CEM3374

[scopey at hooked.net]

I don't have anything on the test bench, because the only schematic I 
have seen for the 3374 is the Digisound Module #19 (VCLFO) which can be 
found at Andersus' website.  The unfortunate thing is, it includes no 
temp. compensation (there are no connections to pin 10).  According to 
others on this list, there are several ways of doing so, which include 
using a 1k Tempco Q81 resistor, or multiplying (VCA?) the voltage on pin 
10 with something (control voltage?).  Do I sound vague?  Good, because 
I don't really know what I'm talking about.  I have read recently that 
some people are satisfied with VCO's that don't have any sort of temp. 
compensation.  Who's to say what's fair game in electronic music.  I 
hope someone more knowledgable than me addresses this topic with regards 
to the 3374; in the meantime, I'm wondering if anyone knows a 
substitution for the TL092's in the circuit, and/or if the circuit can 
be modified to produce audio rate frequencies.

-Jeff


 John E Blacet wrote:
> 
> Anybody played with this dual VCO chip? It has a very short data sheet
> but looks pretty interesting. In particular, it says " Linear and
> exponential control" but does not indicate how this is typically
> configured. Also says "three types of sync" but only shows two inputs.
> I love the puzzle of data sheets!
> 
> John