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Hello,<br>
<br>
Jie did a layout of the adapter board. See attached and her message
below.<br>
We are now wondering if we have time to make a test board or if we
should <br>
just make the 16 boards right now. If we get a test board done
through some<br>
company , it will probably take too long to then make the rest of
them.<br>
<br>
Can JLab make these on the quick?<br>
<br>
Thanks,<br>
<br>
Michael <br>
<br>
<pre class="moz-signature" cols="72">--
Michael Gericke (Ph.D., Professor)
Physics and Astronomy
University of Manitoba
30A Sifton Road, 213 Allen Bldg.
Winnipeg, MB R3T 2N2, Canada</pre>
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<th valign="BASELINE" nowrap="nowrap" align="RIGHT">Subject:
</th>
<td>Silicon detector to QWAD adapter board design</td>
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<th valign="BASELINE" nowrap="nowrap" align="RIGHT">Date: </th>
<td>Thu, 24 Oct 2019 09:10:08 -0500</td>
</tr>
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<th valign="BASELINE" nowrap="nowrap" align="RIGHT">From: </th>
<td>Jie Pan <a class="moz-txt-link-rfc2396E" href="mailto:Jie.Pan@umanitoba.ca"><Jie.Pan@umanitoba.ca></a></td>
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<th valign="BASELINE" nowrap="nowrap" align="RIGHT">To: </th>
<td>Michael Gericke <a class="moz-txt-link-rfc2396E" href="mailto:mgericke@physics.umanitoba.ca"><mgericke@physics.umanitoba.ca></a></td>
</tr>
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<div class="" style="margin:0cm 0cm 0.0001pt;
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<span class="" style="font-size:11pt">Hi Michael,</span></div>
<div class="" style="margin:0cm 0cm 0.0001pt;
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<span class="" style=""><br class="">
</span></div>
<div class="" style="margin:0cm 0cm 0.0001pt;
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<span class="" style="">The adapter board design is
done. It is a little bit later than initially
planned, as the CMC server had issues for about 2
days since Sunday night. </span></div>
<div class="" style="margin:0cm 0cm 0.0001pt;
font-size:11pt; font-family:Calibri,sans-serif">
<span class="" style="font-size:11pt">I put schematic
and PCB source files as well as PDF files in a
compressed folder, see attached. Please note that:</span><br
class="">
</div>
<p class="" style="margin:0cm 0cm 0.0001pt;
font-size:11pt; font-family:Calibri,sans-serif">
<span class="" style=""> </span></p>
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type="disc">
<li class="" style="margin:0cm 0cm 0.0001pt 36pt;
font-size:11pt; font-family:Calibri,sans-serif">
<span class="" style="">The board width is the same
with French board, but I increased the length for
2 cm (i.e. 2 cm longer than the French board) in
order to avoid possible interference between crate
front edge and the QWAD board.
</span></li>
</ul>
<p class="" style="margin:0cm 0cm 0.0001pt;
font-size:11pt; font-family:Calibri,sans-serif">
<span class="" style=""> </span></p>
<ul class="" style="margin-top:0cm; margin-bottom:0cm"
type="disc">
<li class="" style="margin:0cm 0cm 0.0001pt 36pt;
font-size:11pt; font-family:Calibri,sans-serif">
<span class="" style="">The DB50 connector to QWAD
is shifted upward so that the bottom of QWAD will
be flush with slot inside the crate. Because the
clearance of the underside of QWAD is unknown,
this will make sure QWAD can be mounted with
enough clearance.</span></li>
</ul>
<p class="" style="margin:0cm 0cm 0.0001pt;
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<span class="" style=""> </span></p>
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type="disc">
<li class="" style="margin:0cm 0cm 0.0001pt 36pt;
font-size:11pt; font-family:Calibri,sans-serif">
<span class="" style="">The board has 4 layers. Top
& bottom layers are used as shielding and the
signal traces are routed on two middle layers.</span></li>
</ul>
<p class="" style="margin:0cm 0cm 0.0001pt;
font-size:11pt; font-family:Calibri,sans-serif">
<span class="" style=""> </span></p>
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type="disc">
<li class="" style="margin:0cm 0cm 0.0001pt 36pt;
font-size:11pt; font-family:Calibri,sans-serif">
<span class="" style="">There is a jumper used to
select either bias HV or GND for pin48 and pin49
of the crate back plane connector (on my
schematic, the jumper is for pin49 and pin50. This
is because my crate connector's pins are counted
from 1 instead of from 0). </span></li>
</ul>
<p class="" style="margin:0cm 0cm 0.0001pt;
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<span class="" style=""> </span></p>
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type="disc">
<li class="" style="margin:0cm 0cm 0.0001pt 36pt;
font-size:11pt; font-family:Calibri,sans-serif">
<span class="" style="">There is a 2:1 attenuator
for each channel. This attenuation ratio can be
easily changed by choosing different values of
resistors.</span></li>
</ul>
<p class="" style="margin:0cm 0cm 0.0001pt;
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<span class="" style=""><span class="" style=""> </span></span></p>
<div class="" style="margin:0cm 0cm 0.0001pt;
font-size:11pt; font-family:Calibri,sans-serif">
<span class="" style=""><span class="" style="">Jie</span></span></div>
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