polish intro, theory and setup with annotated figures
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@ -56,7 +56,7 @@ def gen_reticle_empty():
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ax.axis('off')
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ax.set_aspect("equal")
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plt.savefig('wafer.pdf')
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plt.savefig('wafer.pdf', transparent=True)
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def gen_reticle_patterns():
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plt.clf()
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@ -0,0 +1,4 @@
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\begin{tikzpicture}
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\node[anchor=south west,inner sep=0] at (0,0) {\includegraphics[width=\textwidth]{some_image.jpg}};
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\draw[red,ultra thick,rounded corners] (7.5,5.3) rectangle (9.4,6.2);
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\end{tikzpicture}
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@ -15,7 +15,12 @@ THe first setup was used during the calibration phase, while the secon setup was
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\centering
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\includegraphics[width=.35\columnwidth]{./pics/setup_ps_el_mm.jpg}
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\includegraphics[width=.45\columnwidth]{./pics/poweritv1_test_setup_corr.jpg}
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\caption{Left: Keithley K2100 voltmeter (top), PS9080 bench power supply (middle) and EL9000 electronic load (bottom; Right: PowerIt with connected STM32-Discovery board (left), and Raspberry PI (top). as well as power supply connection (cables at top ow PIT)}%
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\caption{%
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Photographs of the first experimental setup.
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On the left side visible are a Keithley K2100 voltmeter (top), a PS9080 bench power supply (middle) and a EL9000 electronic load (bottom).
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On the right side visible are a PowerIt with connected STM32-Discovery board (left), and Raspberry PI (top).
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Also in the picture is the power supply connection (cables at top of PowerIt).%
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}%
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\label{fig:expsetup1}
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\end{figure}
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@ -24,8 +29,27 @@ THe first setup was used during the calibration phase, while the secon setup was
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\subsection{Part 2}
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To obtain the required measurements for creating a regulation model the second setup was used.
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%TODO: add picture for wafer setup
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To obtain the required measurements for creating a regulation model the second setup was used (\autoref{fig:expsetup2}).
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\begin{figure}[H]
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\centering
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\includegraphics[height=.55\columnwidth]{tikz/setup2.pdf}
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\hspace{1.5cm}
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\includegraphics[height=.53\columnwidth]{pics/setup_pw_back_2.png}
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\caption{%
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Photographs of the second experimental setup.
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In this setup the Wafer system assembly was used.
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This module has a height and length of 50cm and a width of 15cm.
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The left side shows the back side of the assembly.
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Here are the PowerIt (1), CURE (3) and AnaB (2) boards mounted, as well as a RaspberryPi (4) and a STM32-Discovery (5).
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The right side shows the empty front side of the MainPCB and the wafer heatsink.%
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}%
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\label{fig:expsetup2}
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\end{figure}
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This setup is similar to a BrainScaleS wafer module as it exists inside the system.
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But in contrast to these systems there are no FPGAs, AuxPwr or FCP boards (reference~\cite{waferembedding},fig 2.2)
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The MainPCB has the PowerWafer embedded and is also connected to 8 CURE boards, 2 AnaBs and a PowerIt.
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\section{Characterization}
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@ -5,7 +5,7 @@
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\section{The BrainScale System}
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The BrainScale Wafer System~\cite{hbpguidebook}, developed and used in the electronic visions group at Heidelberg University is a neuromorphic hardware implementation.\\~\\
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The BrainScale Wafer System, developed and used in the electronic visions group at Heidelberg University is a neuromorphic hardware implementation~\cite{waferembedding}.\\~\\
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For this thesis the following core components are of importance:
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\begin{itemize}
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@ -28,16 +28,8 @@
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\begin{figure}[h]
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\centering
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\includegraphics[width=.7\textwidth]{pics/poweritv2_teststand_2}
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\caption{PowerIt board, top view, receiving \SI{48}{\volt} as input (
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%TODO: color
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) and outputting \SI{9.6}{\volt} (
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%TODO: color
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) as well as \SI{1.8}{\volt} (analog:
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%TODO: color
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; digital:
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%TODO: color
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)}\label{fig:pitteststand}
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\includegraphics[width=.7\textwidth]{./tikz/powerit.pdf}
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\caption{PowerIt board, top view, receiving \SI{48}{\volt} as input (magenta) and outputting \SI{9.6}{\volt} (green) as well as \SI{1.8}{\volt} (analog: red, digital: blue)}\label{fig:pitteststand}
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\end{figure}
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The brain of these PowerIt boards is a STM32 Chip\footnote{STM32F405RGT~\cite{stm32f405xx}} which runs a custom firmware based on ChibiOS~\cite{chibios}.
