pucho812
Well-known member
Is it as simple as I have read, a couple of dioodes in the feedback loop on an opamp or am I missing something here?
dandeurloo said:JR, do you know of any good peak limiters that can be DIY'ed?
You can literally make that transfer function with a diode break amplifier. Imagine a simple inverting opamp with a feedback resistor for low level part of your sine wave. Above a certain voltage diode steering put another resistor in parallel with the first for lower gain above that threshold. A similar symmetrical circuit for the negative swing.pucho812 said:Well lets see, as I understand it so far, lets say you have a sine wave going through an amp stage. There is a point where waveform distortion occurs. Here is a photo to illustrate what I am asking.
I have seen various schematics and trying to figure out how one would achieve such a thing. The short answer is overdrive a tube, but wondering how to get those operational characteristics out of a general purpose opamp
pucho812 said:Ultimately for me I want a mic pre that has soft clipping built in.
An oxymoron, as far as I can tell.magicchord said:"a low-distortion Hard Clipper"
That's the case with any half-decent clipper, but "soft" means the transition zone is much larger than with a "hard" clipper. So the zone where distortion occurs is larger in a soft clipper than a hard clipper, but overall the distortion is less harsh with a soft clipper. As always, it's a trade-off.tv said:Yeah ... but I think the main point of "low distortion" is that the diodes are (practically) "out of the circuit", i.e reversely biased, until they "meet" the reference voltage, so in that area below the reference, they don't "fuzz" the signal very much
I used a VCA as a modulator and made the waveform modulate itself. The Waveulator: Two VCA-based Clipper Saturators - Pro Audio Design ForumIs it as simple as I have read, a couple of dioodes in the feedback loop on an opamp or am I missing something here?
When do you think this will be available?Soft saturation: You mean like this?
I used a VCA as a modulator and made the waveform modulate itself. The Waveulator: Two VCA-based Clipper Saturators - Pro Audio Design Forum
Jump to page 4 where you'll find some demo files: The Waveulator: Two VCA-based Clipper Saturators - Page 4 - Pro Audio Design Forum
Hard clipping without hard corners:
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