Integrated Circuits and Systems group, IIT Madras

EE2019: Analog Systems and Lab (Jan-May 2021)

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Instructor: Qadeer Ahmad Khan

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Recorded Lectures

  • Lecture-1: video handout (Introduction to analog systems, applications of analog in real world, course outline and evaluation)
  • Lecture-2: video handout (Basic electrical elements - resistor, capacitor, inductor, independent and dependent/controlled sources, active vs. passive elements, need of non-linear element for amplification, input and output power)
  • Lecture-3: video handout (Types of controlled sources, transistors as VCCS, ideal vs non-ideal sources, VCVS and CCCS using VCCS, using VCCS as an amplifier)
  • Lecture-4: video handout (VCCS as an amplifier and its limitations, concept of negative feedback operation, integrator using VCCS)
  • Lecture-5: video handout (Behavior of an integrator in open and closed loop, constant gain amplifier using integrator, ideal vs. real integrator, error in amplifier output due to finite open loop gain)
  • Lecture-6: video handout (Frequency response of ideal and real integrator, introduction to operational amplifier (op-amp))
  • Lecture-7: video handoput (Op-amp in negative feedback, virtual short in an op-amp, realizing various functions using op-amp - inverting & non-inverting amplifier, integrator, differentiator, low pass filter, high pass filter, adder, supply limited op-amp)
  • Lecture-8: video handout (Supply current in op-amp, Output impedance in negative feedback)
  • Lecture-9: video handout (Input impedance - contd., finding the signs of op-amp for negative feedback)
  • Lecture-10: video handout (finding the signs of op-amp for negative feedback-contd., introduction to schmitt trigger)
  • Lecture-11: video handout (Schmitt trigger using inverting amplifier in positive feedback)
  • Lecture-12: video handout (Oscillator and ramp generator using schmitt trigger, schmitt trigger using non-inverting amplifier in positive feedback and oscillator)
  • Lecture-13: video handout (op-amp offset, output error in amplifier due to offset, dc biasing of signals and op-amp)
  • Lecture-14: video handout (Shifting dc level of signal using RC network, choosing value of RC for signal biasing, biasing of an inverting amplifier)
  • Lecture-15: video handout (Biasing of inverting amplifier - contd., biasing of non-inverting amplifier)
  • Lecture-16: video handout (Generating common mode dc bias voltage, biasing of schmitt trigger and oscillator/ramp generator for unipolar supply, introduction to stability, Barkhausen criterion)
  • Lecture-17: video handout (First order system - single stage op-amp, first order system with ideal and non-ideal integrators, open loop vs closed loop system, stability analysis using impulse response)
  • Lecture-18: video handout (Step response of 1st order system-steady state error, time constant, loop gain analysis, phase margin)
  • Lecture-19: video handout (Revision of steady state error and phase margin, introduction to second order system - two stage opamp)
  • Lecture-20: video handout (Loop gain analysis of 2-stage op-map, effect of loop gain pole locations on phase margin)
  • Lecture-21: video handout (Review of second order system, impulse response vs damping ratio, second order system, pole location vs damping ratio)
  • Lecture-22: video handout (Relationship between damping ratio and phase margin, introduction to dominant pole compensation, finding the dominant pole frequency for a given phase margin)
  • Lecture-23: video handout (Dominant pole compensation, finding the value of compensation capacitor (Cc) for a given phase margin)
  • Lecture-24: video handout (Miller effect, concept of capacitance multiplier, miller compensation of two stage op-amp - loop gain transfer function)
  • Lecture-25: video handout (Finding the poles of miller compensated op-amp)
  • Lecture-26: video handout (Finding the poles of miller compensated op-amp-contd., miller vs. dominant pole compensation, pole splitting and bandwidth (Wu) extension in miller compensation, compensation example - finding the value of Cc)
  • Lecture-27: video handout (Effect of R.H.P. zero in miller compensation, reducing the effect of R.H.P. zero)
  • Lecture-28: video handout (Mitigating the effect of R.H.P. using nulling resistor, converting R.H.P. zero into L.H.P. zero and cancelling the pole, tips and techniques for loop gain analysis - to be contd.)
  • Lecture-29: video handout (Performing loop gain analysis with real op-amp in simulator - why simply breaking the loop and applying input doesn't work with real op-amp, using LC network to set the dc operating point and break the loop, Introduction to voltage regulator)
  • Lecture-30: video handout (Types of voltage regulator - Linear and Switching, basic concept of linear regulator - regulating the output voltage by dropping voltage across passive or active element, linear regulator vs standard non-inverting amplifier, significance of high current output stage or pass element in linear regulator, regulator parameters). Refer to previous year's lecture ( video pdf) for line regulation, load regulation, load transient.
  • Lecture-31: video handout (Efficiency of a linear regulator, linear regulator as current driver/regulator, introduction to switching regulator, using PWM with LPF to regulate the voltage)
  • Lecture-32: video handout (Using volt-second balance to drive the relationship between input and output of a switching regulation, applying volt-second balance in a boost converter, controlling duty cycle of PWM using negative feedback, converting control voltage into PWM using PWM modulator, small signal gain of PWM modulator)
  • Lecture-33: video handout (Single edge vs dual edge PWM, using PWM modulator as an amplifier, closed loop operation of switching regulator - recovery of output voltage in case of change in input voltage, stability analysis of switching regulator - small signal continuous time modelling)
  • Lecture-34: video handout (modelling the power switches and LC filter, magnitude and phase response of LC resonance filter - peaking around wo vs Qo, overall loop gain, instability due to LC filter)
  • Lecture-35: video handout (Compensating a switching regulator, type-1 or integral compensation, finding the value of capacitor in integral compensation, determining the duty cycle in presence of series loss resistance, ripple current and voltage in switching regulator)
  • Lecture-36: video handout (Efficiency of a switching regulator, introduction to analog filters - definition and applications)
  • Lecture-37: video handout (Application in A/D converter as anti-aliasing filter, types of filter - LPF: Low Pass Filter, HPF: High Pass Filter, BPF: Band Pass Filter, BRF: Band Reject Filter, APF: All Pass Filter)
  • Lecture-38: video handout (Using low pass filter for generating delay, parameters of analog filters - pass band, transition band, stop band, -3dB cutoff, Magnitude response vs order of filter, Realizing or designing analog filters, 1st order passive filters - LPF and HPF using RL and RC, 1st order active filters - LPF using RL and RC)
  • Lecture-39: video handout (Realizing 1st order active filter using integrator, second order filter, realizing 2nd order low-Q filter using cascaded 1st order filters, band-reject filter using band-pass, standard 2nd order filter response and transfer functions)

You can find lectures from previous years below: