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Knowledge
The chapter delves into the frequency response of Common Emitter (CE) and Common Source (CS) amplifiers taking into account the high frequency models of BJTs and MOSFETs. It elaborates on the impact of capacitances associated with these transistors on their frequency response, mainly focusing on Miller's theorem to calculate effective capacitances. Additionally, it discusses special RC circuits and offers numerical examples to reinforce the concepts presented.
Sections
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40.1
Frequency Response Of Ce/ Cs Amplifiers Considering High Frequency Models Of Bjt And Mosfet (Part A)
This section explores the frequency response of Common Emitter (CE) and Common Source (CS) amplifiers, focusing on the impact of high-frequency models of BJT and MOSFET transistors.
References
Lecture 40.pdfClass Notes
Memorization
What we have learnt
- The frequency response of C...
- Miller's theorem is crucial...
- Understanding the frequency...
Final Test
Revision Tests
What we have learnt
- The frequency response of CE and CS amplifiers is significantly influenced by capacitances associated with BJTs and MOSFETs.
- Miller's theorem is crucial for determining the effective capacitance in frequency response analysis.
- Understanding the frequency response in specific circuit configurations including RC circuits is essential for accurate amplifier design.
Key Concepts
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Term: Frequency Response
Definition: The behavior of an amplifier with respect to the output signal as the input frequency varies.
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Term: Miller's Theorem
Definition: A technique used to simplify circuits with feedback by splitting a single bridging capacitance into two equivalent capacitances affecting the input and output.
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Term: Common Emitter Amplifier
Definition: A configuration of bipolar junction transistor (BJT) that provides voltage amplification and is used in various amplifier designs.
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Term: Common Source Amplifier
Definition: A configuration of a MOSFET that similarly provides voltage amplification, and operates under analogous principles to the common emitter format.