Hey.
So I bought a frequency generator, hooked it up to my X² squarer (http://johannburkard.de/blog/music/effects/x2-analog-multiplier-squarer-jam.html) and looked at the fundamental and it was more than 35 dB below the squared signal. :icon_eek:
(http://farm3.static.flickr.com/2339/2178266689_e664d64234.jpg) (http://johannburkard.de/blog/music/effects/analog-multiplier-testing-with-my-signal-generator.html)
I guess that is a lot more than your average full-wave rectifier?
That is certainly good for a frequency doubler, but a mere 35dB rejection of carrier would not be quiet enough for a ring modulator in general. The question is, can you hear the carrier being swept through the audio band, while there is no input?
It's a battle (layout) to get a really good result.
On the other hand, it's surprising how well some people have done with the traditional transformer & diode ring modulator. But that is far too labor intensive for me, and the transformers limit the carrier range. (the AD633 is happy right down to DC, of course!)
Quote from: Paul Perry (Frostwave) on January 11, 2008, 10:51:17 AM
That is certainly good for a frequency doubler, but a mere 35dB rejection of carrier would not be quiet enough for a ring modulator in general. The question is, can you hear the carrier being swept through the audio band, while there is no input?
It's a multiplier, not a ring mod. :-)
Quote from: Paul Perry (Frostwave) on January 11, 2008, 10:51:17 AM
(the AD633 is happy right down to DC, of course!)
I saw that, too. Swept all the way down to 10 Hz or so and got 20 Hz out.
Yeah, I know it's a multiplier. Now play a chord through it. :icon_wink:
Quote from: Paul Perry (Frostwave) on January 12, 2008, 08:02:21 AM
Yeah, I know it's a multiplier. Now play a chord through it. :icon_wink:
Done (http://johannburkard.de/blog/music/effects/x2-analog-multiplier-squarer-jam.html). :icon_twisted:
Nice clip, Johann!
Now I will have to add a switch to my ring modulator, to convert it to a squarer :icon_wink:
Quote from: Paul Perry (Frostwave) on January 14, 2008, 09:10:55 AM
Nice clip, Johann!
Now I will have to add a switch to my ring modulator, to convert it to a squarer :icon_wink:
The world clearly needs more octave-up. :icon_idea:
Quote from: g3rmanium on January 14, 2008, 09:11:53 AM
The world clearly needs more octave-up. :icon_idea:
;D ;D ;D