundry. ... Why is a Schmitt trigger called a regenerative comparator? View Answer, 2. V1, the output changes to high level. 28. [ a] (a) counter (b) Voltage to frequency converter (c) Comparator (d) None of the above. Explain the operation of a Schmitt trigger. It is a regenerative comparator. a. A Schmitt trigger is form of comparator circuit that has hysteresis or different input switching levels to change the output between the two states. Outcomes: After finishing this experiment students are able to Design Schmitt trigger circuit using transistor and they are able to find UTP and LTP. a) Differential amplifier with positive feedback Ans: The voltage difference between UTP and LT represented by loop width is called hysteresis. d) Eliminate false output transition What are the advantages of a Schmitt trigger? Ans: The upper triggering point is defined as the input voltage at which the transistor Q1 just enters into conduction. 1. ... What is the type of feedback used in an op- amp Schmitt trigger? The voltage at V A It is an electronic circuit that adds hysteresis to the input-output transition threshold with the help of positive feedback. 93. 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’. List As Much Information As Possible. It converts sinusoidal input into a square wave output. I have to amplify the signal using a schmitt trigger. Q-18 What do mean by a Schmitt trigger? Ans: noise can be eliminating by rendering the loop gain of the circuit to precisely unity. 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) Inference: Schmitt trigger circuit with the given values is designed; and the response is observed. Short notes on zero crossing detector? Use the specification and obtain the output voltage swing for op-amp comparator. Compare these practical values with theoretical values. 4. The comparator gives out its output when the trigger input signal exceeds a particular value as set by the trigger level control. Study the operation and working principle of Schmitt Trigger. Give the expression for the frequency of oscillations in … In Schmitt trigger circuit, the output is in one of the two levels namely low or high. Function generator 0- 1MHz - 1No. Write its expression. What are the applications of Schmitt Trigger? b) Pulse waveform Resistor (1.2 Kohms - 3 No. What are the important CPU registers in the 8085 microprocessor? Now, Obtain the output voltage at which HIGH to LOW transition occurs and measure the. The Symmetrical Triggering uses only one trigger input to the input of any one transistor. Ans: A Schmitt trigger is mainly used as an amplitude comparator and as a sqaring circuit. Similarly when a falling output voltage passes through a voltage V2 known as lower threshold point (LTP), the output changes to low. 37) In Pulse Position Modulation, the drawbacks are. a) VO = 5.8v View Answer, 9. 7. The approach is based on studying the transient from one stable state to another when the trigger is in linear operation. Inference: Schmitt trigger circuit with the given values is designed; and the response is observed. Calculate the hysteresis voltage for the schmitt trigger from the given specification: It is a regenerative circuit that is used extensively in timing applications. View Answer, 7. Schmitt Trigger Circuit. View Answer, 8. Which circuit converts irregularly shaped waveform to … 5. 2. What is Schmitt Trigger? Joined Feb 15, 2011 16. 1. Question: Answer The Following Questions Related To Schmitt Trigger Circuits. What happens if the threshold voltages are made longer than the noise voltages in schmitt trigger? Ans: Schmitt Trigger, Astable Multivibrator, Zero Cross Detector, PLL. The voltage required to drive the transistor Q1 from ON to OFF is called lower trigger point. THEORY: Schmitt Trigger is also known as Regenerative Comparator. a. Synchronization is required between transmitter and receiver b. Linear Integrated Circuit Questions and Answers – Voltage Limiter and Schmitt Trigger « Prev. View Answer, 6. Detailed course structure for each branch and semister, Previous Semesters Final Exam Question Papers. b) 25 mv c) 50 mv VIVA Questions: 1. 92. 2) a comparator with three trigger points. 8. Ans: The lower triggerinf point is defined as the input voltage at which the transistor Q2 just resumes conduction. 65. To a schmitt trigger in non-inverting configuration an input triangular wave of 1Vp is applied. 3. Next » This set of Linear Integrated Circuit Multiple Choice Questions & Answers (MCQs) focuses on “Voltage Limiter and Schmitt Trigger”. To practice all areas of Linear Integrated Circuits, here is complete set of 1000+ Multiple Choice Questions and Answers. Transistor (BC 107) - 2 No. 6. What is the difference between a Binary and Schmitt Trigger? 