Dc restore circuit

[C.GUILLAUME]

Posted to CCD-world:
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Hi ccd world;

 Since we are building a new generation camera controller, I wonder if
anyone has tried to use dc restore circuits close to the output of a ccd .
Our analog converter is 16 bits large and we plan to read the target 
in sevral windows.
Using a dc blocking capacitor at the input of the preamplifier could
give a non 16 bits linearity due to the capacitor charge. Espcially
at the begining of a window , the previous lines are drainded to the dump.
So we must keep the potential to the good value to avoid capacitor charge
effect.
Burr Brown corp. developped device but only 12 bits, does 16 bits exist ? 
Thanks for your help..
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& Christian  GUILLAUME
& Service Electronique
&   CNRS / IGRAP                                 Tel: (33).04.92.70.64.09
& Observatoire de Haute Provence         Fax: (33).04.92.70.64.64
& 04870 St Michel l'Observatoire        Email: guillaume at obs-hp.fr
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