Unit 8 - Understanding Op-Amp Data Sheet

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1 X Courses» Integrated Circuits, MOSFETs, OP-Amps and their Unit 8 - Understanding Data Sheet Announcements Course Ask a Question Progress Mentor Course outline IC Technology IC Technology Technolgy Technolgy Operational Amplifiers Understanding Data Sheet Working of Crystal Oscillators Construction and Operation of UJT Relaxation Oscillators Different Types A project of of Noise an Week 8 Assignment 8 The due date for submitting this assignment has passed. Due on , 23:59 IST. Submitted assignment 1) For LM741 IC, which is a typical operational amplifier Junction Temperature < Operational Temperature Junction Temperature > Operational Temperature Junction Temperature = Operational Temperature Junction Temperature > Operational Temperature 2) The given circuit is simplified Transistor buffer circuit Voltage regulator circuit Equivalent UJT circuit Tunnel diode circuit Equivalent UJT circuit 3) 0.01 V and V are given as common mode input to an op-amp. What should be the optimum CMRR? 10 db 0 db 100 db 2 db 2014 NPTEL - Privacy & Terms - Honor Code - FAQs - In association with 100 db Funded by 1 of 5 Wednesday 16 May :51 PM

2 an Contd an Contd Quiz : Week 8 Assignment 8 Assignment 8 - Solutions Configarations Op-amp Experiments: Op-amp as Filters DOWNLOAD VIDEOS 4) Calculate the Powered bandwidth by of op-amp whose thermal noise is 0.1 nv at room temperature at an 0 points impedance of 50 Ω. 3.6 Hz 50 KHz 54 Hz 36 GHz 3.6 Hz 5) In the circuit shown, assume that the op-amp is ideal. If the gain (Vo/Vm) is -12. The value of R will be 10 Ω 10 kω 1 kω 1 Ω 1 kω 6) An op-amp with slew-rate 6 V/µs and gain of 20 db. If this amplifier has to faithfully amplify sinusoidal signals from dc to 12 khz without introducing any slew rate induced distortion, then the input signal level must not exceed V 75 mv 395 mv 7.95 V 7.95 V 7) Given the stages of the op-amp, arrange them in an appropriate order. Consider the flow from input stage to output stage. 1. Differential amplifier stage 2. Level shifting stage 3. Impedance matching stage 4. Voltage gain stage 4, 3, 2, 1 1, 2, 3, 4 2, 1, 4, 3 1, 4, 2, 3 1, 4, 2, 3 2 of 5 Wednesday 16 May :51 PM

3 8) For the UJT oscillator circuit given, consider Rbb = 5 kω, η = 0.6, Vv=1V, Iv= 10 ma, Ip= 10 µa. Compute the range of R1 to switch-on and off the UJT 400 kω>r1>101 Ω 401 kω>r1>1.1 kω 101 kω>r1>401 kω 1.1 kω>r1>400 Ω 401 kω>r1>1.1 kω 9) In continuation to the previous question 8, compute frequency of oscillation if RB1 = 100 Ω during discharge phase of the capacitor C Hz Hz khz khz Hz 10) In a Quartz Crystal Microbalance (QCM) sensor, given quartz crystals Q1, Q2 and Q3 of 0.8 mm, 0.2 mm and 1 mm thickness respectively. Which of these crystals should produce the maximum frequency? Q3, 1 mm Q1, 0.8 mm Q2, 0.2 mm Q2, 0.2 mm 11) How many operational amplifiers does LM324 IC have? 1 Operational amplifier 6 Operational amplifiers 4 Operational amplifiers 2 Operational amplifiers 4 Operational amplifiers 12) 3 of 5 Wednesday 16 May :51 PM

4 Which among the following statements is not valid for shot noise 1. It is associated with current flow 2. It is dependent on temperature 3. It has non-uniform power density 4. It is present in any conductors Statements 2 and 3 Statements 3 and 4 Statements 1 and 2 Statements 1 and 4 Statements 2 and 3 13) In LM741 IC the pin numbers 1 and 5 are used to 1. Eliminate the offset voltage 2. Balance the input voltages Only 1 is true Only 2 is true None Both 1 and 2 is true Both 1 and 2 is true 14) The flicker noise Increases with increase in frequency Increases with decrease in frequency Dose not depend on frequency Decreases with decrease in frequency Increases with decrease in frequency 15) Suppose you have three TL082 chip manufactured by Texas Instruments. You have to implement the circuit with an output, If you want to build the circuit by using minimum number of IC, how many TL082 will be required? Cannot determine 4 of 5 Wednesday 16 May :51 PM

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