[sdiy] substitute for LM307 in voltage to constant-current converter

[James Patchell]

Use a TL071/2/4 or TL051/2/4.

The LM301 require external compensation.  Use a 30pF cap from pin 1 to 8 
if yyou use this part.

-Jim

On 3/11/2012 4:13 PM, aankrom wrote:
> I'm building a circuit for an XR2206 function generator that cleverly 
> uses an opamp driving an FET to provide a current input to the 
> frequency pin of the XR2206. The opamp called for is an LM307. I was 
> wondering if an LM301 would fit the bill, since I have some of those. 
> Looking at datasheets, it looks like the LM301 is more or less just an 
> uncompensated version of the LM307. The circuit is from 1985, when 
> LM307's were easy to be had. I thought since I have even more LM301's 
> in my parts bin than LM741's, I might as well give it a shot.
>
> Any ideas for low frequency compensation if I should decide to 
> modulate this input with an LFO or sweep generator? (Like should Ineed 
> any at all?)
>
> Cheers,
> Anthony
> _______________________________________________
> Synth-diy mailing list
> Synth-diy at dropmix.xs4all.nl
> http://dropmix.xs4all.nl/mailman/listinfo/synth-diy
>