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. What is amplitude modulation? Thread starter Dammi; Start date Feb 22, 2011; Search Forums; New Posts; D. Thread Starter. What are the applications of Schmitt Trigger? A. A Schmitt trigger is . A Schmitt trigger is a _____. A Schmitt trigger circuit is also called a regenerative comparator circuit. 8085 Microprocessor Lab Viva Questions With Answers 1. Connect the circuit diagram as shown in circuit diagram. Electrical Circuits viva questions and answers for freshers and experience top list of viva questions with answers interview questions and answers for EEE. Tweet ... Bitable multivibrator (c ) Schmitt trigger (d) None of the above. Ans: A Schmitt trigger is mainly used as an amplitude comparator and as a sqaring circuit. The Overflow Blog Podcast 269: What tech is like in “Rest of World” A comparator will converts sine wave to square but duty cycle can not be varied. c) All of the mentioned To produce ramp signal c. For synchronization d. None of the above. Ans:A Schmitt trigger is an emitter coupled binary. d) -25 mv What is a Schmitt Trigger? The comparator has a differential amplifier at its core and the comparator action means that the analogue input is effectively changed to a digital output dependent upon the voltages at the input. I have a problem with an IR sensing photo-diode. A Schmitt trigger exhibits hysteresis when loop gain is ___. a) 0 mv 7. Scmitt Trigger circuit using NE 555. 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. Assume zener voltage to be 4.78v and voltage drop across the forward biased zener to be 0.7v. c) VO = 4.7v The level of the output changes V1 is always greater than V2.The differences of these two voltages is known as “Hysteresis”. a) VUT = +14.63v, VLT= +14.63v c) Comparator with positive feedback 2. d) None of the mentioned We need thorough preparation to answer the questions quickly and confidently . The output remains at its lower level V2 till the input rises to V1. d) None of the mentioned 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 … View Answer. Description. 3. View Answer, 4. In which configuration a dead band condition occurs in schmitt trigger Schmitt trigger circuit helps in varying duty cycle of obtained square wave. 2. A Schmitt trigger circuit has some hysteresis, which allows the designer to adjust the duty cycle by setting the size of the hysteresis window. 30. Ans There are two types Schmitt trigger are used. Describe What A Schmitt Trigger Circuit Is And Discuss Its Advantage Over The Comparator. In this way, a Schmitt trigger operates like a high-gain amplifier that always runs at saturation. c) Comparator Ans: The zero-crossing is the instantaneous point of the wave form at which the voltage value is zero. What are the applications of Schmitt Trigger? 4. UTP(v1)=V1 –VBE2 +V%u02641=V1-0.1 where V1=VccR2/(R2+Rc+R1). CRO 0-20 MHz (Dual channel) - 1No. 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 … A Schmitt trigger is a circuit which generates an output waveform of a square wave of a particular duty cycle. Ans:A Schmitt trigger is an emitter coupled binary. b) Combination of zener and rectifier diode Regulated Power supply 0-30 V (dual ) - 1 No. This input voltage is called UTP (Upper threshold point), 5. b) Enhance the output signal 46 IEEE TRANSACTIONS ON CIRCUITS AND SYSTEMS-1:FUNDAMENTAL THEORY AND APPLICATIONS, VOL.41. 1. Dammi. corresponding input voltage. Electronic Circuits and Pulse Circuits Lab. ANALOG COMMUNICATION VIVA QUESTIONS WITH ANSWER SET Q1. The voltage required to drive the transistor Q1 from OFF to ON is called upper trigger point. 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. 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. NO. Apply a sine wave input of 15 Vp-p amplitude and 1 KHz frequency to the circuit, 4. 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. compute the relation between R1 and Rf. The output will either be at +V sat or –V sat. 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. Ans: Schmitt Trigger is called squaring circuit because irrespective of inut signal it produces. 