Can an audio amplifier be used with a sinewave oscillator to make a sinewave inverter?
I have a 12V sinewave generator circuit. It has a two pin output. Can I feed the output to an audio amplifier to amplify the signal and then feed the output of the amplifier to the step up transformer?
Or do I need to make a complicated circuit with 2N3055 transistors?
PS: I need almost pure sinewave output.
Thank you for your inputs.
Yes, you can do that, without the power transistors.
In fact, you may not need the transformer, if the audio amplifier is powerful enough.
If you need 120 volts, an audio amp that can drive that into 16 ohms has a P = E²/R rating, which is 120²/16 = 900 watts. Not undoable, amplifiers for subwoofers frequently are over 1000 watts.
And, “almost pure sinewave output” means your oscillator should be a very good one, as many have significant distortion. You can use filters to clean it up if you need to. One point: frequency stability would be poor for a lot of designs, as the components can be temperature sensitive. Ditto with amplitude stability.
Living in a Box – Touch Sensitive [AUDIO ONLY]