From ac03bd723177295d609bcad66e8c6c570849504c Mon Sep 17 00:00:00 2001
From: Jan Michel <j.michel@gsi.de>
Date: Wed, 12 Jun 2013 17:57:52 +0200
Subject: [PATCH] new version

---
 electronics/electronics2013.tex | 28 ++++++++++++++++++++++------
 1 file changed, 22 insertions(+), 6 deletions(-)

diff --git a/electronics/electronics2013.tex b/electronics/electronics2013.tex
index 966b18b..aec0ead 100644
--- a/electronics/electronics2013.tex
+++ b/electronics/electronics2013.tex
@@ -6,7 +6,7 @@
 \date{\today ~-~\thistime}
 \author{Michael Wiebusch, Jan Michel}
 
-\newcommand{\question}[1]{\textcolor{YellowOrange}{#1}}
+\newcommand{\discuss}[1]{\textcolor{YellowOrange}{#1}}
 \newcommand{\agreed}[1]{\textcolor{YellowGreen}{#1}}
 \newcommand{\reject}[1]{\textcolor{BrickRed}{#1}}
 
@@ -26,7 +26,7 @@
 \maketitle
 
 \section*{Legend}
-\question{This is a feature to be discussed}\\
+\discuss{This is a feature to be discussed}\\
 \agreed{Good solution that should be implemented}\\
 \reject{This was a dumb idea}
 
@@ -63,10 +63,11 @@ If there is an AddOn, it could have these features:
 JTAG: TDI,TMS,TCK, TDO& 1/0 & 3/0 \\
 Sensor Data: Clock, Marker, 2x Data per sensor & 8/0 & 0/0 \\
 Sensor Control: Clock, Start, Reset. & 0/0 & 3/0 or 1/2 \\
-ADC for voltages and currents & 2/1 & 2/0 \\
+ADC for voltages and currents (SPI) & 2/1 & 2/0 \\
+Voltage and JTAG switch (SPI) & 0/0 & 3/0 or 2/1 \\
 \hline
-Total v1 & 10/1 & 8/0\\
-Total v2 & 10/1 & 6/2\\
+Total v1 & 10/1 & 11/0\\
+Total v2 & 10/1 & 8/3\\
 \end{tabularx}
 \caption{Inputs/Outputs from the FPGA, first value differential, second single ended}
 \end{table}
@@ -74,8 +75,9 @@ Total v2 & 10/1 & 6/2\\
 
 
 \section{Converter Board}
+\subsection{General Setup}
 \begin{itemize*}
-    \item\question{One (final) converter board serves one ladder (whatever that means, e.g. 5)
+    \item\discuss{One (final) converter board serves one ladder (whatever that means, e.g. 5)
 sensors and has its own JTAG chain} This removes both queue and termination boards.
     \item Design of the converter board should be in a way to easily change the number of sensors,
 i.e. all electronics should be modular, eithre independent for each sensor - or shared between all
@@ -83,12 +85,26 @@ of them.
     \item For the telescope, the board should support two sensors.
 \end{itemize*}
 
+\subsection{Features}
+\begin{itemize*}
+  \item  Jumpers to bridge power supplies of both sensors to test running several sensors in
+parallel, at least for main voltages.
+  \item Additional sense line for ground on sensors. E.g. for temperature measurement
+  \item All converters switchable from FPGA - via SPI to reduce number of lines
+ \end{itemize*}
+
+
 \subsection{Components}
 \begin{itemize*}
   \item ADC, about 1 MSPS. For all voltages and currents for each sensor.
+  \item Inductivities on power rails can be replaced by ferrite beads (less DC resistance, higher
+current, smaller form factor), e.g. BLM41 and similar.
 \end{itemize*}
 
 \section{Converter to Frontend Board}
+First iteration: \discuss{reuse old flex cables}, e.g. have both available cables (from converter
+and from queue board) in parallel or use two of the old cables. \discuss{Later, we can work on an
+optimized cable}:
 \begin{itemize*}
  \item Can use a thick, optimized flex cable
  \item Should foresee to be fed into the vacuum vessel
-- 
2.43.0