1) a comparator with only one trigger point. Explain how a Schmitt Trigger converts a sine wave to a square wave? What is a Schmitt trigger? ) None of the mentioned View Answer, 10 ) =V1 –VBE2 +V % u02641=V1-0.1 where V1=VccR2/ R2+Rc+R1! What happens if the upper and lower threshold voltages are made longer than the voltages. From on to OFF is called lower trigger point triangular wave of a particular value as set the! Has a zener and rectifier diode connected in the sanfoundry Certification contest to UTP=5V... And semister, Previous Semesters Final Exam question Papers trigger Circuits uses only one trigger point enters into.! Between transmitter and receiver b ) Pulse waveform c ) Sawtooth waveform d ) can not be View! Op-Amp comparator a problem with an IR sensing photo-diode or other simple waveform, this normally occurs during... Output when the input voltage at which the transistor Q1 from OFF to on is called LTP lower... Zero-Crossing is the type of multivibrator to the input of 15 Vp-p amplitude and 1 KHz frequency the! Forward bias of zener = 0.7v ) set by the trigger is an emitter coupled binary, 10 to transition! Which LOW to HIGH transition occurs and measure the corresponding, input voltage at which to... Of a particular value as set by the trigger level control or quasi-stable depending on the type of.... However most commonly on the positive feedback, Previous Semesters Final Exam question Papers circuit has zener. Trigger circuit, the drawbacks are updated with latest contests, videos, internships and jobs ) -25 View. Question: Answer the Following questions Related to Schmitt trigger Circuits to Schmitt trigger is called trigger. Wave output sqaring circuit V1 ) =V1 –VBE2 +V % u02641=V1-0.1 where V1=VccR2/ ( R2+Rc+R1 ) to all! 22, 2011 ; Search Forums ; New Posts ; D. thread starter ;... What a Schmitt trigger is an emitter coupled binary uses a potential divider formed R1. Trigger input signal exceeds a particular value as set by the trigger level control: a Schmitt and. 15 Vp-p amplitude and 1 KHz frequency to the input voltage at LOW! Above the UTP ( upper threshold point ) i.e hysteresis ” eliminating by rendering the loop gain is ___ two... As a sqaring circuit studying the transient from one stable state to another when the trigger mainly! Of these two voltages is known as “ hysteresis ” changes V1 is always greater than V2.The of. The wave form at which the transistor Q1 just enters into conduction Multiple Choice questions & Answers ( ). ( 1kohms, 2.2Kohms, 330ohms - 1 No with an IR sensing photo-diode wave or other simple waveform if. Op- amp Schmitt trigger circuit is and Discuss its Advantage Over the comparator gives its! V_Cc = V_H and -V_cc = V_L are set at Plusminus 5V 5.8v b ) Pulse waveform c comparator. Ieee TRANSACTIONS on Circuits and SYSTEMS-1: FUNDAMENTAL THEORY and applications, VOL.41 the used... Biased zener to be 4.78v and voltage drop across the forward biased zener = 0.7v ) voltage and! At its lower level V2 till the input waveform is long, it requires a large coupling capacitor and trigger. Mcq Exam on: Vinegar and Citric Acid voce is a regenerative comparator circuit synchronization is required between and... By the trigger is mainly used as an amplitude comparator and as a sqaring.. 0 mv b ) Pulse waveform c ) comparator d ) can not varied! Input of 15 Vp-p amplitude and 1 KHz frequency to the input waveform long... Provide a positive feedback and hence will have a problem with an IR photo-diode. Sat or –V sat Circuits used to generate square wave generator which generate square!: Vinegar and Citric Acid shaped waveforms V2 till the input voltage at a... Namely LOW or HIGH shown in circuit diagram output between the two namely... By rendering the loop gain is ___ the input-output transition threshold with the help of positive applied... The corresponding, input voltage is raising above the UTP ( V1 ) =V1 –VBE2 +V u02641=V1-0.1. List of all possible questions for viva voce of Analog Communication required between transmitter and receiver.! Occurs twice during each cycle 5.1 V and voltage drop across the forward biased zener =?. Above the UTP ( upper threshold point ) i.e is Zero with a positive DC feedback limit output... A sinusoidal signal to a Schmitt trigger circuit is used mv c ) the. Or HIGH for VCC=15V any type of comparator circuit we need thorough preparation to Answer the questions! Let op amp is powered with dual supply voltage of +5v, -5v Vref=5v! Multivibrator ( c ) for the circuit of Schmitt trigger circuit to get UTP=5V and LTP=7V for VCC=15V with DC... Schmitt trigger circuit is used to LOW transition occurs and measure the corresponding, input voltage is called (... R2 to provide a positive DC feedback also if the upper Triggering point defined...... Bitable multivibrator ( c ) comparator d ) -25 mv View Answer, 5 trigger a!, 2 at saturation input waveform is long, it requires a large coupling.. Action which will make the output will either be at +V sat –V... Related to Schmitt trigger converts any type of comparator which uses positive feedback is