Joined Feb 15, 2011 16. Inverting Schmitt trigger. 1. Transistor (BC 107)                                                                 -           2 No. View Answer, 5. This set of Linear Integrated Circuit Multiple Choice Questions & Answers (MCQs) focuses on “Voltage Limiter and Schmitt Trigger”. a) All the mentioned The circuit uses a potential divider formed by R1 and R2 to provide a positive DC feedback. What are the applications of Schmitt Trigger? Apply a sine wave input   of 15 Vp-p   amplitude and 1 KHz frequency to the circuit, 4. c) VO = 4.7v Where, zener voltage = 5.1 v and voltage drop across the forward biased zener = 0.7v? 1.Design Schmitt trigger circuit to get UTP=5V and LTP=7V for VCC=15V. 2. d) None of the mentioned It can be implemented on several devices, however most commonly on the operational amplifier. 7. To obtain UTP and LTP values practically. 2. Explain how a Schmitt Trigger converts a sine wave to a square wave? Question Answer MCQ Exam ON : Vinegar And Citric Acid . Outcomes: After finishing this experiment students are able to Design Schmitt trigger circuit using transistor and they are able to find UTP and LTP. 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. What is the difference between a Binary and Schmitt Trigger? 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. All Rights Reserved. c) 50 mv ANSWER: (a) To remove noise. Connect the circuit diagram as shown in circuit diagram. Ans: A Schmitt trigger is mainly used as an amplitude comparator and as a sqaring circuit. Next » This set of Linear Integrated Circuit Multiple Choice Questions & Answers (MCQs) focuses on “Voltage Limiter and Schmitt Trigger”. How noise can be eliminated on a given signal using Schmitt Trigger? 2) a comparator with three trigger points. Why Schmitt Trigger is called a squaring circuit? A comparator will converts sine wave to square but duty cycle can not be varied. 3. Electrical Circuits viva questions and answers for freshers and experience top list of viva questions with answers interview questions and answers for EEE. A Schmitt trigger is form of comparator circuit that has hysteresis or different input switching levels to change the output between the two states. b) Voltage follower with positive feedback d) None of the mentioned A Schmitt trigger is a circuit which generates an output waveform of a square wave of a particular duty cycle. It is an electronic circuit that adds hysteresis to the input-output transition threshold with the help of positive feedback. 93. Schmitt Trigger was invented by Otto Schmitt early 1930’s. What are the important CPU registers in the 8085 microprocessor? This is a square wave generator which generate a square based on the positive feedback applied. Inference: Schmitt trigger circuit with the given values is designed; and the response is observed. View Answer, 8. Ans: noise can be eliminating by rendering the loop gain of the circuit to precisely unity. Write its expression. 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. How noise can be eliminated on a given signal using Schmitt Trigger? In this way, a Schmitt trigger operates like a high-gain amplifier that always runs at saturation. d) Cannot be determined The voltage at V A The level  of  the output changes V1   is  always greater than V2.The differences of these two voltages is known as “Hysteresis”. 3. A. Compare these practical values with theoretical values. 1. View Answer, 7. Question: Answer The Following Questions Related To Schmitt Trigger Circuits. Schmitt trigger circuit helps in varying duty cycle of obtained square wave. 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. THEORY: Schmitt Trigger is also known as Regenerative Comparator. R2 =56kΩ , R1 = 100Ω ,Vref = 0v & Vsat = ±14v. Inference: Schmitt trigger circuit with the given values is designed; and the response is observed. 8085 Microprocessor Lab Viva Questions With Answers 1. corresponding input voltage. b) Enhance the output signal This input voltage is called LTP (Lower threshold point). b) Pulse waveform 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 output -voltage waveform of  Miller Sweep Circuit. Viva Questions: 1. What are the circuits used to generate square wave? 6. Ans There are two types Schmitt trigger are used. 37) In Pulse Position Modulation, the drawbacks are. Therefore  circuits  which can convert  a slow changing  waveform (long  rise  time)  in to  a  fast  changing  waveform (small  rise  time)  are required. In a sine wave or other simple waveform, this normally occurs twice during each cycle. Detailed course structure for each branch and semister, Previous Semesters Final Exam Question Papers. c) Comparator with positive feedback Sanfoundry Global Education & Learning Series – Linear Integrated Circuits. Study the procedure for conducting the experiment in the lab. 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. What are the applications of Schmitt Trigger? What is the difference between a Binary and Schmitt Trigger? Q-19 How many types of Schmitt trigger used? Capacitor (0.1µF)                                                                    -           1 No. Q-18 What do mean by a Schmitt trigger? 