[sdiy] Expo in one chip?

KD KD pic24hj at gmail.com
Sun Dec 31 20:17:42 CET 2017


2017-12-26 23:30 GMT+01:00, Neil Johnson <neil.johnson71 at gmail.com>:
> David
>
>> Can you tell us briefly what these "welcome changes" are?  I, for one,
>> was hoping that they'd put the stupid stability networks on the chip, saving
>> a pile of 560pF caps and 510R resistors.
>
> For one thing, if they did manage to put four 560p caps on the die
> then you wouldn't be able to afford it - the die area would be so
> large the simple cost plus reduction in yield would push the price way
> up, far more than the savings of external components.  So, no, you
> still need external compensation networks on each input.

I had hoped the external input stability filters to be removed
by a upgraded design type Doug Curtis.

> Main improvements are: lower noise, lower distortion, higher control
> pin resistance, and DRUM-ROLL .... they fixed the missing-rail
> self-destruction mechanism.  YAY!!!!!

All i can see/read is the usual protection diode between -V and AG,
datasheet page 3.
5k to 10k are'nt much, one could have hoped for a "open base summing point"
upgrade instead.


More information about the Synth-diy mailing list