61. Multi-Transistor Amplifiers: Cascode Amplifier (Part A)
The chapter discusses the behavior of a cascode transistor with respect to its input and output impedances and capacitances. It elaborates on how the amplifier's gain is influenced by external resistances and capacitances, particularly emphasizing the significance of the Miller effect. Reductions in input capacitance are highlighted as critical improvements of cascode amplifiers compared to standard configurations.
Enroll to start learning
You've not yet enrolled in this course. Please enroll for free to listen to audio lessons, classroom podcasts and take practice test.
Sections
Navigate through the learning materials and practice exercises.
What we have learnt
- The output impedance of the cascode transistor is influenced by different configurations.
- Cascode amplifiers improve input capacitance by maintaining low gain.
- Input capacitance reduction is significant for circuit performance compared to standard CE amplifiers.
Key Concepts
- -- Cascode Amplifier
- A two-stage amplifier configuration that improves the bandwidth and input/output impedances.
- -- Miller Effect
- The phenomenon where the bandwidth of an amplifier is reduced due to feedback effects, leading to an increase in effective capacitance.
Additional Learning Materials
Supplementary resources to enhance your learning experience.