Oscillators & Barkhausen Criterion - Basic Introduction

This electronics video tutorial provides a basic introduction into oscillators and the barkhausen criterion.  An oscillator consists of an amplifier and an attenuation network providing positive regenerative feedback.  In order for sustain oscillations to occur, the amplifier and the positive feedback network must provide a total phase shift of 360 degrees to reinforce the oscillations at the input.  In addition, the loop gain (product of the voltage gain and the attenuation factor) must be nearly equal to 1 for oscillations to continue.

Transistors - NPN & PNP:                      
Transistors - NPN & PNP - Basic Intro...

Operational Amplifiers:                                      
Operational Amplifiers - Inverting & ...

Summing Amplifiers:                                          
Summing Amplifiers - Op Amp Circuits

LM386 Audio Amplifier Circuit:                        
LM386 Audio Amplifier Circuit With Ba...

LC Oscillator Tank Circuit:                                
LC Oscillator Tank Circuit

A Simple Oscillator Circuit:                                
A Simple Oscillator Circuit

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A Simple Sine Wave Oscillator Circuit:            
How To Use a Motor, Inductor, & Two C...

The Transistor Oscillator Circuit:                      
Transistor Oscillator Circuit

LED Flasher Circuit:                                            
LED Flasher Circuit

RC Phase Shift Oscillator Circuit:                    
RC Phase Shift Oscillator Circuit Usi...

Wien Bridge Oscillator Circuit:                          
Wien Bridge Oscillator Circuit Using ...

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Colpitts Oscillator Transistor Circuit:              
Colpitts Oscillator NPN Transistor Ci...

Hartley Oscillator Circuit:                                  
Hartley Oscillator Circuit

Single Transistor Esaki Oscillator Circuit:        
Single Transistor Esaki Oscillator Ci...

Single Transistor LED Flasher Circuit:              
Single Transistor LED Flasher Circuit...

What Is Negative Resistance?                          
Negative Resistance In NPN 2N2222A Tr...

Colpitts Crystal Oscillator Circuit:                    
Colpitts Crystal Oscillator Circuit

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