Add WDF allpass generator

Closes #156 (closed)

b_asic/operation.py

@@ -592,11 +592,7 @@ class AbstractOperation(Operation, AbstractGraphComponent):
                 f"{self.__class__.__name__} cannot be used as a destination"
                 f" because it has {diff} than 1 input"
             )
-        if isinstance(src, Signal):
-            src.set_destination(self.input(0))
-            return self
-        else:
-            return self.input(0).connect(src)
+        return self.input(0).connect(src)
 
     def __str__(self) -> str:
         """Get a string representation of this operation."""