diff --git a/src/cheatsheets/Schaltungstheorie.typ b/src/cheatsheets/Schaltungstheorie.typ
index 144e6c0..39b77a7 100644
--- a/src/cheatsheets/Schaltungstheorie.typ
+++ b/src/cheatsheets/Schaltungstheorie.typ
@@ -1226,7 +1226,7 @@
     [],
     [
       $Phi(t) = L dot i(t)$\
-      $u(t) = C dot (d i)/(d t)$\
+      $u(t) = L dot (d i)/(d t)$\
       $[L] = H = unit("V s") / unit("A")$
     ],
     [
@@ -1288,6 +1288,30 @@
     $
   ]
 
+  // AC Components
+  #bgBlock(fill: colorComplexAC)[
+    #subHeading(fill: colorComplexAC)[Komplexe Komponent]
+    #table(
+      columns: (1fr, 2fr, 2fr, 2fr),
+      fill: (x, y) => if calc.rem(y, 2) == 1 { tableFillLow } else { tableFillHigh },
+      [], [*$Y = U/I$*], [*$Z = I/U$*], [*$phi$*],
+      [], [*$Omega$*], [*$S$*], [*rad*],
+      zap.circuit({
+        import zap : *
+        resistor("R", (0, 0), (0.6, 0), width: 3mm, height: 2mm, fill: none)
+      }), $R$, $1/G = R$, $0$,
+
+      zap.circuit({
+        import zap : *
+        capacitor("R", (0, 0), (0.6, 0), width: 4mm, height: 6mm, fill: none)
+      }), $1/(j w C)$, $j w C$, $-pi/2$,
+      zap.circuit({
+        import zap : *
+        inductor("R", (0, 0), (0.6, 0), width: 4mm, height: 2mm, fill: none, variant: "ieee")
+      }), $j w L$, $1/(j w L)$, $pi/2$
+    )
+  ]
+
   #bgBlock(fill: colorComplexAC)[
     #subHeading(fill: colorComplexAC)[*Levi's Lustig Leistung*]
 
@@ -1296,9 +1320,9 @@
     #table(
       columns: (auto, 1fr, auto),
       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 = "Re"{} $], [$["W"]$],
-      [Blindleistung], [$(P_b =) space Q = "Im"{}$], [$["var"]$]
+      [Scheinleitsung], [$S = abs(P)$], [$["VA"]$],
+      [Wirkleistung], [$P_w = "Re"{P} $], [$["W"]$],
+      [Blindleistung], [$P_b = "Im"{P}$], [$["var"]$]
     )
 
     Bei Wiederstand: $R$
diff --git a/src/lib/common_rewrite.typ b/src/lib/common_rewrite.typ
index 51e10d3..1a68331 100644
--- a/src/lib/common_rewrite.typ
+++ b/src/lib/common_rewrite.typ
@@ -67,7 +67,7 @@
   $z^* = a - #i b = r e^(-#i phi)$
 
   $r = abs(z) quad phi = cases(
-    + arccos(a/r) space : space b >= 0,
-    - arccos(a/r) space : space b < 0,
+    + arccos(a/r) space : space a >= 0,
+    - arccos(a/r) space : space a < 0,
   )$
 ]
\ No newline at end of file