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

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See this page for information on how to view these videos.

## Instructor: Qadeer Ahmad Khan

Course syllabus, schedule, and assignments can be seen here. If you wish to download these lectures for offline viewing, you may have to disable the player plugin on your browser.

## 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: