Calling CA3094 experts!!

[StephenGiles]

http://sites.google.com/site/electroconducive/EHpercusser.jpg

What is that CA3094 doing at the bottom of the page? Is it a VCF do you think? If so, an LM13600 should be able to behave in the same way.

The 2N3906 must be producing noise with it's output fed to the CA3094, which is controlled by the sweep generator - so could well be some sort of VCF.

Mark - for on the bus going home

We're off to see Show of Hands this evening - in a church. I hope the seats are not too hard!!

http://www.youtube.com/watch?v=6h2hUARm8Lo

[PRR]

Yes.

[StephenGiles]

Many thanks for that PRR. I used to have an applications paper on the CA3094 which I was given at EH UK - "used to" meaning that when I moved in 1989 to live with my now wife of 21 years, it was there in my EH file!

[vvarci]

Hi All!

I'm new to this forum and I'm not a guitar player but I hope someone can give me some answers regarding the CA3094 used in the DOD 525 compressor/limiter.
(I would like to use this circuit in a device which controls oscillators using an external audio source)

In the schematic (http://www.experimentalistsanonymous.com/diy/Schematics/Compressors%20Gates%20and%20Limiters/DOD%20525.jpg), the CA3094 is represented by 2 triangles but I'm not sure to which pins connections are drawn.

_|\|?    |\|?
3|+\___| \_
_|- /6 ? | /?
2|/ |     |/
  ?| |?

Can someone fill in the question marks and perhaps explain why?

Any help is really appreciated!
Ward

[Mark Hammer]

The second triangle is a buffer.

You'll find the same visual representation for the LM13600/13700 (both duals, where the 3094 is a single).

[Govmnt_Lacky]

Pin 2 = +
Pin 3 = -
Pin 4 = GND
Pin 7 = Vcc
Pin 6 = Output

The rest you can probably figure out from the DATASHEET.

Good Luck 

[vvarci]

Thanks a lot for both reply's!

Having another look at the datasheets (my favorite literature  ) and googling for "buffer" let me figure out the following:

_|\|7    |\|7
2|+\_._| \_
_|-/1  1| /6
3|/|      |/
4||5