Operational Amplifier – Linear Integrated Circuits (LIC) | Ideal vs Practical & Open-Loop Operation

In this video, we begin the Operational Amplifier series from the Linear Integrated Circuits (LIC) syllabus.
This Video-1 focuses on building strong fundamentals by explaining the basic characteristics of op-amps and their open-loop operation.

🔹 Key Concepts Covered

Characteristics of Ideal Operational Amplifier

Difference between Ideal and Practical Op-Amps

Open-Loop Operation of Operational Amplifier

Limitations of open-loop op-amp

Why open-loop op-amps are not used as linear amplifiers

🔹 Open-Loop Operation: Applications

Comparator
→ Compares two input voltages and produces HIGH or LOW output

Detectors
→ Detects when input crosses a reference level

Limiters / Clippers
→ Limits output voltage to a predefined level

Digital Interfacing Devices (Converters)
→ Used in ADCs, DACs, and zero-crossing detectors

This video lays the foundation for feedback-based amplifier circuits, which will be discussed in the next video.

📌 Upcoming Video (Video-2)

Importance of Feedback in Op-Amps

Inverting Amplifier

Non-Inverting Amplifier

Previous GATE Questions

Sample Interview Questions

🎯 Who should watch this video?

B.Tech / Diploma students

GATE / ESE aspirants

Anyone studying Linear Integrated Circuits

📺 Watch till the end to clearly understand why open-loop op-amps are mainly used as comparators and detectors, and not as amplifiers.

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