mcq on ic 741

The popular IC 741 … Multiple Choice Questions and Answers By Sasmita January 9, 2020 Multiple Choice Questions and Answers on Op-Amp ( Operational Amplifier ) In addition to reading the questions and … These short solved questions … Therefore, quality factor is a measure of selectivity which infers that the selectivity of the filter depends on the value of 'Q'. The transient response affects the settling time while slew rate give rise to distortion if exceeded. MCQ Estimating MCQ Fertilizer Tech MCQ Fluid Mechanics MCQ Furnace Tech. The 741 … Materials like cadmium sulphide and silicon are used for photo conductive cells to greater extent since their conductivity is a function of incident radiant energy. A 741 C contains (A) Distortion resistors (B) Inductors (C) Active load resistors (D) A large coupling capacitor . a) Explain IC 741 along with its Pin Diagram and ideal Characteristics of Op-amp. It was first manufactured by Fairchild semiconductors in the year 1963. However, this type of transistor array ultimately leads to acquire the thermal stability and the requisite amount of collector current in a current mirror circuit.Due to simplicity in fabrication and operation, current mirror circuit have wide range of applications in the aspects of differential and operational amplifiers. This is MCQ Test with 12 Questions. Explanation: CA3086 play a significant role in proper execution or operation of the circuit during the construction of mirror circuit. Explanation: Generation of clipping circuit using op-amp & rectifier diode is possible where the op-amp act as a voltage follower with diode in a feedback path. Due to this, they offer maximum stability & predictability but are very expensive similar to that of ferrite EI, U & toroid cores. Jobs in Pakistan, Karachi, … Which among the following is a military grade op-amp IC? a. IC 555 b. 14. Since bandwidth is a small signal phenomenon, it represents the band of frequencies for which the gain remains constant & also highly dependable on compensating components including closed loop gain. In this section of Electronic Devices and Circuits.It contain Operational Amplifiers (OP AMPS) MCQs (Multiple Choice Questions Answers).All the MCQs (Multiple Choice Question Answers) requires in depth reading of Electronic Devices and Circuits Subject as the hardness level of MCQs … However, the value of external resistor has an efficiently high value to swamp the consequences of emitter resistor of amplifier. The Barkhausen criterion for an oscillator. The pairs mentioned in the question clarifies this conceptual notion in the form of an illustration where the manufactures & their associated IC designations are mentioned. 15. If an input is in the form of a sinusoidal waveform then the output will generate a cosine waveform due to direct relationship of output voltage and negative negative integral of input voltage. When the difference of … IC LF 398 forms a leading part of sample & hold circuit while IC LM117 can be used as a switching regulator & also provides full overload protection to other ICs. In case of non-inverting amplifier, the input is applied to non-inverting input terminal & inverting terminal is set to be grounded while in case of inverting amplifier, the input is applied to inverting terminal & non-inverting terminal is at ground level. 7. Q.183.For IC 741 typical value of input offset current is—————- ... ELECTROMAGNETIC FIELD THEORY 69 IMPORTANT EXPECTED MCQ … It is an 8 pin IC. All these major shortcomings were tackled by an internally compensated op-amp IC741 which had a provision of short-circuit protection, absence of latch-up problem & highly stable & proficient at the operational level. Explanation: Microprocessor interfacing is an application of ADCs while all the remaining applications like microcomputer interfacing, programmable power supply & CRT graphics are the applications concerned to digital to analog converters in accordance to their functionalities. For an instance, twin-T network. Other ICs mentioned in the question are only applicable to certain specific sort of applications other than the military ones. Hence, it is obligatory to use the level shifter in OP-Amps. Explanation: Narrow & Wide band-pass filters can be distinguished only on the basis of quality factor. The 741 … Hence, this scaling amplifier is also referred as 'Weighted Amplifier'. ... c. IC LM 117 d. IC 741. Below enlisted are the steps to evaluate filter components of second order low pass filter for designing purpose.Step 1 : Assume R2 = R3 = R & C1 = C2 = C. Step 2 : Select the value of C = 1μ F Suppose that C1 = C2 = C = 0.0047μ F Step 3 : Determine R by using formula R = 1 / 2 π fH CR2 = R3 = 1 / (2 π x 103 x 47 x 10-10) = 33.86k Ω (consider the round figure value