EC201: Analog Circuits, Aug-Nov 2007

These lectures are available on the web for the benefit of students at IIT Madras and elsewhere. Copyrights to these rest solely with the instructor and IIT Madras. Copying them, publishing them, rehosting them on other servers, or using them for any sort of commercial gain is prohibited.

Instructor : Shanthi Pavan

This is an introductory course on Analog Circuits. Familiarity with basic linear electrical networks is assumed. At IIT Madras, the prerequisite courses are Electric and Magnetic Circuits & Networks and Systems.

You can download the entire set of lectures. The archive contains directories for each day's lecture. It also has an index file 2007-ec201-shanthipavan.html from which you can access the lectures.

  1. Lecture 1 - Course overview and introduction.
  2. Lecture 2 - Introduction to nonlinear network elements, the notions of operating point and incremental linearity
  3. Lecture 3 - Nonlinear networks and incremental nonlinear networks
  4. Lecture 4 - Networks with two terminal nonlinear elements, the definition of small signal, nonlinear two port networks
  5. Lecture 5 - Nonlinear two ports, incremental two port parameters, constraints on the incremental Y-matrix to obtain gain
  6. Lecture 6 - Introducing the MOSFET as a natural outcome of the previous lecture, MOS Characteristics
  7. Lecture 7 - MOS Characteristics continued, linear and saturation regions, transconductance
  8. Lecture 8 - Synthesis of the Common Source Amplifier
  9. Lecture 9 - The Common Source amplifier continued, Swing limits
  10. Lecture 10 - Swing Limits continued
  11. Lecture 11 - Swing Limits continued, small signal operation revisited
  12. Lecture 12 - Introduction to stable biasing
  13. Lecture 13 - Bias Stabilization, the current mirror
  14. Lecture 14 - Bias Stabilization, drain feedback
  15. Lecture 15 - Bias Stabilization, source feedback
  16. Lecture 16 - Introduction to negative feedback
  17. Lecture 17 - More on negative feedback
  18. Lecture 18 - Bias Stabilization, drain current measurement and source feedback
  19. Lecture 19 (Part A) - Bias Stabilization continued, the real MOSFET and channel length modulation
  20. Tutorial 1
  21. Lecture 19 (Part B) - Deriving the common drain amplifier (an incremental VCVS with unity gain)
  22. Lecture 20 - Large signal behavior of the common-drain amplifier, deriving the transconductance (VCCS) and the common-gate (CCCS) amplifiers.
  23. Lecture 21 - The common-gate amplifier
  24. Lecture 22 - The transimpedance amplifier
  25. Lecture 23 - Swing Limits revisited, capacitive coupling considerations
  26. Tutorial 2
  27. Quiz 1 Question Paper
  28. Quiz 1 Solutions
  29. Lecture 24 - Introducing the PMOS transistor - equations, small signal model and the common-source amplifier.
  30. Lecture 25 - Bias Stabilization, Deriving the VCVS, VCCS, CCCS using the PMOS device.
  31. Tutorial 3
  32. Lecture 26 - CCVS using a PMOS device, problems with obtaining high gain with a resistive load, introducing the active load.
  33. Lecture 27 - The active load continued, the CMOS inverter.
  34. Lecture 28 (Part A) - The CMOS inverter, continued.
  35. Lecture 28 (Part B) - Introducing the Bipolar Junction Transistor.
  36. Lecture 29 - BJT Small Signal Model, Bias Stabilization.
  37. Lecture 30 - The NPN transistor continued, bias stabilization, the common collector amplifier.
  38. Lecture 31 - The transconductance amplifier (VCCS), the common base amplifier (CCCS) and the transimpedance amplifier (CCVS), using the npn transistor.
  39. Tutorial 4a
  40. Lecture 32 - The re model for BJTs and its utility, the PNP transistor, device bias stabilization, realization of the four controlled sources.
  41. Lecture 33 - Introducing the differential pair.
  42. Lecture 34 - The differential pair continued - common-mode range, half circuit analysis, common-mode rejection ratio.
  43. Lecture 35 - The differential pair continued - more on common-mode rejection, the active load.
  44. Lecture 36 - Differential pair with active load (continued). Introduction to opamp internals : the single stage opamp.
  45. October 23rd - Quiz 2 Question Paper
  46. October 24th - Quiz 2 Post Mortem
  47. Lecture 37 - The single stage opamp (contd)., problems with a single stage opamp.
  48. Tutorial 5
  49. Lecture 38 - Problems with a single stage opamp (contd)., the two stage opamp.
  50. Lecture 39 (Part A) - Memory effects in nonlinear circuits, high frequency MOS transistor model, frequency response of the common-source amplifier.
  51. Lecture 39 (Part B) - Frequency response of the common-source amplifier (contd), the Miller effect.
  52. Lecture 40 - Frequency response of the common-source amplifier(contd), frequency response of the common-drain amplifier.
  53. Lecture 41 - Frequency response of the common-drain amplifier(contd) and the common-gate amplifier, effect of forward amplifier bandwidth on the bandwidth of a closed loop system.
  54. Lecture 42 - Stability of feedback systems with first and second order forward amplifiers, conditional stability of a third order forward amplifier.
  55. Lecture 43 - Conditional stability of a third order forward amplifier (contd.), closed loop stabilization by introducing a dominant pole.
  56. Lecture 44 (Part A) - Dominant Pole Compensation (contd), final remarks on stability of feedback systems.
  57. Lecture 44 (Part B) - Opamp gainbandwidth product, circuit techniques for compensation - Miller compensation and its implementation in a two stage opamp.
  58. Tutorial 6
  59. Lecture 45 (Part A) - Applications of operational amplifiers, the noninverting, inverting and summing amplifiers. Effect of finite gain-bandwidth product.
  60. Lecture 45 (Part B) - Input and ground as complements in ideal operational amplifier circuits, the relevance of DC negative feedback in opamp circuits.
  61. Lecture 46 - Inductance simulation using opamps, R and C, second order filters, the Butterworth approximation.
  62. Lecture 47 - Synthesis of a second order active-RC filter with bandpass and low-pass outputs.
  63. Lecture 48 - Synthesis of a biquad with arbitrary numerator, the effect of finite input and output impedance of opamps in feedback amplifiers.
  64. Lecture 49 - Effect of opamp gain-bandwidth product on input and output impedances of feedback amplifiers, output impedance of a voltage regulator, power supply bypassing.