Basic Bipolar Junction Transistor Analysis: The Common-Base Circuit (066b4)

Рет қаралды 629

Electronics for the Inquisitive Experimenter

4 ай бұрын

As we continue this series on the Bipolar Junction Transistor, we take a close look at the Common-Base 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 have to reverse engineer the circuit to determine what emitter-to-ground 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.
=============== LINKS =================
LINK to the promised formula sheet:
drive.google.com/file/d/1caRP...
=== VIDEO LINKS ===
Kirchoff's Voltage Law
• Kirchhoff's Voltage La...
Basic Model for the Bipolar Junction Transistor
• Basic Bipolar Junction...
Links to all of the videos in this series are below the time markers.
=======================================
Time Markers for Your Convenience
----------------------------
00:05 Introductory Comments
01:57 The Purpose of this Exercise
02:08 The Circuit
02:09 The Characteristics of the common-Base configuration
02:37 Building the Circuit - What does it look like?
05:04 Our Goals: A Wrap up...
05:31 The Analysis
05:31 The Analysis: The Collector Circuit
09:24 The Analysis: The Emitter Circuit
14:13 To The Bench
14:14 Choosing the Components from the junk box
15:12 Reverse Engineering: The Emitter Circuit
17:26 Reverse Engineering: The Collector Circuit
21:16 The Bench Experiment Itself
23:06 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...

Пікірлер: 16

@priceringo1756 4 ай бұрын

YT just fed me your previous video and now I am subscribed. I started my EE design career 34 years ago but quickly fell into software development instead. I am very interested in what this channel could get into. Thanks for your efforts.

@eie_for_you 4 ай бұрын

That is a very common thing to happen to EEs. I resisted that and remained primarily a hardware engineer throughout my career. However, now a days nearly EVERYTHING has some sort of processor embedded in it, so I did a LOT of embedded processor firmware (C) as well as programmable logic devices (VHDL). But my first love was always the hardware. I am glad to have you on board! 🙂

@Martock1017 2 ай бұрын

Always good to understand circuit theory from a slightly different perspective than the usual explanations. I've had many explanations of this since I first encountered transistors in the 1960s, but Ralph's was still informative.

@eie_for_you 2 ай бұрын

Thanks! 🙂

@W1RMD 4 ай бұрын

You make learning easy and fun! A lot can be learned by implementing these "basic" circuits. I love your approach to teaching thanks and tootaloots!

@eie_for_you 4 ай бұрын

Wow! What an encouragement! 🙂 You are very welcome!🤓

@Vincent-zz4xh 4 ай бұрын

What a fantastic experiment .

@eie_for_you 4 ай бұрын

Thanks! 🙂

@user-em7lp1sb4k 4 ай бұрын

Another great video I've learned so much watching this series. Thanks again Ralph.

@eie_for_you 4 ай бұрын

Thanks, man! ... and you are welcome! I have the first Beta Stable video rendering as I type for release next Wednesday. :-)

@ornithopterindia 4 ай бұрын

👍Thank you sir.

@eie_for_you 4 ай бұрын

You are welcome! :-)

@davidluther3955 26 күн бұрын

EXCELLENT PRESENTATION!ONE OTHER CHARACTERESTIC IS IT IS GOOD AT RF APLICATIONS.IT WOULD INTERESTING TO SEE THE RESULTS WITH AN AC SIGNAL THROUGH THE CIRCUIT.

@eie_for_you 25 күн бұрын

Thank you! Yes, it would. The next step would be A.C. analysis which I cover in the videos on load lines. 🙂

@bobodyuknow 3 ай бұрын

Never really understood this circuit or why one would even use it. I guess I would ask how does it perform over temperature? is it now only having voltage dependancy on the vbe temperature coefficient?

@eie_for_you 3 ай бұрын

As I have understood it, it performs well over temperature and avoids certain issues that other configurations have to deal with; which ones I am a loss to remember at the moment. Because it has voltage gain but not current gain, it is often used as a power amplifier. Same current in as out, but higher voltage = power increase. One could put a circuit such as this in LTSpice and tell LTSpice to step over temperature to see its response. 🙂