Circuit Simulator - Relaxation Oscillator

Why Relaxation Oscillator?

Learn about Relaxation Oscillator to improve your skills and design your electronics projects yourself.

Where can I get Relaxation Oscillator Circuit Diagram with Explanation?

IndiaBIX provides you lots of fully solved Relaxation Oscillator circuit diagram with detailed explanation and working principles.

How to design a Relaxation Oscillator (electronic circuit)?

You can easily design the Relaxation Oscillator circuit by practicing the exercises given below. Here you can design and simulate your own electronic circuits with this Online Circuit Designer and Simulator.

Circuit Description:

This circuit is an oscillator that generates a square wave. The op-amp starts with its two inputs in an unknown state; let's say it starts with + slightly higher than –. The op-amp greatly amplifies this difference, bringing its output to the op-amp's positive power supply voltage, its maximum output (15 V in this case). The two 100k resistors act as a voltage divider which put the + input at half the output voltage, or 7.5 V. The – input is at ground, lower than the + input, so the op-amp output stays at 15 V.

Current flows from the op-amp output to ground through the capacitor, charging it. As soon as it charges to slightly more than 7.5 V, the – input is now higher than the +, and so the output flips to -15 V. This brings the + input to -7.5 V.

Now current flows in the other direction, discharging the capacitor and reversing its polarity until it reaches -7.5 V. Then the cycle repeats. -- Credits: Mr. Paul Falstad.

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