EE3002: Analog Circuits(Aug.-Nov. 2021)

• Saurabh Saxena
• Nagendra Krishnapura

• Online! See email sent to class mailing list for details.

E slot(Tu 11-11:50am; W 10-10:50am; Th 8-8:50am; Fr 4:50-5:40pm)

Registered students can login and see the course page at https://courses.iitm.ac.in/. Resources, tutorials, exam schedules, discussion forum etc. can be accessed from the moodle page.

Login to moodle at https://courses.iitm.ac.in/ to post questions and contact TAs and faculty.

Two quizzes (40%); Final exam (40%); Tutorials (20%)

The recorded video lectures from a previous year of the course are available here.

Lectures

1. Lecture #1 (pdf): Introduction to non-linear elements
2. Lecture #2 (pdf): Analysis of circuits with non-linear elements including operating point and small-signal analysis
3. Lecture #3 (pdf): Using diode as a non-linear element
4. Lecture #4 (pdf): Non-linear analysis of circuits with a diode, Zeroth-order approximation of I-V characteristics of a diode
5. Lecture #5 (pdf): Linear analysis of circuits with zeroth-order approximation, analysis of a linear two-port network for maximum output gain
6. Lecture #6 (pdf): Introduction to MOSFETs
7. Lecture #7 (pdf): Input/Output characteristics of NMOS, small-signal model of NMOS
8. Lecture #8 (pdf): Small-signal model of NMOS (contd.)
9. Lecture #9 (pdf): Operating-point and small-signal analysis of a common source (CS) amplifier
10. Lecture #10 (pdf): Small-signal analysis of a common source (CS) amplifier (contd.), input/output swing limits in a CS amplifier
11. Lecture #11 (pdf): Input/output swing limits in a CS amplifier (contd.), channel length modulation in NMOS, NMOS small-signal model with channel length modulation
12. Lecture #12 (pdf): Gain variation with voltage biasing, current biasing for NMOS
13. Lecture #13 (pdf): Current biasing for NMOS (contd.)
14. Lecture #14 (pdf): Replica based NMOS current biasing
15. Lecture #15 (pdf): Small-signal analysis with current biasing for CS amplifier, common drain (CD) amplifier
16. Lecture #16 (pdf): CD amplifier with current biasing, cascaded CS and CD amplifier
17. Lecture #17 (pdf): Opamp based fixed current biasing
18. Lecture #18 (pdf): Opamp based fixed current biasing (contd.)
19. Lecture #19 (pdf): Opamp based fixed current biasing (contd.), current mirrors
20. Lecture #20 (pdf): Voltage Controlled Voltage Source (VCCS) using NMOS
21. Lecture #21 (pdf): Voltage Controlled Voltage Source (VCVS), Current Controlled Current Source (CCCS) using NMOS
22. Lecture #22 (pdf): CCCS (contd.), Current Controlled Voltage Source (CCVS) using NMOS
23. Lecture #23 (pdf): Introduction to PMOS, PMOS operating point and its small-signal model
24. Lecture #24 (pdf): Converting nMOS circuits to pMOS
25. Lecture #25 (pdf): Converting nMOS circuits to pMOS; Limits on the gain of a common-source amplifier
26. Lecture #26 (pdf): Limits on the gain of a common-source amplifier; Weak inversion model of the MOS transistor
27. Lecture #27 (pdf): Active load for realizing a high-gain common-source amplifier
28. Lecture #28 (pdf): nMOS and pMOS common-source amplifiers with active load; CMOS inverter; Large signal input-output characteristics
29. Lecture #29 (pdf): Amplifiers and digital gates; Biasing a high-gain amplifier
30. Lecture #30 (pdf): Biasing a high-gain amplifier using negative feedback; CMOS inverter as an amplifier
31. Lecture #31 (pdf): Controlled sources using an opamp; Realizing an opamp using MOS transistors
32. Lecture #32 (pdf): Realizing an opamp using MOS transistors; Differential amplifier
33. Lecture #33 (pdf): Differential amplifier with a current mirror load
34. Lecture #34 (pdf): Differential amplifier with a current mirror load-small signal equivalent
35. Lecture #35 (pdf): Differential amplifier with a current mirror load-Differential and common-mode gains
36. Lecture #36 (pdf): Differential amplifier with a current mirror load-Swing limits
37. Lecture #37 (pdf): Single-stage opamp with a buffer; Two-stage opamp
38. Lecture #38 (pdf): Two-stage opamp; DC negative feedback and setting up of the operating point
39. Lecture #39 (pdf): Two-stage opamp; Negative feedback and stability
40. Lecture #40 (pdf): Two-stage opamp; Dominant pole compensation
41. Lecture #41 (pdf): Two-stage opamp; Dominant pole compensation; Pole splitting
42. Lecture #42 (pdf): Two-stage opamp; Dominant pole compensation; Pole splitting; Zero-cancelling resistor

Tutorials

1. Tutorial #1 (pdf): Circuits with diodes
2. Tutorial #2 (pdf): Swing limits in single-transistor amplifier
3. Tutorial #3 (pdf): Calculating operating point and swing-limits in a PMOS based CS amplifier

Link to original lecture video page from previous years:

All years, all courses from VLSI group: http://www.ee.iitm.ac.in/videolectures/doku.php?id=allyears

Problem sets will be posted on moodle. You are expected to solve them on your own. You can approach the teaching assistants for clarifications and help. You should work each one before the corresponding dates given below. (The dates below are only tentative ones and can be changed at any time)

LTSpice tutorial/simulation exercises: The simulation files are hosted on GitHub. The link to it and a set of guidelines are compiled in the PDF below. The exercises were designed to explain LTspice by simulating various circuits. Different circuits have been chosen to explain different analysis and testbench setups e.g. R-2R ladder / RC filters / RLC circuits / Rectifiers / Wein Bridge oscillator / Single stage Opamp / 555 Timer / MOSFETs. Most of those circuits have either been covered in previous or ongoing courses.

• LTSpice Simulation exercises
• Other simulation exercises for practice)

Use the TSMC 0.18um MOSFET Model Files from: http://www.ee.iitm.ac.in/~nagendra/cadinfo.html

• Bode plots: Recorded lectures here and here
• Two port parameters:
  • Lectures 14, 15 of Electrical and Magnetic Circuits
  • lectures 20(second half), 21, 24, 25, 26 of Prof. Dutta Roy's course on circuit theory at NPTEL. Problems in two port parameters are in lectures in 23, 25, 29
• Circuit analysis with Laplace Transforms: Follow lectures 5-8 at this link to refresh your understanding of laplace transform analysis, sinusoidal steady state etc. Solve the practice problems in this problem set.

• Electrical and Magnetic Circuits | Electric Circuits and Networks
• Networks and Systems | Signals and Systems
• http://www.ee.iitm.ac.in/vlsi/courses/ee2019_2021qk/start or http://www.ee.iitm.ac.in/videolectures/doku.php?id=ee2019_2021:start | Analog Systems & Lab

Please enter your roll number in the chat window as soon as you join the class on the video conference session.