# Circuit Simulator - Relaxation Oscillator

#### Why should I learn to use the circuit simulator to design Relaxation Oscillator circuits?

Learn how to use circuit simulator software to design your own Relaxation Oscillator circuits.

#### Where can I get a Relaxation Oscillator circuit diagram with an explanation?

IndiaBIX provides numerous Relaxation Oscillator circuit diagrams with detailed explanations and working principles.

#### How do I design a Relaxation Oscillator circuit with this circuit simulator?

You can easily design Relaxation Oscillator circuit diagrams by practising with the given circuit simulator. With this online circuit simulator, you can design and simulate your own electronic circuits.

Relaxation Oscillator

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.

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.

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