diff --git a/src/cheatsheets/Digitaltechnik.typ b/src/cheatsheets/Digitaltechnik.typ
index 688e720..8958d3e 100644
--- a/src/cheatsheets/Digitaltechnik.typ
+++ b/src/cheatsheets/Digitaltechnik.typ
@@ -1,8 +1,10 @@
-#import "../lib/common_rewrite.typ" : *
 #import "@preview/mannot:0.3.1"
 #import "@preview/cetz:0.4.2"
 #import "@preview/zap:0.5.0"
+
+#import "../lib/common_rewrite.typ" : *
 #import "../lib/truthtable.typ" : *
+#import "../lib/fetModel.typ" : *
 
 #show math.integral: it => math.limits(math.integral)
 #show math.sum: it => math.limits(math.sum)
@@ -565,10 +567,7 @@
         (cycle_start,signal_hight), (cycle_time*(t_setup + 2), signal_hight), 
         (cycle_time*(t_setup + 2) + switch_offset, 0), (cycle_end + switch_offset, 0), stroke: signal_storke
       )
-    
-
     })
-
   ]
 
 
diff --git a/src/cheatsheets/Schaltungstheorie.typ b/src/cheatsheets/Schaltungstheorie.typ
index 186cc16..cd5a139 100644
--- a/src/cheatsheets/Schaltungstheorie.typ
+++ b/src/cheatsheets/Schaltungstheorie.typ
@@ -108,7 +108,63 @@
   #bgBlock(fill: colorAllgemein)[
     #subHeading(fill: colorAllgemein)[Verschaltung]
 
+    $1/x_"ges" = 1/x_1 + 1/x_2 + 1/x_3 + ...$
 
+    $x_1 parallel x_2 = 1/(1/x_1 + 1/x_2) = (x_1 x_2)/(x_1 + x_2)$
+
+    $x_1 parallel x_2 parallel x_3 = (x_1 x_2 x_3)/(x_1 x_2 + x_2 x_3 + x_1 x_3)$
+
+    #table(
+      columns: (1fr, 1fr),
+      fill: (x, y) => if calc.rem(x, 2) == 1 { tableFillLow } else { tableFillHigh },
+
+      [*Serie*],
+      [*Reihe/Parrallel*], 
+      
+      
+      align(
+        horizon+center,
+        scale(100%,
+          zap.circuit({
+            import zap : *
+
+            resistor("R1", (0,0.375), (1.5,0.375), fill: none, width: 1, height: 0.4)
+            resistor("R2", (1.5,0.375), (3,0.375), fill: none, width: 1, height: 0.4)
+          })
+        )
+      ),
+      align(
+        horizon+center,
+        scale(
+          100%,
+          zap.circuit({
+            import zap : *
+
+            resistor("R1", (0,0), (2,0), fill: none, width: 1, height: 0.4)
+            resistor("R2", (0,0.75), (2,0.75), fill: none, width: 1, height: 0.4)
+            wire("R1.in", "R2.in")
+            wire("R1.out", "R2.out")
+
+            node("N2", (0,0.375))
+            node("N3", (2,0.375))
+
+            wire("N2", (rel: (-0.3, 0)))
+            wire("N3", (rel: (0.3, 0)))
+          }),
+        )
+      ),
+
+
+
+      $R_"ges" = R_1+R_2$,
+      $R_"ges" = R_1 parallel R_2$,
+      $G_"ges" = G_1 parallel G_2$,
+      $G_"ges" = G_1 + G_2$,
+      $L_"ges" = L_1 + L_2$,
+      $L_"ges" = L_1 parallel L_2$,
+      $C_"ges" = C_1 parallel C_2$,
+      $C_"ges" = C_1 + C_2$,
+    )
   ]
 
   // Quell Wandlung
@@ -133,8 +189,6 @@
     )
   ]
 
-  #colbreak()
-
   // Quell Wandlung
   #bgBlock(fill: colorEineTore)[
     #subHeading(fill: colorEineTore)[Quelle Wandlung]
@@ -785,13 +839,14 @@
 
     *Levi's Lustig Leistung*
 
-    $underline(S) = underline(U) dot underline(I)^*$\
+    $(P =) space underline(S) = underline(U) dot underline(I)^*$\
 
