Build A Simple Sine Wave Oscillator

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This time we're looking at how to build the venerable Wien Bridge Oscillator circuit. Using some clever feedback with a self-biasing JFET. This circuit Is essentially a very high Q filter, fed back using an op-amp with positive feedback to create an oscillation. Which is then sustained by careful managing of the op-amp closed loop gain.

Schematics: https://drive.google.com/file/d/1khD2...

00:00 Intro
00:40 Wien Bridge Overview
02:10 Oscillator Basics
03:27 Circuit Setup
04:11 Automatic Gain Control
05:13 Diode Recap
06:22 JFETs & AGC
09:00 Circuit Demo
13:31 Add Voltage Control
16:06 Summary & Next Time!

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• #op_amp