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RE: AW: [Doepfer_a100] BBDs as CV-recorders for theremin or ribboncontroller

2005-06-06 by esa kotala

Hi Dieter,

>yes. BBDs are an array of very small capacitors and FETs (used as switche
>that pass on the the voltage of a stage to the following stage, a little 
>bit
>like a S&H, that's why it's calle "bucket brigade"). The capacitors are 
>able
>to hold the voltage only a limited time (I assume in the 100ms range but in
>the data sheets of BBDs this parameter is not specified) and there is a 
>loss
>during each stage - same as for a real bucket brigade where some water 
>drops
>may be lost in each stage.

Ah, so there are two ways of losing voltage: one when passing it, and 
another while storing it. It's like a bucket brigade with holes in the 
buckets!

- esa

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