     #table(
       columns: (auto, 1fr, auto),
-      [Scheinleitsung], [$abs(underline(S))$], [$["VA"]$],
-      [Wirkleistung], [$P = "Real"(underline(S)) $], [$["W"]$],
-      [Blindleistung], [$Q = "Imag"(underline(S))$], [$["var"]$]
+      fill: (x, y) => if calc.rem(y, 2) == 0 { tableFillLow } else { tableFillHigh },
+      [Scheinleitsung], [$(P_s =) space abs(underline(S))$], [$["VA"]$],
+      [Wirkleistung], [$(P_w =) space P = "Real"(underline(S)) $], [$["W"]$],
+      [Blindleistung], [$(P_b =) space Q = "Imag"(underline(S))$], [$["var"]$]
     )
   ]
 
@@ -829,6 +884,8 @@
       columns: (auto, auto, auto, auto),
       inset: 2mm,
       align: horizon,
+      fill: (x, y) => if calc.rem(y, 2) == 1 { rgb("#c5c5c5") } else { white },
+
       table.header([], [*Ein-Tor*], [*Zwei-Tor*], [*Reaktive Elemente*]),
       [*passiv*\ (nimmt Energie auf)\ $not$aktiv],
       [$forall (u,i) in cal(F): u dot i >= 0$],
diff --git a/src/lib/circuit.typ b/src/lib/circuit.typ
index f09b286..c5efbb3 100644
--- a/src/lib/circuit.typ
+++ b/src/lib/circuit.typ
@@ -13,7 +13,7 @@
 
     ctx.zap.style.insert("einTor", (
       scale: auto,
-      fill: auto,
+      fill: none,
       height: 3mm,
       width: 6mm,
     ))
diff --git a/src/lib/common_rewrite.typ b/src/lib/common_rewrite.typ
index 8272635..e19e38f 100644
--- a/src/lib/common_rewrite.typ
+++ b/src/lib/common_rewrite.typ
@@ -27,6 +27,9 @@
   align(left, block(e))
 }
 
+#let tableFillHigh = white
+#let tableFillLow = color.lighten(gray, 30%)
+
 #let sinTable = [
   #let data = json("../sintable.json")
   #table(
@@ -34,10 +37,11 @@
     rows: data.keys().len(),
     stroke: none,
     table.hline(stroke: (thickness: 0.3mm)),
-    fill: (x, y) => if (calc.rem(y, 2) == 0) { color.lighten(gray, 50%) } else { white },
+    fill: (x, y) => if (calc.rem(y, 2) == 0) { tableFillLow } else { tableFillHigh },
 
-    ..for (label) in data.keys() {
-      ([*#eval(label, mode: "math")*], )
+    table.vline(),
+    ..for (i, label) in data.keys().enumerate() {
+      ([*#eval(label, mode: "math")*], if i > 0 { table.vline() } else { table.vline(stroke: none) })
     },
 
