madbeanpedals::forum

General => Open Discussion => Topic started by: midwayfair on March 19, 2014, 06:49:00 PM

Title: xlink from DIYSB: A thread about phase shift oscillators
Post by: midwayfair on March 19, 2014, 06:49:00 PM
I've spent a lot of time playing with these, and I haven't found a good spot that had as much info as possible in one place. Though they're not the most common LFO these days, I figured some people might have some questions, thoughts, or ideas about using or modifying them. Feel free to jump into the discussion there or here. Here's the thread:

http://www.diystompboxes.com/smfforum/index.php?topic=106566.0
Title: Re: xlink from DIYSB: A thread about phase shift oscillators
Post by: raulduke on March 20, 2014, 09:30:49 AM
Thanks for the link Jon.

I always like your write ups/ circuit notes and that was no different.

I also love this LFO (it has a nice sine wave-shape), so more info the better!
Title: Re: xlink from DIYSB: A thread about phase shift oscillators
Post by: JakeFuzz on March 20, 2014, 03:19:37 PM
There is a really good application notes by AD or TI somewhere about the different types of sine wave oscillators. I will try to find it. PSOs have been very handy but i've seen a lot of quadrature oscillators in time based effects.
Title: Re: xlink from DIYSB: A thread about phase shift oscillators
Post by: JakeFuzz on March 20, 2014, 03:21:22 PM
http://www.ti.com/lit/ml/sloa087/sloa087.pdf (http://www.ti.com/lit/ml/sloa087/sloa087.pdf)

Wasn't that hard to find. First google hit!
Title: Re: xlink from DIYSB: A thread about phase shift oscillators
Post by: jubal81 on March 21, 2014, 12:19:49 AM
Quote from: JakeFuzz on March 20, 2014, 03:21:22 PM
http://www.ti.com/lit/ml/sloa087/sloa087.pdf (http://www.ti.com/lit/ml/sloa087/sloa087.pdf)

Wasn't that hard to find. First google hit!

Great link, Jake. Now that I know there's an oscillator called the 'bubba' I'm going to have to find something to put it in.
Title: Re: xlink from DIYSB: A thread about phase shift oscillators
Post by: jubal81 on March 21, 2014, 12:23:14 AM
Also, the sine & cosine designs look like fun. Anyone seen them used together in an effect?
Title: Re: xlink from DIYSB: A thread about phase shift oscillators
Post by: JakeFuzz on March 21, 2014, 02:35:26 AM
http://dynacordcls22.homestead.com/CLS-222_entire.gif (http://dynacordcls22.homestead.com/CLS-222_entire.gif)

The whole top part of this "effect" uses a bunch of sine wave LFO's with wave outputs at each 45 deg phase shift. Wild design; always wanted to adapt it for a smaller package...