Transistor as an amplifier and switch — Study Resources & PYQs
Operation of a transistor as a signal amplifier and as an electronic switching device.
- Estimated study time: 30 minutes
Study resources
- GeeksforGeeks - BJT Amplifier: Types, Working Principles and Formulas (Article) — Explains the active, saturation and cut-off regions of a BJT and how each is exploited for amplification (active region) versus switching (cut-off/saturation).
- Neso Academy - Analog Electronics: BJT AC Analysis (Chapter 6) (Video) — Chapter 6 of the playlist explains how the same BJT is operated in the active region to amplify signals and in cut-off/saturation to act as a switch.
- Introduction to Bipolar Junction Transistors (Article) — Explains the BJT as a current-controlled current regulator, then the sidebar leads to separate pages for common-emitter, common-collector and common-base amplifiers with worked analysis.
- The Bipolar Junction Transistor (BJT) as a Switch (Article) — Shows the difference between biasing into the linear region (amplifier) and into saturation and cut-off (switch), with a lamp-driver example. The saturation vs cut-off distinction is the exam answer.
Taught in these subjects
- FUNDAMENTALS OF ELECTRONICS ENGINEERING — ECT1201 · Government College of Engineering and Technology, Jammu
- BASIC ELECTRONICS ENGG — ECT1101 · Government College of Engineering and Technology, Jammu