diff --git a/parts/experiments.tex b/parts/experiments.tex index f42236b..7e719f8 100644 --- a/parts/experiments.tex +++ b/parts/experiments.tex @@ -171,7 +171,7 @@ Wanting to observe and characterize the voltage drop, happening between the Powe \centering \hspace*{-.16\columnwidth} \includegraphics[width=1.3\columnwidth]{../pitstop/20180727/ret_vdip.pdf} - \caption{Voltage dip observed between PowerIt and HICANN, each point represents the state after enabling additional Reticles on the PowerWafer} + \caption{Voltage dip observed between PowerIt and HICANN, each point represents the state after enabling additional Reticles on the PowerWafer (\pyval{0})} \label{1v8dip} \end{figure} diff --git a/parts/theory.tex b/parts/theory.tex index a987a74..1297a33 100644 --- a/parts/theory.tex +++ b/parts/theory.tex @@ -16,21 +16,21 @@ Each of the three voltage regimes that will be observed on the PowerIt Board, ha \end{figure} The circuits for measuring input Voltage and current are the most complex, because for Voltage measurement the circuit needs to -\begin{enumerate} +\begin{itemize} \item divide our input voltage into a usable potential range \item decouple the input from our signal potential \item operate within the Chips possible Voltage range of 0 -- 3.3V -\end{enumerate} +\end{itemize} -The already implemented Cicuit can be seen in figure \ref{mon48v}. It consists of a 1:240 Voltage Divider, a full differential operational amplifier taking in the ~200mV (nominal), and amplifying it by a factor of 8 ($r_\text{diffOpAmp}$). It is decoupling the input and output voltages, so our 48V and 3.3V circuit parts are electricly insulated. The remaining operational amplifier provides futher amplification by a factor of 1.1 ($r_\text{OpAmp}$) +The already implemented Cicuit can be seen in \autoref{mon48v}. It consists of a 1:240 Voltage Divider, a full differential operational amplifier taking in the ~200mV (nominal), and amplifying it by a factor of 8 ($r_\text{diffOpAmp}$). It is also decoupling the input and output voltages, so our 48V and 3.3V circuit parts are electricly insulated. The remaining operational amplifier provides futher amplification by a factor of 1.1 ($r_\text{OpAmp}$) -This circuit results in the following equation: +This circuit results in the following equation for calculating the input voltage from a pin voltage: \begin{equation} V_\text{48V in}\cdot\frac{R_1}{R_1+R_2} \cdot r_\text{diffOpAmp} \cdot r_\text{OpAmp} = V_\text{48V pin} \end{equation} -% and the expected behavior, as seen in \ref{beh48v} +% and the expected behavior, as seen in \autoref{beh48v} % % \begin{figure}[h] % \centering @@ -120,12 +120,25 @@ Like its counterparts, it has the same Layout and each of the 48 Reticles can be accessed, digitaly as well as electricaly. -For this work the following circuit can be used to describe the connections, powering these Reticles. +For this work the circuit model in \autoref{retmodel} can be used to describe the connections, powering these Reticles. \begin{figure}[H] \centering - %TODO: unclude simplified resistor ladder - \includegraphics[width=1.3\paperwidth]{<`4`>} - \caption{<`5`>} - \label{<`6`>} + \includegraphics[width=.4\columnwidth]{./tikz/reticlepower.pdf} + \caption{model of the to measure resistances and their currents, $R_0$ describes the resistance of a connection between the PowerIt Output and up to the switch, while $R_1$ is a Resistance between the switches and Reticles. } + \label{retmodel} \end{figure} + +This model allowes for two fixed resistance values and their respective currents. The current flowing through $R_1$ will be either 0 or a constant current $I_{ret}$. The current through $R_0$ will change depending on the number of reticles that are powered $n_{ret}$ + +\begin{align} + I_{ges} = n_{ret} \cdot I_{ret} +\end{align} + +Therefore the voltage Differential as measured by a Voltmeter (\autoref{retmodel}) can be described as in \autoref{eq:vdip} + +\begin{align} \label{eq:vdip} + V_{dip} =&\ V_{R_1} + V_{R_0} \nonumber\\ + =&\ R_1 \cdot I_{ret} + R_0 \cdot I_{ges}(n_{ret}) \nonumber\\ + =&\ I_{ret} \cdot \left( R_1 + R_0 \cdot n_{ret} \right) +\end{align} diff --git a/pics/pit.svg b/pics/pit.svg new file mode 100644 index 0000000..5f52f30 --- /dev/null +++ b/pics/pit.svg @@ -0,0 +1,89 @@ + +image/svg+xml \ No newline at end of file diff --git a/thesis.tex b/thesis.tex index eafc9c2..5bd14d9 100644 --- a/thesis.tex +++ b/thesis.tex @@ -1,5 +1,6 @@ \documentclass[notitlepage, a4]{scrreprt} \input{preamble} +\input{../pitstop/20180729/ret_vals.tex} \usepackage{fontawesome} \pretitle{\begin{center}\huge\bfseries} diff --git a/tikz/reticlepower.pdf b/tikz/reticlepower.pdf index 7ed9616..28a0ce6 100644 Binary files a/tikz/reticlepower.pdf and b/tikz/reticlepower.pdf differ diff --git a/tikz/reticlepower.synctex(busy) b/tikz/reticlepower.synctex(busy) deleted file mode 100644 index e69de29..0000000 diff --git a/tikz/reticlepower.tex b/tikz/reticlepower.tex index c631a54..6f0f9e0 100644 --- a/tikz/reticlepower.tex +++ b/tikz/reticlepower.tex @@ -1,13 +1,32 @@ -\documentclass[convert={outfile=\jobname.svg}]{standalone} +\documentclass[]{standalone} \input{./tikzpreamble} \begin{document} \begin{circuitikz}[scale=2] \draw[color=black, thick] - (0,0) - to [R, l={R0}, short, o-] (0,1) - to [R, l={R1}, short, o-] (0,2) + (0,2.8) + to [short, *-] (-.8,2.8) + to [voltmeter] (-.8,-.35) + to [short, -*] (0,-.35) + + (0,3) + to [R, l={$R_0$}, v_>=$I_{ges}$, o-] (0,1.5) + to [nos, *-] (0,1) + to [R, l={$R_1$}, v_>=$I_{ret}$, -o] (0,-.5) + + (0,1.5) + to [] (.6,1.5) + to [nos, *-] (.6,1) + to [R, l={$R_1$}, -] (.6,-.5) + + (.6,1.5) + to [] (1.2,1.5) + to [nos, *-] (1.2,1) + to [R, l={$R_1$}, -] (1.2,-.5) + + (1.2,1.5) + to [] (1.5, 1.5) node[right]{...} ; \end{circuitikz}