61. Multi-Transistor Amplifiers: Cascode Amplifier (Part A)
This chapter delves into Multi-Transistor Amplifiers, specifically discussing cascode amplifiers using both BJT and MOSFET configurations. It highlights the advantages of combining common emitter and common base stages to achieve higher voltage gain and performance efficiency. Detailed analysis and practical applications of the cascode amplifier are provided, emphasizing its importance in modern electronic circuits.
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What we have learnt
- Cascode amplifiers combine the benefits of common emitter and common base configurations to enhance voltage gain.
- The importance of proper biasing in ensuring stable operation of multi-transistor amplifiers is crucial.
- Understanding the performance metrics of both BJT and MOSFET configurations aids in circuit design and optimization.
Key Concepts
- -- Common Emitter (CE) Amplifier
- A configuration that provides high voltage gain and is primarily used for signal amplification.
- -- Common Base (CB) Amplifier
- A configuration characterized by low input impedance and high output impedance, suitable for current buffering.
- -- Cascode Amplifier
- A two-stage amplifier configuration that combines CE and CB stages, resulting in improved gain and bandwidth.
- -- Biasing
- The process of setting a transistor's operating point to ensure efficient and linear amplification.
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