[sdiy] (Speaking of...)CCD as BBD????

[Rob]

What about breaking out the microscope and wiring into various places on the
ccd directly so that you can apply a voltage to an individual cell and then
let them run through the bbd structure of the ccd?

That would be much easier.

Rob

----- Original Message -----
From: "VINTVOLT" <VINTVOLT at terra.es>
To: <synth-diy at node12b53.a2000.nl>
Sent: Friday, February 09, 2001 1:33 PM
Subject: [sdiy] (Speaking of...)CCD as BBD????


> Hi!
> I've been into camera technology recently and got quite involved in CCD
> devices and their operation theory. Esentialy they are like a BBD but
> laid out in a square matrix. Also, the input signal (light) not only
> enters the first 'bucket' as it would happen on a BBD but incides on
> all photosensors at once. With a set of commonly 6 clock signals
> Charges are transfered horizontally and vertically to a buffer line
> from where the charges are read out individually to form the continuous
> video signal.
>
> Well, after this short intro, let me tell you my weird idea: Recycle a
> CCD to use it as a BBD!
> <insert mad scientist laugh here >
>
> First, the audio signal should be transformed properly to light using a
> linerized diode or something. The bipolar audio signal should be offset
> so that 'barely no light' is in fact a negative audio voltage?
>
> Then, this light should be applied to one single cell of the CCD. How?
> I don't know, maybe a mask with a tiny hole? Depending on what cell you
> are driving, you shold get different delay times (?)
>
> The transfer pulses should be slowed down as to get usable delay times
> for audio...
>
> Theorically it is a good idea (IMHO) but could it be feasible?
> Imagine a BBD with 1 Millon buckets :)
>
> Now anyone got a spare camera and a screwdriver?
>
> --
> Carles Vila
> Departament d'Acústica
> Enginyeria la Salle
> Barcelona, Spain
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