     table.hline(stroke: (thickness: 0.3mm)),
@@ -46,6 +50,7 @@
     for (col) in data.keys() {
         (eval(data.at(col).at(i), mode: "math"),)
       }
-    }
+    },
+    table.hline(stroke: (thickness: 0.3mm)),
   )
 ]
\ No newline at end of file
diff --git a/src/lib/fetModel.typ b/src/lib/fetModel.typ
new file mode 100644
index 0000000..6661e0d
--- /dev/null
+++ b/src/lib/fetModel.typ
@@ -0,0 +1,242 @@
+#import "@preview/zap:0.5.0"
+
+#set page(width: auto, height: auto)
+
+#let FetModelSubstrate = zap.circuit({
+  import zap: *
+  import cetz.draw: *
+
+  rect(
+    (0, 0),
+    (12, 4),
+    fill: rgb("#ffb1b1"),
+    name: "p",
+  )
+  rect((0, -0.05), (12, -0.05), stroke: 3pt, name: "substrate")
+  earth("g1", (11.5, 0))
+
+  content("substrate", [Bulk], anchor: "north", padding: 0.2)
+})
+
+#let FetModel1 = zap.circuit({
+  import zap: *
+  import cetz.draw: *
+
+  rect(
+    (0, 0),
+    (12, 4),
+    fill: rgb("#ffb1b1"),
+    name: "p",
+  )
+  rect((0, -0.05), (12, -0.05), stroke: 3pt, name: "substrate")
+  earth("g1", (11.5, 0))
+
+  rect((2.75, 3), (5.25, 4), fill: rgb("#61ff9f"), name: "kanal1", radius: (
+    south: 0.2,
+  ))
+  rect((6.75, 3), (9.25, 4), fill: rgb("#61ff9f"), name: "kanal2", radius: (
+    south: 0.2,
+  ))
+
+  content("kanal1", [n+], anchor: "center", padding: 0.2)
+  content("kanal2", [n+], anchor: "center", padding: 0.2)
+  content("substrate", [Bulk], anchor: "north", padding: 0.2)
+})
+
+#let FetModel2 = zap.circuit({
+  import zap: *
+  import cetz.draw: *
+
+  rect(
+    (0, 0),
+    (12, 4),
+    fill: rgb("#ffb1b1"),
+    name: "p",
+  )
+  rect((0, -0.05), (12, -0.05), stroke: 3pt, name: "substrate")
+  earth("g1", (11.5, 0))
+
+  rect((2.75, 3), (5.25, 4), fill: rgb("#61ff9f"), name: "kanal1", radius: (
+    south: 0.2,
+  ))
+  rect((6.75, 3), (9.25, 4), fill: rgb("#61ff9f"), name: "kanal2", radius: (
+    south: 0.2,
+  ))
+
+  content("kanal1", [n+], anchor: "center", padding: 0.2)
+  content("kanal2", [n+], anchor: "center", padding: 0.2)
+  content("substrate", [Bulk], anchor: "north", padding: 0.2)
+
+
+  rect((0, 4), (12, 4.5), fill: rgb("#fffc61"), name: "isolator")
+  content("isolator.west", [Isolator ($"SiO"_2$)], anchor: "west", padding: .2)
+})
+
+#let FetModel3 = zap.circuit({
+  import zap: *
+  import cetz.draw: *
+
+  rect(
+    (0, 0),
+    (12, 4),
+    fill: rgb("#ffb1b1"),
+    name: "p",
+  )
+  rect((0, -0.05), (12, -0.05), stroke: 3pt, name: "substrate")
+  earth("g1", (11.5, 0))
+
+  rect((2.75, 3), (5.25, 4), fill: rgb("#61ff9f"), name: "kanal1", radius: (
+    south: 0.2,
+  ))
+  rect((6.75, 3), (9.25, 4), fill: rgb("#61ff9f"), name: "kanal2", radius: (
+    south: 0.2,
+  ))
+
+  content("kanal1", [n+], anchor: "center", padding: 0.2)
+  content("kanal2", [n+], anchor: "center", padding: 0.2)
+  content("substrate", [Bulk], anchor: "north", padding: 0.2)
+
+
+  rect((0, 4), (3, 4.5), fill: rgb("#fffc61"), name: "isolator2")
+  rect((5, 4), (7, 4.5), fill: rgb("#fffc61"))
+  rect((9, 4), (12, 4.5), fill: rgb("#fffc61"), name: "isolator")
+
+  rect((3, 4), (5, 4.25), fill: gray)
+  rect((7, 4), (9, 4.25), fill: gray)
+  rect((5.1, 4.5), (6.9, 4.75), fill: gray)
+
+  content("isolator", [$"SiO"_2$])
+  content("isolator2", [Isolator])
+})
+
+#let FetModel(type: "N", s: 100%) = zap.circuit({
+  import zap: *
+  import cetz.draw: rect, content
+
+  cetz.draw.scale(s)
+
+  let pTypeFill = rgb("#ffb1b1");
+  let pTypeFill = rgb("#ffb1b1");
+  let nTypeFill = rgb("#61ff9f")
+
+  rect(
+    (0, 0),
+    (12, 4),
+    fill: if(type == "N") { pTypeFill } else { nTypeFill },
+    name: "p",
+  )
+  rect((0, -0.05), (12, -0.05), stroke: 3pt, name: "substrate")
+  earth("g1", (11.5, 0))
