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The chapter covers the analysis of frequency response in common emitter (CE) and common source (CS) amplifiers by considering the high-frequency models of BJT and MOSFET. It details the numerical examples illustrating how various circuit parameters affect mid-frequency gain, lower cutoff frequency, and upper cutoff frequency. The significance of input capacitance and the application of Miller's theorem in determining frequency response are also emphasized.
42.2
Frequency Response Of Ce/cs Amplifiers Considering High Frequency Models Of Bjt And Mosfet (Part C)
This section discusses the frequency response of common emitter and common source amplifiers, focusing on high frequency models of BJTs and MOSFETs, and includes numerical examples for practical understanding.
References
Lecture 42.pdfClass Notes
Memorization
What we have learnt
Final Test
Revision Tests
Term: Input Capacitance
Definition: The total capacitance at the input of the amplifier, which is affected by Millerβs theorem and influences high-frequency behavior.
Term: Cutoff Frequency
Definition: The frequency at which the output power drops to half its value (or -3 dB). The lower and upper cutoff frequencies define the bandwidth of the amplifier.
Term: Miller's Theorem
Definition: A method used to simplify the input capacitance calculations in circuits with feedback by reflecting the output capacitance to the input side.