From ae32b00d0e6314be5517e8d815268670e61fc048 Mon Sep 17 00:00:00 2001
From: DC6GF <dc6gf@darc.de>
Date: Thu, 26 Feb 2026 08:30:47 +0100
Subject: [PATCH 1/3] Rename unit Bit from b to Bit to be in line with the
 official questions

---
 assets/latex.js | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/assets/latex.js b/assets/latex.js
index 00b5a3e..3fbb3b6 100644
--- a/assets/latex.js
+++ b/assets/latex.js
@@ -142,7 +142,7 @@ document.addEventListener("DOMContentLoaded", function() {
         "\\Ohm": "\\Omega",
         "\\weber": "\\text{Wb}",
         "\\tesla": "\\text{T}",
-        "\\bit": "\\text{b}",
+        "\\bit": "\\text{Bit}",
         "\\baud": "\\text{Bd}",
         "\\degreeCelsius": "\\,\\degree\\text{C}",
         "\\liter": "\\text{l}",

From b271bebec92cd0fcd9d8cc255620ccbf14e430f9 Mon Sep 17 00:00:00 2001
From: Matthias Jung <m.jung@uni-wuerzburg.de>
Date: Sat, 28 Feb 2026 22:40:42 +0100
Subject: [PATCH 2/3] feature: add sourcecoder, channelcoder and mapper

---
 latex/settings.tex | 85 ++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 85 insertions(+)

diff --git a/latex/settings.tex b/latex/settings.tex
index a45482b..1310043 100644
--- a/latex/settings.tex
+++ b/latex/settings.tex
@@ -1063,3 +1063,88 @@
     \circuitikzbasekey/bipole/is voltageoutsideofsymbol=true}
 
 \makeatother
+
+
+
+% Channel Coder
+\makeatletter
+\ctikzset{bipoles/channelcoder/width/.initial=.7}
+
+\pgfcirc@define@twoports{blocks}
+{}
+{\ctikzvalof{bipoles/channelcoder/width}}
+{channelcoder}
+{\ctikzvalof{bipoles/channelcoder/width}}
+{\ctikzvalof{bipoles/channelcoder/width}}
+{
+    \pgfcirc@twoport@draw@splitline
+    %
+    \pgf@circ@text@strokecolor
+    \pgftext[center,x=0.55\pgf@circ@res@left,y=0.6\pgf@circ@res@up]{\tiny 01}
+    \pgftext[center,x=0.30\pgf@circ@res@right,y=0.6\pgf@circ@res@down]{\tiny 01+01}
+}
+
+\pgfcirc@activate@bipole@simple{l}{channelcoder}
+\makeatother
+
+% Source Coder
+\makeatletter
+\ctikzset{bipoles/sourcecoder/width/.initial=.7}
+
+\pgfcirc@define@twoports{blocks}
+{}
+{\ctikzvalof{bipoles/sourcecoder/width}}
+{sourcecoder}
+{\ctikzvalof{bipoles/sourcecoder/width}}
+{\ctikzvalof{bipoles/sourcecoder/width}}
+{
+    \pgfcirc@twoport@draw@splitline
+    %
+    \pgf@circ@text@strokecolor
+    \pgftext[center,x=0.30\pgf@circ@res@left,y=0.6\pgf@circ@res@up]{\tiny 0101}
+    \pgftext[center,x=0.55\pgf@circ@res@right,y=0.6\pgf@circ@res@down]{\tiny 01}
+}
+
+\pgfcirc@activate@bipole@simple{l}{sourcecoder}
+\makeatother
+
+% Mapper
+\makeatletter
+\ctikzset{bipoles/mapper/width/.initial=.7}
+
+\pgfcirc@define@twoports{blocks}
+{}
+{\ctikzvalof{bipoles/mapper/width}}
+{mapper}
+{\ctikzvalof{bipoles/mapper/width}}
+{\ctikzvalof{bipoles/mapper/width}}
+{
+    \pgfcirc@twoport@draw@splitline
+    %
+    \pgf@circ@text@strokecolor
+    \pgftext[center,x=0.55\pgf@circ@res@left,y=0.6\pgf@circ@res@up]{\tiny 01}
+    %
+    \pgfpathmoveto{\pgfpoint{0.50\pgf@circ@res@right}{-0.25\pgf@circ@res@up}}
+    \pgfpathlineto{\pgfpoint{0.50\pgf@circ@res@right}{-0.75\pgf@circ@res@up}}
+    \pgfusepath{draw}
+    %
+    \pgfpathmoveto{\pgfpoint{0.25\pgf@circ@res@right}{-0.50\pgf@circ@res@up}}
+    \pgfpathlineto{\pgfpoint{0.75\pgf@circ@res@right}{-0.50\pgf@circ@res@up}}
+    \pgfusepath{draw}
+    %
+    \pgfpathcircle{\pgfpoint{0.65\pgf@circ@res@right}{-0.65\pgf@circ@res@up}}{0.05\pgf@circ@res@up}
+    \pgfusepath{fill}
+    %
+    \pgfpathcircle{\pgfpoint{0.35\pgf@circ@res@right}{-0.65\pgf@circ@res@up}}{0.05\pgf@circ@res@up}
+    \pgfusepath{fill}
+    %
+    \pgfpathcircle{\pgfpoint{0.65\pgf@circ@res@right}{-0.35\pgf@circ@res@up}}{0.05\pgf@circ@res@up}
+    \pgfusepath{fill}
+    %
+    \pgfpathcircle{\pgfpoint{0.35\pgf@circ@res@right}{-0.35\pgf@circ@res@up}}{0.05\pgf@circ@res@up}
+    \pgfusepath{fill}
+    %
+}
+
+\pgfcirc@activate@bipole@simple{l}{mapper}
+\makeatother
\ No newline at end of file