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@ -224,24 +224,42 @@ On the other hand, to calculate the voltage to output, it is necessary to classi
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\begin{figure}[H]
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\centering
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\includegraphics[width=.7\columnwidth]{./data/theory/wafer.pdf}
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\includegraphics[width=.6\columnwidth]{./data/theory/wafer.pdf}
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\caption{Reticle diagram of a wafer in BrainScaleS. All 48 Reticles are shown}%
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\label{fig:wafer}
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\end{figure}
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\begin{figure}[H]
|
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\centering
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\includegraphics[width=.7\columnwidth]{./pics/waferpcb.png}
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\caption{Part of the main pcb on which a wafer is placed, visible are the 48 Reticles and two terminals each for 1.8V Digital (blue) and Analog (red), which correspond to the output terminals on a PowerIt, a reticles dimensions are \SI{2.0077}{\centi\meter} by \SI{2.0077}{\centi\meter}}%
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\includegraphics[width=.8\columnwidth]{./tikz/mainpcb_back.pdf}
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\caption{A photograph of the top of the MainPCB (courtesy of Maurice G\"{u}ttler~\cite{waferembedding}).
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The board has a length and width of 43cm.
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Visible in the center are the PowerFETs (Field Effect Transistors) (1) which switch the power supply of each reticle.
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These are controlled via the CURE boards.
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In yellow the corresponding Reticle and its position is marked.
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The CUREs are placed at the 8 central positions (2).
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The top-left and bottom right corner connectors (3) are for the AnaB boards.
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The main supply voltages V\(_\text{DDA}\) (red) and V\(_\text{DDD}\) (blue) are generated on the PowerIt and inserted at the marked screw connections.}%
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\label{fig:mainpcb}
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\end{figure}
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% \begin{figure}[H]
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% \centering
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% \includegraphics[width=.7\columnwidth]{./pics/waferpcb.png}
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% \caption{Part of the main pcb on which a wafer is placed, visible are the 48 Reticles and two terminals each for 1.8V Digital (blue) and Analog (red), which correspond to the output terminals on a PowerIt, a reticles dimensions are \SI{2.0077}{\centi\meter} by \SI{2.0077}{\centi\meter}}%
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% \label{fig:mainpcb}
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% \end{figure}
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It has the same layout as its system counterparts and each of the 48 reticles can be accessed, digitally as well as electrically.
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Each reticle is connected to its corresponding CURE board.
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Those can read voltages of each reticle, but not at the same position as an AnaB.
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They read right before \(R_1\) in \autoref{fig:retmodel}.
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Another specialization of the PowerWafer is, that all reticles analog and digital \SI{1.8}{\volt} lines are connected directly to pins on the analog readout boards~\cite{anabpower}. There it is possible to measure a voltage, which is the one after the load resistors in \autoref{fig:retmodel}
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And like its system counterparts it is placed on a MainPCB (see \autoref{fig:mainpcb}).
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All CURE boards connect to it and control the PowerFETs, as well as provide voltage readout from each reticle.
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The CURE boards read right before \(R_1\) in \autoref{fig:retmodel}.
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Also on the MainPCB are the AnaB boards.
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Note that here lies another specialization of the PowerWafer.
|
||||
All reticles' analog and digital \SI{1.8}{\volt} lines are connected directly to pins on the analog readout boards~\cite{anabpower}.
|
||||
There it is possible to aaccess a voltage, which is measured after the load resistors in \autoref{fig:retmodel}
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(after \cite{waferembedding})
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\subsection{Simple Wafer Resistance Model (SWRM)}\label{sec:swrm}
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BIN
thesis.pdf
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@ -18,9 +18,9 @@
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\NoIndentAfterEnv{figure}
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\NoIndentAfterEnv{align}
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\titleformat{\chapter}{\bfseries\huge\color{myteal}}{\thechapter}{.5em}{}
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\titleformat*{\section}{\bfseries\Large\color{myteal}}
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\titleformat*{\subsection}{\bfseries\large\color{myteal}}
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\titleformat{\chapter}{\bfseries\huge}{\thechapter}{.5em}{}
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\titleformat*{\section}{\bfseries\Large}
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\titleformat*{\subsection}{\bfseries\large}
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|
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\author{Patrick Nisblé}
|
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\title{\color{myteal}Calibration and Regulation of BrainScaleS' PowerIt Subsystems}
|
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|
|
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@ -0,0 +1,18 @@
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\documentclass{standalone}
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\input{./tikzpreamble}
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\begin{scope}[x={(image.south east)},y={(image.north west)}]
|
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@ -0,0 +1,18 @@
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