i.e. As a result, bandwidth reduces the output voltage when it is exceeded. The Clipping Amplifier Circuit. Explanation: Since the value of high cut- off frequency is mentioned. Which are interchanged between the positive value and negative value, hence this is the one way of presenting the common emitter amplifier circuit to function between two peak values. Explanation: The inceptional phase of first generation was initiated with the utility of IC op-amp 709. Choose the letter of the best answer in each questions. Can we use IC 741 for high frequency applications? Eventually, the parameter of settling time is totally not involved in comparators. Thus, all pass filters are the means for compensating these phase changes, because of which they are generally termed as “Phase-Correctors” or “Delay Equalizers”. Intermediate stage is basically a differential amplifier which is driven by the previous state output. This is the Clipping Amplifier Circuit using LM741(popular op-amp IC… Explanation: Level shifter or translator is usually connected in a typical Op-Amp so as to shift the DC Level at the output of intermediate stage which is grounded onward to zero. Explanation: No explanation is available for this question! There is a capacitor withinor outside of an op-ampto prevent oscillation. _____ multivibrator is a square wave oscillator. Explanation: The comparator can be configured to be useful in the form of Zero-Crossing Detector by just adjusting reference voltage to zero. Explanation: Channel separation is a measure of the amount of electrical coupling between the op-amps which are integrated on a semantic chip. Many amplifiers have a slight output voltage due to temperature changes in the components. 1. Hence, this is the major drawback because of which it is highly impossible to use Op-amps with open loop configurations in linear circuit applications. Apart from this, average circuit produces the output voltage by considering the average of all input voltages. Objective: To study the working of op-amp … There is sometimes possibility that low frequency signal may consume some more time to cross zero volt because of which output voltage cannot switch over instantaneously from one saturation region to another. For an instance, Op-amp 741 is originally developed by Fairchild but it also gets manufactured by different number of manufacturers under the category of their own designations. Therefore, hysteresis can be evaluated as a difference of upper threshold voltage (Vut) and lower threshold voltage (Vlt.). Semiconductor strain gauges are sensitive to maximum extent as compared to that of wire type & hence they yield more accuracy and resolution. Powdered permalloy toroids possess are highly permeable with lower values of leakage inductance & losses. Explanation: Comparator is a circuit which performs comparison between the signal voltage on one input of Op-amp with reference voltage on another input. The 741 Op Amp IC is a monolithic integrated circuit, comprising of a general purpose Operational Amplifier. This set of Linear Integrated Circuit Multiple Choice Questions & Answers (MCQs) focuses on “Ideal Operational Amplifier”. All Rights Reserved. ANSWER: IC 741. When Vin Vref, then reference voltage is higher at the negative input as compared to that of the positive input. So, as the temperature level range display variations, the op-amp IC741 are further sub-categorized under the series of 741C, 741A & 741E & so on. Explanation: (a) By applying voltage -divider rule, initial voltage at terminal 5 is given by,Vc = (20K) (15) / 11.5K = 26.09 VThus, the frequency of output waveform (nominal frequency) is approximated by,fo ≈ 2(+V - Vc) / R1C1 (+V) = 2 (15 – 10.43) / (20K x 10-9) x (15) = 30.47 kHz (b) Thus, the modulation in the output frequencies can be calculated by initially substituting Vc = 10V & then 11.5 Vfo = 2 (15 – 10) / 20K x 10-9 x 15 = 33.34 kHz fo = 2 (15 – 11.5) / 20K x 10-9 x 15 = 23.34 kHzHence, the variation in an output frequency can be evaluated by the difference between these both frequencies.i.e. Narrow band-reject filter is commonly known as notch filter since it has high quality factor (Q>10) & bandwidth is very much smaller as compared to that of wide band-reject filters. High level signal does not need to get amplify & therefore, instrumentation amplifiers are targeted to amplify low level signals semantically where there is necessity of low noise, low thermal & time drifts, high input resistance & precise closed-loop gain. Explanation: In accordance to given data, the ac input resistance of the amplifier can be given by,Rif = (R2)¦(R3)¦ [Ri (1+AB)]When [Ri (1+AB)] >> R2 or R3 then, the above equation becomesRif ≈ (R2)¦(R3) ≈ 200K ¦ 200K = 100K ΩThe low frequency cut-off limit can be exaggerated usingfL = 1 / [2 πCi(RiF + R0)] = 1 / [2 π (0.1 x 10 -6) (100K +40 )] = 62.8 HzThe gain of an amplifier is = 1 + (Rf / R1) = 1 + (2M / 100K) = 21From the formula of Unity gain bandwidth,UGB = Af x FH Therefore, fH = UGB / Af = 1 M / 21 = 47.61 KhzBandwidth = FH – FL = 47.61 Khz – 0.0476 KHz = 47.56 KHz &Ideal Maximum Output Voltage Swing = +Vcc = +20Vpp. The pin configuration of IC 741 … In this article, we are going to learn about the internal circuit of an op amp IC. The op amp IC we are going to discuss about here is IC 741. Ferrite EI, U & toroid cores exhibits lower performance in the aspects of permeability, high temperature & expensive to greater extent. Due to this reason, the output gets switched between the positive and negative saturation levels. On the other hand, the time required for rising the logic threshold voltage at the output after the driving session of strobe terminal is conducted from zero to one logic level. However, variations in these parameters ultimately changes the level of thermal drift (Drift voltage & Drift current). Hence, it is also regarded as 'Second-generation Op-amp'. Voltage Controllers & capacitors are not meant for controlling the amount of offset output voltage in Op-amps. Multiplication of either 'R' or 'C' by the ratio of original cut-off frequency to the new cut-off frequency gives a notion for changing the high cut-off frequency. Thus, manufacturers generally holds the original type number in their own IC designation. Explanation: Band-reject filters are those which shows the frequency attenuation in the stop-band while they get passed outside this band. Multiple Choice Questions and Answers on Oscillators. Explanation: For non-inverting mode of an amplifier (voltage series feedback amplifier) 1) Af = AB / 1 + ABBut, B = R1 / (R1 + Rf) = 2 k / (2 k + 20 k) = 1 / 111 + AB = 1 + 400000 x (1 / 11) = 36364.6 Af = 400000 / 3636.4 = 10.99 2) fF = (1 + AB) fo = (36364.6) x 10Hz = 363646 = 36.36 KHz. If the feedback resistor gets replaced by a capacitor in a basic inverting amplifier, then the integrator circuit can be produced. All Rights Reserved. Explanation: Given data :From the circuit, the given values are:Vin = 10V, R = 30K & V1 = 2V We know that load current depends on input voltage resistance R in case of voltage to current converter.Thus, IL = Vin / R = 10V / 30K = 0.3 mAHowever, the output voltage (Vo) of voltage to current converter is given by,Vo = 2 V1 = 2 x 2 = 4V. Therefore, due to the configurational assortments in inverting & non-inverting amplifier, the output voltage & phase level (in or out) also exhibit variations. IC 741 mainly performs mathematical operations like addition, subtraction, division, multiplication, integration, differentiation etc. ANSWER: Infinite output offset voltage when input voltage is zero. Q.182.For IC 741 typical value of input bias current is—————-(a) 10μA (b) 80nA (c) 1mA (d) 30mA. Resistances of photo-conductive cell are noted along with the corresponding light intensities & then the resistances are expressed in terms of ohm while the light intensities are expressed in terms of meter candles (lux). MCQ in Microelectronics ; MCQ in Integrated Circuits components ; MCQ in Characteristics and products (ICs) MCQ in Operational Amplifiers ; MCQ in Multivibrators; Start Practice Exam Test Questions Part 1 of the Series. Explanation: Structural Configuration of a differential amplifier is semantic to wheatstone bridge since the amplification is done between two input signals in exactly similar way just like the outputs of Wheatstone bridge network. Explanation: The significant AC parameters of Op-amp are transient response, bandwidth and slew rate but all of them have different results while becoming excessive. But, in some of the applications like Frequency Modulation (FM), Frequency Shift Keying (FSK) where the frequency needs to be controlled by input voltage. However, only the case of A & C is application from the integrator point of view. However, all these mechanisms are adopted as per the requirement of desired application of switching regulator. ANSWER: Reference voltage must be less than input voltage. It is possible to control the current in the heat-generating circuit with an assistance of relay driven by the temperature controller itself. Generally, there are mainly two types of strain gauges like wired strain gauge & semiconductor strain gauge. Due to this configuration, the dependability of voltage gain which varies in accordance to changes in emitter resistance can be ablated. Explanation: Hysteresis phenomenon is a dead-band condition where the output switches from +Vsat to -Vsat whenever input value becomes greater than the upper threshold voltage. IC 741 has three stages such as differential input, gain, … For use in various applications, In different ways. The op-amp can be corrected easily to compensate for temperature changes. b) In the Circuit Given Below, determine the Output Voltage Op-amp 741 Circit problem The voltage gain of IC 741 is about a. This input voltage performs the functionality of controlling voltage level & hence, precisely referred as 'Control Voltage'. VCO are applicable in conversion of low-frequency signals into audio frequency ranges especially in bio-medical applications EEG (electroencephalograms) & ECG (electrocardiograms). 