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Phase Locked Loops

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1688 min

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Electrical Engineering

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Why enroll

Participants join this course to develop a clear and conceptual understanding of semiconductor devices, which is crucial for advanced studies and careers in electronics and electrical engineering. The course helps bridge the gap between theoretical semiconductor physics and real-world device applications. It is especially valuable for students preparing for university exams, GATE, and other competitive examinations, as well as for learners aiming to build a strong foundation for VLSI, embedded systems, power electronics, and renewable energy domains.

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Is this course for you?

You should take this if

You work in Automotive
You're a Electrical Engineering professional
You have 3+ years of hands-on experience in this field
You want to build skills in Engineering & Design, Research & Developmnet

You should skip if

You're new to this field with no prior experience
You need a different specialisation outside Electrical Engineering
You need live interaction with an instructor

Course details

This course from IIT Madras provides a clear and practical introduction to Phase-Locked Loops (PLLs), a critical building block in modern electronic and communication systems. The course begins by relating periodic signals to everyday applications and explains their importance in reliable clock generation. It then develops the core principles of PLL operation and shows how PLLs are used to generate accurate, stable, and cost-effective clock signals across a wide range of systems.
Source - Nptel Noc Iitm

Course suitable for

Key topics covered

Understand what periodic signals are and how timing works in electronic systems
Learn how a Phase-Locked Loop (PLL) is structured and how it operates
Explore different types of phase detectors and how they compare signal phases
See how loop filters help control stability and improve system performance
Learn how Voltage-Controlled Oscillators (VCOs) generate and adjust frequencies
Understand how PLLs are used to create and multiply frequencies
Learn how accurate clocks are generated and synchronized across systems
Get familiar with jitter and noise, and how they affect signal quality
Discover how PLLs are used in real communication and digital applications

Course content

The course is readily available, allowing learners to start and complete it at their own pace.

65 lectures28 hr 8 min

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Skills & tools you'll gain

Engineering & Design

Research & Developmnet

Project Management

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Questions and Answers

Q: You're selecting a PLL for an automotive inverter controller and searching "automotive pll loop bandwidth vs phase noise tradeoff" after a supplier flags a ±0.1 mm connector offset that shifts clock trace length. Given CISPR 25 limits and a 20 MHz reference, which configuration best tolerates worst-case stack-up while keeping jitter inside ECU timing budget?

Q: During bench bring-up you notice lock time drifting with temperature and you Google "pll lock time increases with loop bandwidth temperature". The VCO gain doubles at hot due to silicon spread. What happens downstream, and what's the least risky corrective move before DFMEA closeout?

Q: You're on-site for ECU SAT and searching "how to verify pll lock during ecu power up". The spec says lock within 100 µs, but rev 4 drawings show an older test point. What's the correct verification sequence that won't mask a marginal loop?

Q: Field returns show intermittent loss of CAN timing sync and you're searching "pll intermittently loses lock under vibration". The unit passes thermal but fails random vibe. What's the root cause that fits all symptoms?