YASH sample and hold 

As I understand it, droop rate and hold step both improve a factor of 10 with a factor of 10 increase in the hold capacitor, but acquisition time increases by about a factor of 10. I used Schmitz's values but they say "The timing of the sample pulse is aimed at fast aquisition (i.e. short pulse) at the cost of less precise capture. Mainly to mimic the sound of low sample rates." which I'm not sure I fully understand. Anyway, a 10 nF or larger cap should bring the droop down but the clock pulse would have to be lengthened to 30 µs or more. Not sure how wide the clock pulse can go before it becomes a problem, I suppose 30 µs should be fine. I think I have another LF398 so I can try breadboarding it sometime. I see MFOS's (discrete) S&H uses a sample time of 100 µs and a 10 nF hold cap (musicfromouterspace.com/analogsynth_new/SMPLANDHOLD200607/SMPLANDHOLD200607.php ).

Good question, someone's paying attention! The quantizer's kind of overkill if all you want is S&H. Additionally the quantizer has no internal clock and no track and hold functionality.

@@analog_output Ah ha, all makes perfect sense - thank you :)

Sounds like you need a quantizer ru-vid.com/video/%D0%B2%D0%B8%D0%B4%D0%B5%D0%BE-qMxHrlizhNU.html (which can act as a sample and hold too)

Yes it seems i do. Its exactly doing what ik like to have. Thanks