Basic Bipolar Junction Transistor Analysis: The Common-Emitter Circuit (066b2)

Electronics for the Inquisitive Experimenter

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As we continue this series on the Bipolar Junction Transistor, we take a close look at the Common-Emitter configuration. In this video I will present the characteristics of this configuration and then walk through its analysis and design.
With design values in hand, I will go to the "junk box," pick out some components to put this together on the bench. But, these component values will not match the design values exactly.
I will then reverse engineer the circuit to determine what collector-emitter voltage I should expect from my bench experiment.
While on the bench, I will swap out transistors to demonstrate the effects of the beta variations from transistor-to-transistor will have on the performance of the circuit.
Yes, I realize that I grabbed the wrong resistor for the picture of the base resistor. I really DID use the resistor I spoke of in the video.
=============== LINKS =================
LINK to the promised formula sheet:
drive.google.com/file/d/1o-m8...
=== VIDEO LINKS ===
Kirchhoff's Voltage Law
• Kirchhoff's Voltage La...
Basic Model for the Bipolar Junction Transistor
• Basic Bipolar Junction...
Links to all the videos in this series are below the time markers.
=======================================
Time Markers for Your Convenience
----------------------------
00:05 Introductory Comments
02:48 We begin …
02:55 The Common Emitter Circuit Description
05:27 Our Goals for this Analysis
05:51 The Analysis
05:54 The Collector Circuit
08:52 The Base Circuit
13:04 The Bench Experiment
13:10 Component Gathering
14:02 Reverse Engineering Our Circuit
14:13 Reverse Engineering the Base Circuit
16:39 Reverse Engineering the Collector Circuit
19:30 The Bench Experiment Results
20:15 The Effects of Variations in Beta?
21:18 The Future Solution...
21:56 Final Comments and Toodle-Oots
-----------------------------
==== This video Series ====
Video#1: Introduction to the Junction Diode (How PN junctions work)
• Introducing PN Junctio...
Video#2: Introduction to the Bipolar Junction Transistor (BJT)
• Introducing Bipolar Ju...
Video#3: Basic Bipolar Junction Transistor (BJT) Metrics for the Experimenter
• Basic Bipolar Junction...
Video #4 Basic Bipolar Junction Transistor Analysis: The Model
• Basic Bipolar Junction...
Video #5 Basic Bipolar Junction Transistor Analysis: The Common-Emitter Circuit
• Basic Bipolar Junction...
Video #6 Basic Bipolar Junction Transistor Analysis: The Common-Collector Circuit
• Basic Bipolar Junction...
Video #7 Basic Bipolar Junction Transistor Analysis: The Common-Base Circuit
• Basic Bipolar Junction...
Video #8 A Beta Stabilized Common-Emitter BJT Circuit: Analysis & Design
• A Beta-Stabilized, Com...
Video #9 A Beta Stabilized Common-Emitter BJT Circuit: Part Selection, Reverse Engineering and Bench Results
• A Beta-Stabilized, C-E...

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2 июн 2024

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Комментарии : 20

@WECB640 4 месяца назад

This channel is one of the best I've seen regarding teaching electronics theory. Worth its weight in gold! Thank you Ralph. 73

@electronicsfortheinquisitiveex 4 месяца назад

Thank you so much! You are very welcome! 🙂

@milesprower6641 4 месяца назад

Too bad videos don't weigh very much anymore; I say at least 20x it's weight in gold!

@electronicsfortheinquisitiveex 4 месяца назад

@@milesprower6641 Thank you so much! 🙂

@W1RMD 4 месяца назад

Amazing! You've got to me the most under rated channel on RU-vid. Many thanks.

@electronicsfortheinquisitiveex 4 месяца назад

Thank you! I am so glad that you find my videos helpful. You are very welcome! 🙂

@berndb.5097 4 месяца назад

Simply brilliantly explained 👌, you are a very good teacher. It's a good thing I found your channel. I will recommend you. 👍

@electronicsfortheinquisitiveex 4 месяца назад

Thank you so very much! 🙂

@user-em7lp1sb4k 4 месяца назад

Good stuff Ralph keep up the good work, and thanks for the formula sheet I'll put it to good use.

@electronicsfortheinquisitiveex 4 месяца назад

You are welcome! I am glad that the formula sheet will help. I made a copy and put it in my lab notebook myself for future reference. 🙂

@keithflesser1533 4 месяца назад

Thank you for these very educational videos mate. I really like the way you present your videos.

@electronicsfortheinquisitiveex 4 месяца назад

You are very welcome. Thank you for the encouragement! 🙂

@DavePKW Месяц назад

I am new to your channel. This is just wonderful! Thank you so much.

@electronicsfortheinquisitiveex Месяц назад

I am so glad that you are finding these videos helpful! You are very welcome! 🙂

@ornithopterindia 4 месяца назад

👍Thank you sir.

@electronicsfortheinquisitiveex 4 месяца назад

You are welcome! 🙂

@1shARyn3 4 месяца назад

Effect of measuring device (not just transistor circuits) --- why we used to use VTVMs rather than VOMs while measuring ...

@electronicsfortheinquisitiveex 4 месяца назад

Absolutely! 🙂

@rtybn2012 3 месяца назад

The bias circuit is the worst type of bias. With temperature changes the collector voltage will be very unstable. The best type of bias is using to resistors in the base of the transistor, which adds complications to the design.

@electronicsfortheinquisitiveex 3 месяца назад

Absolutely, totally correct!😀 This was the most basic example of a common-emitter circuit. It is intended as a *primer* on how to go about the analysis and design of transistor circuits. As I said in the video, this is fixed with the "beta-stabilized" version. The addition of an emitter resistor and a voltage divider bias. As I also said in my video, there is a video coming in which I work through this whole design. In fact, I am in the midst of creating this video, even as I type. So, stay tuned ... the best is yet to come. 🙂