65. Multi-Transistor Amplifiers: Cascode Amplifier (Contd.) – Numerical Examples (Part C)
The chapter discusses the Cascode Amplifier, focusing on its operational characteristics and performance benefits over traditional amplifiers. It highlights the enhancement of voltage gain achieved by using an active load as opposed to a passive load, showcasing numerical examples that demonstrate the cascode amplifier's advantages in various configurations. The chapter concludes with an overview of how cascode structures can significantly improve gain while maintaining input capacitance efficiency in both BJT and MOSFET applications.
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What we have learnt
- The Cascode Amplifier significantly increases voltage gain through active loading compared to passive loads.
- Both BJT and MOSFET configurations exhibit improved performance characteristics with cascode techniques.
- The gain-bandwidth product remains consistent while employing cascode structures, balancing gain and bandwidth.
Key Concepts
- -- Cascode Amplifier
- A configuration that uses an active load to enhance the voltage gain of an amplifier while potentially affecting its bandwidth.
- -- Voltage Gain
- The ratio of output voltage to input voltage in an amplifier, significant in determining the amplifier's performance.
- -- GainBandwidth Product
- A constant value for an amplifier that represents the trade-off between gain and bandwidth; both the cascode amplifier and traditional amplifiers maintain similar products.
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