[Halld-tracking-hw] Preamps

Fernando J. Barbosa barbosa at jlab.org
Thu Jun 10 11:20:01 EDT 2010


Hi Gerard,

The linearity plots for the ASIC can be found on the 1364 document. 
Those were determined to the 5% level but I agree we need to discuss 
this in the context of the CDC and the FDC requirements.

I will send you the minutes and there is still some work left to 
converge on optimizing the detector parameters for the ASIC.

Thanks and best regards,
Fernando



Gerard Visser wrote:
> Hi Fernando,
>     Yes, understood. You can fill me in on the discussions later, or 
> just send an email of minutes...
>     Besides Naomi's concern of the input range of the ASIC [/ output 
> range of the CDC], we do at some point need to carefully evaluate the 
> "good linear" output range of the ASIC and then finalize the ADC125 
> input stage gain so that that maps correctly to the ADC range. I think 
> we know it is fairly close already, and this does not need to be 
> settled until procurement of production ADC125 parts. But it would be 
> good to make some plots already for this.
>
>     Gerard
>
> Fernando J. Barbosa wrote:
>> Hi all,
>>
>> It seems that Monday @ 10 is preferable to most.
>>
>> Gerard, I will discuss with you any issues related to the preamps and 
>> ASICs afterwards.
>>
>> In preparation for the meeting, I suggest reviewing GlueX docs 1070, 
>> 1079 and 1364. I will send an email with the agenda for the meeting 
>> by the end of the week.
>>
>> Thanks and best regards,
>> Fernando
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