33.34 - 23.34 = 10 kHz. Only the scaling or (weighted amplifiers) possesses this characteristic of operation that exhibits different weightages at the output. Output of Delay Equalizers can be generated by using Super-position theorem. Set 1; Set 2 ) Post navigation. Explanation: Generally, the time constant helps in determining the frequency of oscillation in any oscillator. The resistance value decreases with an increase in the intensity of incident light & hence the typical value of resistance of photo-conductive cells is absolutely 100 ohm. A bistable multivibrator is a (a) free running oscillator (b) triggered oscillator (c) sawtooth wave generator (d) crystal oscillator Q2. 33k Ω As we know that Rf should be equal to 0.586 x R1, then R1 = 27k Ω)Thus, Rf = 0.586 x 27 = 15.86k Ω By taking into consideration the pot value of about 20k Ω, estimated resistances are R2 = R3 = 33k Ω C2 = C3 = 0.0047μ F R1 = 27k Ω & Rf = 15.8k Ω Step 4 : Since the values of resistors and capacitors are equal , the passband voltage gain must be equal to Af = 1 + (Rf / R1) 1.586However, the gain must satisfy the Butterworth response & hence, the value of R1 must be selected = 100k Ω in order to estimate the value of Rf. This is the Multiple Choice Questions in Operational Amplifiers from the book Electronic Devices and Circuit Theory 10th Edition by Robert L. Boylestad. Crystal Oscillators are stable to maximum extent as compared to that of RC & LC oscillators due to higher figure of merit (Q). Apart from this advantage, external resistor also possesses a beneficiary notion of increasing the linearity range of differential amplifiers. Signetics NE/SE 566 VCO generates the triangular as well as square wave outputs simultaneously as a function of an input voltage. There are different types of transistor amplifiers operated by using an AC signal input. However, these diodes are also called as 'Clamp Diodes'. More the level of sensitivity, high will be the rate of accuracy & resolution. Fig. But, the output voltage is absolutely zero when the input voltage is zero. Pin Diagram of an Op Amp IC. The integrated circuit … I collect a lot of IC-741 circuits or tiny amplifiers using 741 op-amps as main. Hence, they can be sinusoidal if RC components are used while they can be square if LC components are used & even they can be saw-tooth or triangular if crystal oscillator is used. Higher the value of quality factor, more is the selectivity of the filter. As a result, this external resistor is also renowned as 'Swamping Resistor' because of its swamping strategy. Q1. © Copyright 2016. Consequently, some chips have been getting expensive due to students relying too much on one model and manufacturer. Along with that we are also going to learn about the ac equivalent circuit of op amp. Explanation: Open loop configuration of Op-amp may increase the threat of distortion as well as clipping of output signal. When the initial slope of a sine wave is greater than the slew rate ... Computer Science multiple choice questions … Apart from these versions, IC 555 are widely applicable in timers, oscillators & pulse generators. This process is known as the biasing amplifier and it is an important amplifier design to establish the exact operating point of a transistor amplifier which is ready to re… This figure of merit conveys that if 'Q' > 10, the filter is considered to be a narrow band-pass filter whereas if 'Q' < 10, then the filter is considered as a narrow band-pass filter. Even if we used as a comparator the IC still observes the weak signals so t… When an amplifier is overdrive output waveform of voltage and current distortion. Explanation: An ideal Op-Amp has an infinite CMRR, Slew Rate & Bandwidth. Resolution specifies the number of input bits with the valuation in the form of least significant bit (LSB) whereas the settling time implies the requirement of time for DAC output to settle down between positive or negative ½ LSB of the final value of digital input (which is generally zero to full scale). This parameter is specifically highlighted in datasheet specifications of dual & quad Op-amps like μAF772 & μAF774 respectively. Explanation: The thermal drift phenomenon of voltage & current are taken into consideration in accordance to the