+
+  wire((13, 5.5), (13, 0), mark: (end: ">"))
+  node("n-r1", (13, 5.75))
+
+  wire((6, 4.5), (6, 5.75))
+  node("n-g1", (6, 5.75))
+  wire("n-g1", "n-r1")
+
+  node("n-s1", (4, 5))
+  wire("n-s1", (4, 4.25))
+
+  node("n-d1", (8, 5))
+  wire("n-d1", (8, 4.25))
+
+  rect((0, 4), (3, 4.5), fill: rgb("#fffc61"), name: "isolator2")
+  rect((5, 4), (7, 4.5), fill: rgb("#fffc61"))
+  rect((9, 4), (12, 4.5), fill: rgb("#fffc61"), name: "isolator")
+
+  rect((3, 4), (5, 4.25), fill: gray)
+  rect((7, 4), (9, 4.25), fill: gray)
+  rect((5.1, 4.5), (6.9, 4.75), fill: gray)
+
+  content("n-g1", [*G*\ate], anchor: "south", padding: 0.2, auto-scale: true)
+  content("n-s1", [*S*\ource], anchor: "south", padding: 0.2)
+  content("n-d1", [*D*\rain], anchor: "south", padding: 0.2, auto-scale: true)
+  content("substrate", [Bulk], anchor: "north", padding: 0.2, auto-scale: true)
+  content("p", if type == "N" [p] else [n], auto-scale: true)
+  content("isolator", [$"SiO"_2$], auto-scale: true)
+
+  content("isolator2", [Isolator], auto-scale: true)
+
+  rect((2.75, 3), (5.25, 4), fill: if(type == "N") { nTypeFill }  else { pTypeFill }, name: "kanal1", radius: (
+    south: 0.2,
+  ))
+  rect((6.75, 3), (9.25, 4), fill: if(type == "N") { nTypeFill } else { pTypeFill }, name: "kanal2", radius: (
+    south: 0.2,
+  ))
+
+  content("kanal1", if type == "N" [n+] else [p+], anchor: "center", padding: 0.2, auto-scale: true)
+  content("kanal2", if type == "N" [n+] else [p+], anchor: "center", padding: 0.2, auto-scale: true)
+})
+
+#let FetModelConducting = zap.circuit({
+  import zap: *
+  import cetz.draw: *
+
+  rect(
+    (0, 0),
+    (12, 4),
+    fill: rgb("#ffb1b1"),
+    name: "p",
+  )
+  rect((0, -0.05), (12, -0.05), stroke: 3pt, name: "substrate")
+  earth("g1", (11.5, 0))
+
+  wire((13, 5.5), (13, 0), mark: (end: ">"))
+  node("n-r1", (13, 5.75))
+
+  wire((6, 4.5), (6, 5.75))
+  node("n-g1", (6, 5.75))
+  wire("n-g1", "n-r1")
+
+  node("n-s1", (4, 5))
+  wire("n-s1", (4, 4.25))
+
+  node("n-d1", (8, 5))
+  wire("n-d1", (8, 4.25))
+
+  rect((0, 4), (3, 4.5), fill: rgb("#fffc61"), name: "isolator2")
+  rect((5, 4), (7, 4.5), fill: rgb("#fffc61"))
+  rect((9, 4), (12, 4.5), fill: rgb("#fffc61"), name: "isolator")
+
+  rect((3, 4), (5, 4.25), fill: gray)
+  rect((7, 4), (9, 4.25), fill: gray)
+  rect((5.1, 4.5), (6.9, 4.75), fill: gray)
+
+  content("n-g1", [*G*\ate], anchor: "south", padding: 0.2)
+  content("n-s1", [*S*\ource], anchor: "south", padding: 0.2)
+  content("n-d1", [*D*\rain], anchor: "south", padding: 0.2)
+  content("substrate", [Bulk], anchor: "north", padding: 0.2)
+  content("p", [p])
+  content("isolator", [$"SiO"_2$])
+  content("isolator2", [Isolator])
+
+  rect((2.75, 3), (5.25, 4), fill: rgb("#61ff9f"), name: "kanal1", radius: (
+    south: 0.2,
+  ))
+  rect((6.75, 3), (9.25, 4), fill: rgb("#61ff9f"), name: "kanal2", radius: (
+    south: 0.2,
+  ))
+  rect((5.20, 3.99), (6.8, 3.9), fill: rgb("#61ff9f"), stroke: none)
+
+  content("kanal1", [n+], anchor: "center", padding: 0.2)
+  content("kanal2", [n+], anchor: "center", padding: 0.2)
+
+  rect((0.5, -1), (1, -0.70), fill: gray, stroke: none, name: "metal")
+  content("metal", [metal], anchor: "west", padding: 0.3)
+
+  rect((0.5, -1.2), (1, -1.5), fill: rgb("#61ff9f"), stroke: none, name: "n")
+  content("n", [n+], anchor: "west", padding: 0.3)
+
+  rect(
+    (2.5, -1),
+    (3, -0.7),
+    fill: rgb("#ffb1b1"),
+    stroke: none,
+    name: "p-substrate",
+  )
+  content("p-substrate", [p], anchor: "west", padding: 0.3)
+
+  rect((2.5, -1.2), (3, -1.5), fill: rgb("#fffc61"), stroke: none, name: "siO2")
+  content("siO2", [oxide], anchor: "west", padding: 0.3)
+})