Sean H. Breheny wrote:
>
> Hi Annie,
>
> When I hear "bucket brigade device" I think of a low-frequency digital
> "delay line" type device,not intended to record and then playback at a
> later time. Perhaps the usage is really a bit broader than that,however,as
> you say.
>
> I'm not sure where the limitation is. As I understand it, ISD's chips work
> like an analog EEPROM,and actually use EEPROM-like cells to store the data.
> Perhaps they do some kind of trick (like buffering the sound) to program
> the cells which would cause problems with simultaneous read and write.
>
> BTW, I am curious,what does your device do?
>


>From some cryptic reference in ISD's glossies about how they could do this
and their competition couldn't, I suspect they're basicly using a bucket brigade
,
 but somehow are keeping the charge in the bucket. Your 'analog EPROM' isn't
Certainly the ISD devices are supposed to keep a sound for long many years.



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Anniepoo
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