[sdiy] SSM VCA ICs, was Re: BA 6110 & LM13600/13700

[Tom Wiltshire]

On 29 Nov 2007, at 16:00, <neil.johnson97 at ntlworld.com> wrote:

> Hi,
>
> John Mahoney <jmahoney at gate.net> wrote:
>> At 07:12 AM 11/29/2007, Tom Wiltshire wrote:
>>
>>> ...  SSM2024 is an obsolete version of the still-produced
>>> SSM2164 ...
>>
>> They are pin-compatible? I didn't know that. (I could check the
>> datatsheets but I'm just taking a short break from unloading a U-Haul
>> truck, so...)
>
> No, they are not pin-compatible.  And they have different control  
> transfer functions - the SSM2024 is linear, while the SSM2164 is  
> exponential.

Can you tell me any more about that, Neil? The SSM2164 datasheet  
describes the SSM2024 control response as "log/log" whilst the  
SSM2164 is described as "linear/log". That confused me somewhat, so  
if you understand it better, I'd like to know.

T.