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