values of input offset voltage, input bias current & input offset current. Besides these, 741S & 741SC are recommended for military as well as commercial aspects due to high slew rate. What are differential gain and common-mode gain of a differential amplifier? Explanation: Op-amp ICs varying in the version of 741 are highly approved or sanctioned for military grade since the temperature range lies within -55° to 125°C. Multiple Choice Questions on Special-Purpose Op-Amp Circuits. Explanation: Corresponding to the manufacturers own productivity of ICs, they also go for the production of one another's renowned ICs. MCQ Heating MCQ Highway Engineering MCQ HMT MCQ Hydraulic M/c MCQ Hydrology MCQ IC Engines MCQ Induction MCQ Induction Motors MCQ Inductors MCQ Industrial Drives MCQ Industrial Engg MCQ Instrumentation MCQ Irrigation Engg MCQ Language Processors MCQ Linux MCQ … ANSWER: Unit change in R per unit change in 'l'. 1. No, IC741 has a low slew rate. So, it is wide used in low-voltage switching regulators. Another name of VCO is Voltage to frequency converter.For e.g. Study the pin diagram and functioning of each pin of IC 741. There are two types of op-amp based waveform generators − Square wave generator; Triangular wave generator; This … Op Amp Multiple Choice Questions & Answers for competitive exams. ANSWER: R2, R3 = 33k Ω, C1 = C2 = 0.0047μ F, R1 = 27k Ω & Rf = 15.8k Ω. Why slew rate is not infinite in Ideal op-amp? ELECTRONICS IMPORTANT MCQ PDF 6 FOR BEL PROBATIONARY ENGINEERS EXAM 2017. Whenever there is an application of signal to input of only one op-amp, then some of the other signal appears on the output confined level of other op-amps due to physical vicinity of op-amps in dual and quad form of packages.However, the amplitudes of all these signal are almost similar and therefore, can be evaluated with an assistance of channel separation. The Following Section consists of Multiple Choice Questions on Basic Op-Amp Circuits. Determine the output from the following circuit a) 180 o in phase with input … ANSWER: Adjusted Output from signal amplifier is directly proportional to the measured quantity. Explanation: Typical electrical parameters of comparator include positive & negative output levels, strobe current & strobe release time, response time & saturation voltage. Capacitor discharge interval in monostable circuits is known as (a) refresh time (b) recovery time (c) dynamic time (d) static time Q3. Explanation: Temperature control circuit can be built up by using a thermistor in bridge circuit along with the replacement of a meter by a relay in the structural configuration of differential instrumentation amplifier. © Copyright 2016. The significant advantage of hysteresis is that it increases the speed of operation of the comparator. Even, phase constant is not involved in case of differentiator & integrator. Explanation: The type of waveform generation by an oscillator totally depends on components used in the circuit. This can only be possible when all input resistances belong to the different values. If you are looking for a reviewer in … An op-amp is a direct coupled high gain … Explanation: Photo-conductive cells can be categorized under the family of photo-detectors which shows variation in the resistance due to incidence of light or any other form of radiant energy. The number 741 indicates that this operational amplifier IC … The DC Level at the output of intermediate stage is good above ground potential in case of direct coupling. When signals undergo transmission by telephone wires, there is a definite change in phase. All the mentioned parameters tend to infinity except output voltage & resistance so that it becomes feasible for an output to drive infinite number of other devices. Notch filter finds its applications in the aspects of communication & biomedical instruments so as to remove the unwanted frequencies. Q2. Fig. … Harikesh Yadav May 30, 2017 ECE MCQ PDF, General. it is limit size value. Explanation: Silicon steel EI butt stack method shows better permeability & high flux density along with the simplicity in construction phase. Study how an integrator and a differentiator work. Explanation: All-pass filters allows to pass all the frequency components of input signal without any attenuation by anticipating phase shifts for different frequencies. Thus, the interval between input step function & the duration of crossing logic threshold voltage at the output gives the conceptual idea of response time. Explanation: The leading role of an instrumentation amplifier signifies is the amplification & magnification of low level signals in order to drive the display or an indicator. So, as the … ic engines objective questions and answers part1; ... Q1.

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