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42. Frequency Response of CE/CS Amplifiers Considering High Frequency Models of BJT And MOSFET (Part C)

42. Frequency Response of CE/CS Amplifiers Considering High Frequency Models of BJT And MOSFET (Part C)

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.

Sections

Analog Electronic Circuits

This section explores frequency response in common emitter and common source amplifiers using high-frequency models of BJT and MOSFET.

42.1 Section Overview

Start current section content and materials

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.

42.2 Section Overview

Start current section content and materials

42.2.1 Generalized Equivalent Circuit Parameters

This section covers the analysis of generalized equivalent circuit parameters for CE and CS amplifiers, focusing on frequency response and key component values.

42.2.2 Frequency Response and Cutoff Frequencies

This section discusses the frequency response of Common Emitter (CE) and Common Source (CS) amplifiers, focusing on the calculations of cutoff frequencies and mid-frequency gain.

42.2.3 Mid Frequency Gain Analysis

This section explores the mid-frequency gain of common emitter and common source amplifiers, calculating cutoff frequencies and analyzing their frequency responses.

42.2.4 Practical Circuit Example

This section provides practical examples of analyzing frequency responses of analog circuits using BJT and MOSFET models.

42.2.5 Common Source Amplifier Analysis

This section discusses the analysis of common source amplifiers, focusing on frequency response and key parameters such as gain and cutoff frequencies.

42.2.6 Upper and Lower Cutoff Frequencies in Common Source Amplifier

This section focuses on determining the upper and lower cutoff frequencies for common source amplifiers, along with examples and calculations to demonstrate their significance.

42.2.7 Final Summary

This section summarizes the key concepts discussed in the chapter related to the frequency response of common emitter (CE) and common source (CS) amplifiers, including input capacitance and overall voltage gain.

Learning Objectives

  • The frequency response characteristics of common emitter and common source amplifiers are affected by circuit parameters.

  • Input capacitance plays a crucial role in determining the upper cutoff frequency.

  • Miller's theorem is instrumental in calculating input capacitance and analyzing overall frequency response.

Key Concepts

Input Capacitance

The total capacitance at the input of the amplifier, which is affected by Miller’s theorem and influences high-frequency behavior.

Cutoff Frequency

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.

Miller's Theorem

A method used to simplify the input capacitance calculations in circuits with feedback by reflecting the output capacitance to the input side.

Practice Exercises

Total Questions

2

Estimated Time

4 min

Passing Score

70%

Instructions

  • Read each question carefully
  • You can use hints if you need help
  • Complete all questions before submitting
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