4049 octaver?

[jimmy]

hi

just had an idea...

is it possible to use 2 inverters on a 4049 or a 4069 to make an octave up circuit? i mean you split the signal, one goes through a diode facing one way into the inverter then back out, and the other goes through another diode facing the opposite way and then into the inverter, and then mix them back together again?

or have i misunderstood the concept? i thought an inverter chip would be good because you can get plenty of great lo an hi gain sounds for one chip, and a relatively simple circuit.

cheers
Jim

[puretube]

http://diystompboxes.com/sboxforum/viewtopic.php?t=32836
:wink:

[jimmy]

ahhhh there we are. good stuff. ill see if i can get one sorted this weekend and ill let you know how it goes!! thanks!

cheers
Jim

[R.G.]

Any phase inverter/rectifier setup *can* be used for making a FWR octave up. The only differences are in the details of the circuit.

[gez]

Wire up source resistors for one of the inverters (biased in the normal way for 'linear' operation) in a 4007 chip and you end up with a phase splitter.  Diodes can be draped off both sources and you end up with an octave effect.  The other inverters can be used to drive it.

I'm not keen on these type of octave circuits (they all sound bad to my ears), but CMOS versions are a tad better IMO.