Doepfer

Florian,

so we are back to the A-152 ?

The A-152 includes both: clocked (or voltage controlled) 1to8 switch and
8-fold T&H (can be changed to S&H, Christian has already a S&H version of
the A-152 available).

Dieter

> -----Ursprüngliche Nachricht-----
> Von: Doepfer_a100@yahoogroups.com
> [mailto:Doepfer_a100@yahoogroups.com]Im Auftrag von Florian Anwander
> Gesendet: Mittwoch, 8. Juni 2005 14:34
> An: Doepfer_a100@yahoogroups.com
> Betreff: Re: AW: [Doepfer_a100] Re: exotic new modules ideas anyone?
>
>
> Hello Dieter
>
> > If I'm not mistaken 8 S&H's and switches are required for a 4
> stage analog
> > shift register (similar to the BBDs) as you need a n additional
> slave S&H
> > for each stage.
> I do not think, you need an additional slave S&H, if you decouple not
> only the s&h with the input selector, but also the trigger, which clocks
> the s&h.
>
> > This is required to have the analogue value available to
> > forward it to the following stage as the preceeding S&H already is
> > "reloaded" from the stage before.
> I would avoid to forward the content of one stage to the other (causes
> voltage loss and adds noise). Instead of, I suggest to use a clocked
> 1to8 switch, to switch the output of one s&h-stage to the eight outputs.
>
> Let me try ASCII sketch (you need courier as font for this):
>
>
> |--common part--|--for each stage-------|
>
>            +-...        +------out-bus-5
>            |            |
>            +-...        +------out-bus-6
>            |            |
>            +-...        +------out-bus-7
>            |            |
>            +-...        +------out-bus-8
> CV in o---|            |
>            +-----s&h_5--+------out-bus-1
>            |      |     |
>            +-...  |     +------out-bus-2
>            |      |     |
>            +-...  |     +------out-bus-3
>            |      |     |
>            +-...  |     +------out-bus-4
>         CD4051    |   CD4051
>                   |
>            +-...  |
>            |      |
>            +-...  |
>            |      |
>            +-...  |
>            |      |
>            +-...  |
>            |      |
> Clock in--|      |
>            +------+
>            |
>            +-...to s&h_6
>            |
>            +-...to s&h_7
>            |
>            +-...to s&h_8
>         CD4051
>
> The assignment of the outputs at the right CD4051 has to change round
> robbing.
>
> Not shown is a adress counter, clocked by the clock, which feeds all
> CD4051 (of course we should not use 4051 because of the know pitfalls).
> The outbut buses should not require adders, becaus always only one
>
>
>
> Florian
>
>
>
>
> Yahoo! Groups Links
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>