Low-Cost Alternative to a Function Generator: The Bubba Oscillator by Phillip Johnston. 4 March Introduction. When testing the functionality of a circuit or . Bubba Oscillator. 0. Favorite. 4. Copy. Views. Open Circuit. Bubba Oscillator. Social Share. Circuit Description. Graph image for Bubba Oscillator. Solved: Hi there. I’m trying to make a sine wave inverter based on “Bubba Oscillator”. The output of the bubba oscillator is a nice sine.

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Here’s a circuit that should actually work, using a quad LT and a single power supply rail: Insert that limiting circuit in parallel with one of the capacitors.

Trevor Yeah, strangely enough this oscillator relies on the non-ideal properties of the opamps. The problem is that i am not able to generate the sinusoidal from the circuit.

These opamps cannot generate infinite voltages so at some voltage their output voltage will be less than what you would ideally bybba.

That’s what your plot shows. But this will probably result in a distorted sinewave.

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How to achieve a pure sinusoidal waveform from this bubba osdillator Just to add yet another post on this. The amplitude does not grow any more to infinity. This is what is causing an exception And this below is my result Simulated for 10sec: Take a couple of zener diodes connected in series having the anodes against each other.


For the Bubba oscillator this is the case. I suggest reading about the Barkhausen stability criterion. The only property which is important is an amplitude limitation due to the power supply rails.

Email Required, but never shown. A drastic improvement reduction of distortion is possible when we use two different supply rail voltage pairs and bkbba the ouput is taken from the block with the larger supply voltage limiting effect in the block with smaller supply voltages.

Set more time for the simulation. Sine generator – Bubba Oscillator Ask Question. Post Your Answer Discard By clicking “Post Your Answer”, you acknowledge that you have read our updated terms of serviceprivacy policy and cookie policyand that your continued use of the website is subject to these policies.

So sorry to bug you, i am using MATLAB b, can you upload the file gubba previous version if thats not much trouble, if not, never mind. And that means the loopgain becomes smaller.

Bubba Oscillator – CircuitLab

By real op-ampsdo you mean finite gain op-amp? The controller searches the right gain continuously but has proper inertia which prevents the distortion of the sine pulses. Sign up or log in Sign up using Google.


This below is my circuit: This is the error message. This is not a good solution if you need low distortion sinewave.

Solved: Bubba Oscillator as a sine wave inverter – Discussion Forums – National Instruments

After setting sec as simulation time, the amplitude goes to infinity and at around 51 sec, Derivative of state at time Sign up using Email and Password. It needs a voltage contolled component which has variable gain, attenuation or resistance.

What is needed is a limitation on the output voltage. What happens after that By using our site, you acknowledge that you have read and understand our Cookie PolicyPrivacy Policyand our Terms of Service. The amplitude grows exponentially.

Home Questions Tags Users Unanswered. This is not that easy to model I know, I have tried. Sorry, i am quite new at electronics