From 5f6b0e76823a33c1fbc7002ad71e58d92838c6ac Mon Sep 17 00:00:00 2001
From: Matthias Jung <m.jung@uni-wuerzburg.de>
Date: Sat, 28 Feb 2026 23:39:47 +0100
Subject: [PATCH 3/3] feature: add also decoder and demapper

---
 latex/settings.tex | 84 ++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 84 insertions(+)

diff --git a/latex/settings.tex b/latex/settings.tex
index 1310043..4bfe1e3 100644
--- a/latex/settings.tex
+++ b/latex/settings.tex
@@ -1087,6 +1087,28 @@
 \pgfcirc@activate@bipole@simple{l}{channelcoder}
 \makeatother
 
+% Channel Decoder
+\makeatletter
+\ctikzset{bipoles/channeldecoder/width/.initial=.7}
+
+\pgfcirc@define@twoports{blocks}
+{}
+{\ctikzvalof{bipoles/channeldecoder/width}}
+{channeldecoder}
+{\ctikzvalof{bipoles/channeldecoder/width}}
+{\ctikzvalof{bipoles/channeldecoder/width}}
+{
+    \pgfcirc@twoport@draw@splitline
+    %
+    \pgf@circ@text@strokecolor
+    \pgftext[center,x=0.25\pgf@circ@res@left,y=0.6\pgf@circ@res@up]{\tiny 01+01}
+    \pgftext[center,x=0.55\pgf@circ@res@right,y=0.6\pgf@circ@res@down]{\tiny 01}
+}
+
+\pgfcirc@activate@bipole@simple{l}{channeldecoder}
+\makeatother
+
+
 % Source Coder
 \makeatletter
 \ctikzset{bipoles/sourcecoder/width/.initial=.7}
@@ -1108,6 +1130,27 @@
 \pgfcirc@activate@bipole@simple{l}{sourcecoder}
 \makeatother
 
+% Source Decoder
+\makeatletter
+\ctikzset{bipoles/sourcedecoder/width/.initial=.7}
+
+\pgfcirc@define@twoports{blocks}
+{}
+{\ctikzvalof{bipoles/sourcedecoder/width}}
+{sourcedecoder}
+{\ctikzvalof{bipoles/sourcedecoder/width}}
+{\ctikzvalof{bipoles/sourcedecoder/width}}
+{
+    \pgfcirc@twoport@draw@splitline
+    %
+    \pgf@circ@text@strokecolor
+    \pgftext[center,x=0.55\pgf@circ@res@left,y=0.6\pgf@circ@res@up]{\tiny 01}
+    \pgftext[center,x=0.30\pgf@circ@res@right,y=0.6\pgf@circ@res@down]{\tiny 0101}
+}
+
+\pgfcirc@activate@bipole@simple{l}{sourcedecoder}
+\makeatother
+
 % Mapper
 \makeatletter
 \ctikzset{bipoles/mapper/width/.initial=.7}
@@ -1147,4 +1190,45 @@
 }
 
 \pgfcirc@activate@bipole@simple{l}{mapper}
+\makeatother
+
+% Demapper
+\makeatletter
+\ctikzset{bipoles/demapper/width/.initial=.7}
+
+\pgfcirc@define@twoports{blocks}
+{}
+{\ctikzvalof{bipoles/demapper/width}}
+{demapper}
+{\ctikzvalof{bipoles/demapper/width}}
+{\ctikzvalof{bipoles/demapper/width}}
+{
+    \pgfcirc@twoport@draw@splitline
+    %
+    \pgf@circ@text@strokecolor
+    %
+    \pgfpathmoveto{\pgfpoint{0.50\pgf@circ@res@left}{+0.25\pgf@circ@res@up}}
+    \pgfpathlineto{\pgfpoint{0.50\pgf@circ@res@left}{+0.75\pgf@circ@res@up}}
+    \pgfusepath{draw}
+    %
+    \pgfpathmoveto{\pgfpoint{0.25\pgf@circ@res@left}{+0.50\pgf@circ@res@up}}
+    \pgfpathlineto{\pgfpoint{0.75\pgf@circ@res@left}{+0.50\pgf@circ@res@up}}
+    \pgfusepath{draw}
+    %
+    \pgfpathcircle{\pgfpoint{0.65\pgf@circ@res@left}{+0.65\pgf@circ@res@up}}{0.05\pgf@circ@res@up}
+    \pgfusepath{fill}
+    %
+    \pgfpathcircle{\pgfpoint{0.35\pgf@circ@res@left}{+0.65\pgf@circ@res@up}}{0.05\pgf@circ@res@up}
+    \pgfusepath{fill}
+    %
+    \pgfpathcircle{\pgfpoint{0.65\pgf@circ@res@left}{+0.35\pgf@circ@res@up}}{0.05\pgf@circ@res@up}
+    \pgfusepath{fill}
+    %
+    \pgfpathcircle{\pgfpoint{0.35\pgf@circ@res@left}{+0.35\pgf@circ@res@up}}{0.05\pgf@circ@res@up}
+    \pgfusepath{fill}
+    %
+    \pgftext[center,x=0.55\pgf@circ@res@right,y=-0.6\pgf@circ@res@up]{\tiny 01}
+}
+
+\pgfcirc@activate@bipole@simple{l}{demapper}
 \makeatother
\ No newline at end of file