diff --git a/docs/simulators.rst b/docs/simulators.rst
index 44360f7..487ac1f 100644
--- a/docs/simulators.rst
+++ b/docs/simulators.rst
@@ -14,6 +14,15 @@ Logic Simulation - :mod:`kyupy.logic_sim`
 .. autoclass:: kyupy.logic_sim.LogicSim
    :members:
 
+.. autoclass:: kyupy.logic_sim.LogicSim2V
+   :members:
+
+.. autoclass:: kyupy.logic_sim.LogicSim4V
+   :members:
+
+.. autoclass:: kyupy.logic_sim.LogicSim6V
+   :members:
+
 
 Timing Simulation - :mod:`kyupy.wave_sim`
 -----------------------------------------