Professional Courses
Industry-relevant training in Business, Technology, and Design to help professionals and graduates upskill for real-world careers.
Categories
Interactive Games
Fun, engaging games to boost memory, math fluency, typing speed, and English skills—perfect for learners of all ages.
Typing
Memory
Math
English Adventures
Knowledge
The chapter discusses common base and common gate amplifiers, focusing on their motivation, basic operation, biasing methods, and small signal analysis. It highlights how these configurations serve as buffers in current mode amplification, proving to be beneficial for circuit performance. A comparison is made between voltage mode and current mode buffers, emphasizing the importance of impedance characteristics in amplifier design.
Sections
References
Lecture 49.pdfClass Notes
Memorization
What we have learnt
- Common base amplifiers are ...
- Common gate amplifiers serv...
- The selection of suitable b...
Final Test
Revision Tests
What we have learnt
- Common base amplifiers are primarily used for current mode operation in BJT circuits.
- Common gate amplifiers serve a similar function in MOSFET circuits, providing necessary DC biasing for effective signal processing.
- The selection of suitable biasing techniques is critical for ensuring desired amplifier performance.
Key Concepts
-
Term: Common Base Amplifier
Definition: A BJT configuration used primarily for current mode amplification, characterized by a low input impedance and high output impedance.
-
Term: Common Gate Amplifier
Definition: A MOSFET configuration serving a similar purpose to the common base amplifier, used for current amplification with equivalent DC biasing methods.
-
Term: Biasing
Definition: The method of providing appropriate DC voltages to active devices to establish a stable operating point in amplifiers.
-
Term: Impedance
Definition: The measure of opposition that the amplifier presents to AC signals, which affects the gain and frequency response of the circuit.