[sdiy] Best AVAILABLE OTA for building new designs?

[David G Dixon]

My answer to those questions is very simple: 2164.  I haven't used an OTA for 12 years.  And I am constantly discovering new and exciting ways to use 2164.  Just recently, I figured out how to control many different 2164s as linear amplifiers from a single 2164 logarithmic source.  They are exceptionally easy to implement in some very elaborate control schemes, as long as you locally buffer the CV.  And they make THE BEST multipliers, if you're clever.
 
I'm just in the process of buying 1000 V2164Ds, so if anybody needs a few for a really good price, hit me up privately.

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From: Synth-diy [mailto:synth-diy-bounces at synth-diy.org] On Behalf Of Dan Snazelle via Synth-diy
Sent: Thursday, August 08, 2024 11:09 AM
To: Synth-Diy mailing list
Subject: [sdiy] Best AVAILABLE OTA for building new designs?


[CAUTION: Non-UBC Email]	
imagine someone asked you to make some new synth modules.
then imagine that the last time you did so in any quantity above one---  it was 2017. 


I am trying to get a handle on what the parts landscape is like now for cost-effective CV control. Back in 2017 the lm13700 was really the only available OTA . I was just starting to work with the ssm2164 at the time but never used it extensively.

In the interim I have built synth circuits but only in quantities of one where cost was no object and I was able to rely on my own extensive parts supply. 


So my question is this-- if I am thinking about design for manufacturing—what do you think the best option is? 

Has anyone tried the quad ALFA OTA? Is it even readily available? Same for the new SSM2040​.  

OR would you just use the 2164 instead? 
OR would you just try to make discrete OTAS out of say the  BCM856DS //BCM847BS

thanks for any and all opinions on this. 








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