[sdiy] Servo / Hold?

[John L Marshall]

Jerald Graeme in his book "Applications of Operational Amplifiers" show
several more complicated circuits that improve S&H droop.


Take care,
John
www.sound-photo.com
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----- Original Message -----
From: "Tim Parkhurst" <tparkhurst at siliconbandwidth.com>
To: <synth-diy at dropmix.xs4all.nl>
Sent: Wednesday, February 12, 2003 10:29 AM
Subject: [sdiy] Servo / Hold?


> Hi All,
>
> Just a real quick idea that I wanted to bounce off the group: I was trying
> to think of some sort of feedback circuitry that would act like a servo
(or
> a DC PLL I guess) that could compensate for the droop in a S/H capacitor.
Is
> this possible, or would it cause more problems than it would solve? Has
> something like this been done before? Perhaps there could be a circuit in
> the feedback loop that would output a voltage proportional to the amount
of
> change in the 'stored' voltage (and therefore compensate for the droop).
Of
> course, it sounds like this feedback circuit would use capacitors to store
> charges and so becomes another S/H itself (which defeats the whole purpose
> of the thing). Maybe it would be easier to just do it digitally... ;)
>
> Any thoughts?
>
> Tim Servo
> "Imagination is more important than knowledge." - Albert Einstein
>
>
>
>
>
>
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