• S. Aniruddhan

• Classes will be held in online mode. See the message sent to the class on Moodle for details.

D slot, MTech Calendar (Mo. 11-11:50am, Tu. 10-10:50am, We. 9-9:50am, Th. 12-12:50pm)

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.

• Assignments (20%)
• Quiz-I (20%)
• Quiz-II (20%)
• Final Exam (40%)

• Understanding of MOS transistors: Focus on the behavior relevant to analog IC design.
• Develop design intuition: Feel for tradeoffs – noise, dynamic range, power.
• Design based on hand calculations: Avoid perpetual “tweaking” in SPICE.
• Gain hands-on design experience: High performance amplifier design project.

• Introduction and Basic Concepts: analog vs digital, applications of analog ICs, CMOS technology and devices, device mismatch and errors, MOS transistor behavior, noise in passives & MOSFETs, systematic design procedure for basic amplifier.
• Advanced Topics: multi-stage amplifiers, compensation techniques & loop stability, transient response in amplifiers, designing amplifiers for transient response Gm-C integrators, Fully Differential Opamps.
• (Possible) Special Topics: Switched capacitor circuits; High-speed amplifiers etc

All notes so far in a single pdf file: Lecture notes

1. 2021-02-02: Resistors and Capacitors on ICs
2. 2021-02-03: Noise in resistors and MOSFETs
3. 2021-02-08: Noise in 2-port networks; input-referred noise
4. 2021-02-09: Calculation of input-referred noise
5. 2021-02-10: Input-referred noise of Common Source Amplifier - 1
6. 2021-02-11: Input-referred noise of Common Source Amplifier - 2
7. 2021-02-15: Input-referred noise calculation with capacitors
8. 2021-02-16: Input-referred noise of Common Gate Amplifier
9. 2021-02-17: Calculation of noise from Cascode device, active load
10. 2021-02-18: Noise in differential circuits
11. 2021-02-22: Calculation of noise of differential amplifier
12. 2021-02-23: Introduction to Mismatch; Systematic mismatch
13. 2021-02-24: Random Mismatch; Input-referred offset voltage
14. 2021-02-25: Input-referred offset of differential amplifier
15. 2021-02-27: One-stage opamp datasheet - 1
16. 2021-03-02: One-stage opamp datasheet - 2
17. 2021-03-03: Evolution of telescopic opamp
18. 2021-03-04: Cascode current mirrors; telescopic opamp datasheet - 1
19. 2021-03-08: Telescopic opamp datasheet - 2
20. 2021-03-09: Telescopic opamp datasheet - 3
21. 2021-03-10: Folded Cascode opamp
22. 2021-03-11: Folded Cascode opamp datasheet - 1
23. 2021-03-15: Quiz 1 discussion; Folded Cascode opamp slew rate
24. 2021-03-16: Two-stage opamp at the block level; Miller compensation
25. 2021-03-17: Two-stage opamp datasheet
26. 2021-03-18: Two-stage opamp slew rate; opamp with low input CM voltage
27. 2021-03-22: Two-stage opamp design example - 1
28. 2021-03-23: Backgate effect; Two-stage opamp design example - 2
29. 2021-03-24: MOSFET transit frequency
30. 2021-03-25: Two-stage opamp with pole-zero cancellation compensation
31. 2021-04-06: Pole-zero tracking circuits
32. 2021-04-07: Three-stage opamp; Feedforward compensated opamp
33. 2021-04-08: Fully Differential one-stage opamp
34. 2021-04-09: Common Mode Feedback and its frequency compensation
35. 2021-04-10: Fully Differential two-stage opamp
36. 2021-04-12: Common Mode Feedback for Fully Differential two-stage opamp
37. 2021-04-13: Introduction to Phase Locked Loops
38. 2021-04-14: Type-I PLL phase domain incremental model
39. 2021-04-15: PLL phase bode plots; Tristate phase-frequency detector
40. 2021-04-16: Tristate PFD operation
41. 2021-04-18: Type-I PLL reference feedthrough; Type-II PLL
42. 2021-04-19: Proportional and integral paths; Charge pump
43. 2021-04-20: PFD and Charge Pump non-idealities; Type-II PLL Bode Plots
44. 2021-04-21: Introduction to oscillators
45. 2021-04-22: Opamps and CMFB Q-A session
46. 2021-04-24: Cross-coupled LC oscillator; Varactors
47. 2021-04-24: LC VCO analysis; Varactors; PLL design example

Problem sets will be posted below. 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.

1. Homework 1: pdf on process variations and mismatch - Due 11:59pm on Sunday 14th March 2021
2. Homework 2: pdf on single-stage amplifiers - Due 11:59pm on Saturday 27th March 2021
3. Homework 3: pdf on building blocks - Due 11:59pm on Friday 16th April 2021
4. Homework 4: pdf on Fully Differential Amplifiers - Due 11:59pm on Thursday 29th April 2021
5. Homework 5: pdf on Fully Differential Capacitive Feedback Amplifier - Due 11:59pm on Sunday 16th May 2021

All simulation assignments/projects will be done on LTSpice (https://www.analog.com/en/design-center/design-tools-and-calculators/ltspice-simulator.html). If you have access to another circuit simulator such as Spectre or Eldo through another course or through your research lab, you are welcome to use that simulator. Some simple simulation exercises for practice are listed below to get you started.

• LTSpice Simulation exercises
• Other simulation exercises for practice)

For the assignments and projects, use the IBM 130nm MOSFET Model Files from: http://www.ee.iitm.ac.in/~nagendra/cadinfo.html

This course doesn't follow a single textbook. You can follow any of the references below for different sections of the course.

• Behzad Razavi, Design of Analog CMOS Integrated Circuits, McGraw-Hill, August 2000.
• The Design Of CMOS Radio-Frequency Integrated Circuits by Thomas H. Lee (Publisher: Cambridge University Press - 2006)
• Carusone, Johns, and Martin, Analog Integrated Circuit Design, 2nd ed., Wiley, 2000.
• Gray, Hurst, Lewis, and Meyer, Analysis and Design of Analog Integrated Circuits, 5th ed., Wiley 2009.

This course will mostly follow the lines of NPTEL course whose link is given below.

• NPTEL course on Analog IC Design

Knowledge of negative feedback control systems is essential for a good understanding of circuits. The book below is a very good reference. Chapters 8, 9, and 10 are particularly relevant to us.

• Astrom and Murray, Feedback Systems: An Introduction for Scientists and Engineers, Available: http://www.cds.caltech.edu/~murray/amwiki/index.php/Main_Page

• Analog Circuits

If you are little rusty on basic circuit analysis or laplace transforms, refresh them from the references below or any of the widely used textbooks. In particularly, we will use Bode plots and Laplace transforms widely-they are described at the last two links below.

• Electrical and Magnetic Circuits
• Networks and Systems
• Bode plots: Recorded lectures here and here
• 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.

Attendance will be strictly enforced as per the latest IITM rules and regulations. Those falling short will not be permitted to write the end sem exam.