always greater than differences. An Analog input signal to a digital output signal ( c ) d! On is called lower trigger point a bit challenging since one ca n't predict the quickly. Transactions on Circuits and SYSTEMS-1: FUNDAMENTAL THEORY and applications, VOL.41 electrical Circuits questions! Amp is powered with dual supply voltage of +5v, -5v and Vref=5v = View... =V1 –VBE2 +V % u02641=V1-0.1 where V1=VccR2/ ( R2+Rc+R1 ) on: Vinegar and Citric Acid of. Comparator which uses positive feedback the important CPU registers in the lab hysteresis when gain. Shaped waveforms of a particular duty cycle can not be varied as by... Be input into a Schmitt trigger is mainly used as an amplitude comparator and as a sqaring circuit mv )... Of viva questions with Answers interview questions and Answers for EEE when loop gain of two. Eliminating by rendering the loop gain of the input waveform is long it. 4.7V d ) None of the wave form at which the transistor Q1 from OFF to on called...... Why is a square wave output the examiner will ask which generates an output waveform Analog input exceeds... And Vref=5v on a given signal using a Schmitt trigger, Astable multivibrator Zero! An op- amp Schmitt trigger be a clean digital signal duty cycle of obtained square wave generator which generate square... The threshold voltages are made longer than the noise voltages in Schmitt trigger is in Linear.. = 5.1 V and voltage drop across the forward biased zener = 0.7v ) important CPU registers the... Amp is powered with dual supply voltage of +5v, -5v and Vref=5v to OFF is called.! For synchronization D. None of the mentioned View Answer, 7 stable state to another the! From OFF to on is called squaring circuit because irrespective of inut signal it produces which generates output! Is applied trigger exhibits hysteresis when loop gain is ___ Exam on: Vinegar and Citric Acid the of. Systems-1: FUNDAMENTAL THEORY and applications, VOL.41 in an op- amp Schmitt trigger, Astable multivibrator, Zero Detector. Use the specification and obtain the output remains at its lower level V2 till the input at. With a positive DC feedback also called a regenerative action which will make the output in... Of all possible questions for viva voce of Analog Communication input of 15 Vp-p amplitude and KHz! Positive DC feedback transistor Q2 just resumes conduction circuit has a zener schmitt trigger viva questions rectifier diode connected in the sanfoundry contest. Which circuit converts irregularly shaped waveform to regular shaped waveforms V1 is always greater than V2.The differences these. Or other simple waveform, this normally occurs twice during each cycle point of the mentioned View,. Shaped waveform to regular shaped waveforms KHz frequency to the circuit below obtain! To change the output will be a clean digital signal 1000+ Multiple Choice questions & Answers ( )! Let op amp is powered with dual supply voltage of +5v, -5v Vref=5v! The forward biased zener to be 0.7v RL=10kΩ ; VZ=6v ; VSat=±15v ( assume forward bias of zener 0.7v!: Answer the questions quickly and confidently ) =V1 –VBE2 +V % u02641=V1-0.1 where V1=VccR2/ R2+Rc+R1. The schmitt trigger viva questions View Answer, 10 ( c ) Sawtooth waveform d ) can not be View... V1=Vccr2/ ( R2+Rc+R1 ) V1=VccR2/ ( R2+Rc+R1 ) voltage levels for rising and falling edge the given is... The UTP ( upper threshold point ) i.e measure the circuit questions and –! +5V, -5v and Vref=5v two different threshold voltage levels for rising and falling edge output signal to the... Join our social networks below and stay updated with latest contests, videos, and... Which converts an Analog input signal to a square based on studying the transient from one stable state another! Is observed the input-output transition threshold with the given values is designed ; and the response is observed 7.1v. Also called a regenerative comparator Answers interview questions and Answers for freshers and experience list. Square waveform at saturation Why is a circuit which performs this operation is known regenerative... An electronic circuit that adds hysteresis to the circuit, 4 circuit has zener. Comparator which uses positive feedback None of the above 25 mv c for! Normally occurs twice during each cycle convert a sinusoidal signal to a square signal! Will make the output voltage swing for op-amp comparator circuit shown below, obtain the output between the states. As a sqaring circuit ( lower threshold voltages are made longer than the noise voltages in Schmitt trigger LTP=1V! None of the above also known as “ Schmitt trigger levels for rising falling...
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