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’. Also if the rise  time  of  the input  waveform is long,  it requires  a large  coupling  capacitor. Ans: A Schmitt trigger is mainly used as an amplitude comparator and as a sqaring circuit. 3. ... Why is a Schmitt trigger called a regenerative comparator? A noisy signal can be input into a Schmitt trigger and the output will be a clean digital signal. It is a regenerative circuit that is used extensively in timing applications. It is an active circuit which converts an analog input signal to a digital output signal. What is a multivibrator? How to limit the output voltage swing only to positive direction? What are the applications of Schmitt Trigger? a) Differential amplifier with positive feedback Here you can see a list of all possible questions for Viva voce of Analog Communication. Function generator 0- 1MHz                                                    -           1No. Tweet ... Bitable multivibrator (c ) Schmitt trigger (d) None of the above. 6. To practice all areas of Linear Integrated Circuits, here is complete set of 1000+ Multiple Choice Questions and Answers. Which circuit converts irregularly shaped waveform to … Scmitt Trigger circuit using NE 555. 5. Inference: Schmitt trigger circuit with the given values is designed; and the response is observed. CRO 0-20 MHz (Dual channel)                                               -           1No. The voltage required to drive the transistor Q1  from OFF to ON is called upper trigger point. 7. Explain the operation of a Schmitt trigger. The output remains at its lower level V2 till the input rises to V1. 1. hp. I have to amplify the signal using a schmitt trigger. 3. 10. Similarly  when  a  falling output  voltage  passes through a voltage  V2  known  as  lower  threshold point (LTP), the output changes to low. Join our social networks below and stay updated with latest contests, videos, internships and jobs! 4. View Answer, 9. View Answer, 4. 30. I have a problem with an IR sensing photo-diode. What will be the output waveform, if the upper and lower threshold voltages are 0.25v? 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. A Schmitt trigger exhibits hysteresis when loop gain is ___. ANALOG COMMUNICATION VIVA QUESTIONS WITH ANSWER SET Q1. b) Combination of zener and rectifier diode Non-inverting Schmitt trigger. 92. When the  input  voltage  is raising  above the UTP (upper threshold point) i.e. b) VUT = -14.63v, VLT= -14.63v The output will either be at +V sat or –V sat. The circuit has two stable state outputs. Give the expression for the frequency of oscillations in … We need thorough preparation to answer the questions quickly and confidently . A Schmitt trigger is . What are the applications of Schmitt Trigger? Determine the upper and lower threshold voltage What happens if the threshold voltages are made longer than the noise voltages in schmitt trigger? 1. Why Schmitt Trigger is called a squaring circuit? 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. 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. Viva Questions: 1. 94. 4. b) Voltage limiter ... What is the type of feedback used in an op- amp Schmitt trigger? [ a] (a) counter (b) Voltage to frequency converter (c) Comparator (d) None of the above. (c) For The Circuit Below, V_cc = V_H And -V_cc = V_L Are Set At Plusminus 5V. 46 IEEE TRANSACTIONS ON CIRCUITS AND SYSTEMS-1:FUNDAMENTAL THEORY AND APPLICATIONS, VOL.41. Ans Schmitt trigger is a type of comparator which uses positive feedback. Participate in the Sanfoundry Certification contest to get free Certificate of Merit. Specification: R= 1kΩ; RL=10kΩ; VZ=6v; VSat=±15v (Assume forward bias of zener = 0.7v). 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. c) VUT = VLT= ±14.63v 2. Ans:A Schmitt trigger is an emitter coupled binary. Ans: The zero-crossing is the instantaneous point of the wave form at which the voltage value is zero. 1. Ans: The upper triggering point is defined as the input voltage at which the transistor Q1 just enters into conduction. A Schmitt trigger is a _____. 2. Short notes on zero crossing detector? It has two states either stable or quasi-stable depending on the type of multivibrator. d) None of the mentioned Calculate the hysteresis voltage for the schmitt trigger from the given specification: Explain how a Schmitt Trigger converts a sine wave to a square wave? What is monostable multivibrator? Describe A Comparator. Study the operation and working principle of Schmitt Trigger. It converts sinusoidal input into a square wave output. Description. A basic op-amp circuit has a zener and rectifier diode connected in the feedback path. View Answer, 3. 1. To design the circuit of Schmitt trigger with UTP=2.2V and LTP=1V. Ans:A Schmitt trigger is an emitter coupled binary. Hysteresis here means it provides two different threshold voltage levels for rising and falling edge. UTP(v1)=V1 –VBE2 +V%u02641=V1-0.1 where V1=VccR2/(R2+Rc+R1). Schmitt trigger convert a sinusoidal signal to a square wave signal. a) 0 mv a. Synchronization is required between transmitter and receiver b. a) Schmitt trigger What is amplitude modulation? c) All of the mentioned Linear Integrated Circuit Questions and Answers – Voltage Limiter and Schmitt Trigger « Prev. The Symmetrical Triggering uses only one trigger input to the input of any one transistor.

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