64. Multi-Transistor Amplifiers: Cascode Amplifier (Contd.) – Numerical Examples (Part B)
The chapter discusses the cascode amplifier, highlighting its advantages over standard CE amplifiers, primarily in terms of gain and bandwidth enhancement. It delves into numerical examples to illustrate its functionality, noting how higher resistance values affect performance. Additionally, the content addresses the trade-offs between gain and bandwidth, a crucial consideration in circuit design.
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What we have learnt
- The cascode amplifier offers improved gain and bandwidth compared to standard CE amplifiers.
- Increasing resistance values in circuits can enhance gain but may impact upper cutoff frequency.
- The trade-off between gain and bandwidth remains a vital consideration in designing analog circuits.
Key Concepts
- -- Cascode Amplifier
- A type of amplifier configuration that improves gain and bandwidth while reducing input capacitance, making it advantageous for high-frequency applications.
- -- Miller Effect
- Phenomenon in amplifiers where an input capacitance is effectively increased due to feedback, impacting bandwidth.
- -- GainBandwidth Product
- A constant for a given amplifier that reflects the trade-off between gain and bandwidth; as gain increases, bandwidth decreases and vice versa.
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