diff --git a/ariths_gen/multi_bit_circuits/adders/carry_lookahead_adder.py b/ariths_gen/multi_bit_circuits/adders/carry_lookahead_adder.py
index a1ba873..20356a1 100644
--- a/ariths_gen/multi_bit_circuits/adders/carry_lookahead_adder.py
+++ b/ariths_gen/multi_bit_circuits/adders/carry_lookahead_adder.py
@@ -66,10 +66,13 @@ class UnsignedCarryLookaheadAdder(ArithmeticCircuit):
         name (str, optional): Name of unsigned cla. Defaults to "u_cla".
     """
     def __init__(self, a: Bus, b: Bus, cla_block_size: int = 4, prefix: str = "", name: str = "u_cla", **kwargs):
-        assert a.N == b.N
         self.N = max(a.N, b.N)
         super().__init__(a=a, b=b, prefix=prefix, name=name, out_N=self.N+1, **kwargs)
 
+        # Bus sign extension in case buses have different lengths
+        self.a.bus_extend(N=self.N, prefix=a.prefix)
+        self.b.bus_extend(N=self.N, prefix=b.prefix)
+
         # To signify current number of blocks and number of bits that remain to be added into function blocks
         N_blocks = 0
         N_wires = self.N
diff --git a/ariths_gen/multi_bit_circuits/adders/carry_skip_adder.py b/ariths_gen/multi_bit_circuits/adders/carry_skip_adder.py
index 10eb66a..7ec7a86 100644
--- a/ariths_gen/multi_bit_circuits/adders/carry_skip_adder.py
+++ b/ariths_gen/multi_bit_circuits/adders/carry_skip_adder.py
@@ -73,10 +73,13 @@ class UnsignedCarrySkipAdder(ArithmeticCircuit):
         name (str, optional): Name of unsigned cska. Defaults to "u_cska".
     """
     def __init__(self, a: Bus, b: Bus, bypass_block_size: int = 4, prefix: str = "", name: str = "u_cska", **kwargs):
-        assert a.N == b.N
         self.N = max(a.N, b.N)
         super().__init__(a=a, b=b, prefix=prefix, name=name, out_N=self.N+1, **kwargs)
 
+        # Bus sign extension in case buses have different lengths
+        self.a.bus_extend(N=self.N, prefix=a.prefix)
+        self.b.bus_extend(N=self.N, prefix=b.prefix)
+
         # To signify current number of blocks and number of bits that remain to be added into function blocks
         N_blocks = 0
         N_wires = self.N
diff --git a/ariths_gen/multi_bit_circuits/adders/pg_ripple_carry_adder.py b/ariths_gen/multi_bit_circuits/adders/pg_ripple_carry_adder.py
index 55fadb0..a19f6b8 100644
--- a/ariths_gen/multi_bit_circuits/adders/pg_ripple_carry_adder.py
+++ b/ariths_gen/multi_bit_circuits/adders/pg_ripple_carry_adder.py
@@ -63,10 +63,13 @@ class UnsignedPGRippleCarryAdder(ArithmeticCircuit):
         name (str, optional): Name of unsigned P/G rca. Defaults to "u_pg_rca".
     """
     def __init__(self, a: Bus, b: Bus, prefix: str = "", name: str = "u_pg_rca", **kwargs):
-        assert a.N == b.N
         self.N = max(a.N, b.N)
         super().__init__(a=a, b=b, prefix=prefix, name=name, out_N=self.N+1, **kwargs)
 
+        # Bus sign extension in case buses have different lengths
+        self.a.bus_extend(N=self.N, prefix=a.prefix)
+        self.b.bus_extend(N=self.N, prefix=b.prefix)
+
         # Gradual addition of 1-bit adder components
         for input_index in range(self.N):
             if input_index == 0:
diff --git a/ariths_gen/multi_bit_circuits/adders/ripple_carry_adder.py b/ariths_gen/multi_bit_circuits/adders/ripple_carry_adder.py
index b5da36c..229e614 100644
--- a/ariths_gen/multi_bit_circuits/adders/ripple_carry_adder.py
+++ b/ariths_gen/multi_bit_circuits/adders/ripple_carry_adder.py
@@ -54,10 +54,13 @@ class UnsignedRippleCarryAdder(ArithmeticCircuit):
         name (str, optional): Name of unsigned rca. Defaults to "u_rca".
     """
     def __init__(self, a: Bus, b: Bus, prefix: str = "", name: str = "u_rca", **kwargs):
-        assert a.N == b.N
         self.N = max(a.N, b.N)
         super().__init__(a=a, b=b, prefix=prefix, name=name, out_N=self.N+1, **kwargs)
 
+        # Bus sign extension in case buses have different lengths
+        self.a.bus_extend(N=self.N, prefix=a.prefix)
+        self.b.bus_extend(N=self.N, prefix=b.prefix)
+
         # Gradual addition of 1-bit adder components
         for input_index in range(self.N):
             # First adder is a half adder
diff --git a/ariths_gen/multi_bit_circuits/dividers/array_divider.py b/ariths_gen/multi_bit_circuits/dividers/array_divider.py
index 0ef7010..4c31ac1 100644
--- a/ariths_gen/multi_bit_circuits/dividers/array_divider.py
+++ b/ariths_gen/multi_bit_circuits/dividers/array_divider.py
@@ -96,10 +96,13 @@ class ArrayDivider(ArithmeticCircuit):
         name (str, optional): Name of array divider. Defaults to "arrdiv".
     """
     def __init__(self, a: Bus, b: Bus, prefix: str = "", name: str = "arrdiv", **kwargs):
-        assert a.N == b.N
         self.N = max(a.N, b.N)
         super().__init__(a=a, b=b, prefix=prefix, name=name, out_N=self.N, **kwargs)
 
+        # Bus sign extension in case buses have different lengths
+        self.a.bus_extend(N=self.N, prefix=a.prefix)
+        self.b.bus_extend(N=self.N, prefix=b.prefix)
+
         # Performing series of iterative subtractions
         # Gradually shifting the divisor
         for a_index in reversed(range(self.N)):
diff --git a/ariths_gen/multi_bit_circuits/multipliers/array_multiplier.py b/ariths_gen/multi_bit_circuits/multipliers/array_multiplier.py
index d014364..4817d92 100644
--- a/ariths_gen/multi_bit_circuits/multipliers/array_multiplier.py
+++ b/ariths_gen/multi_bit_circuits/multipliers/array_multiplier.py
@@ -83,10 +83,13 @@ class UnsignedArrayMultiplier(MultiplierCircuit):
         name (str, optional): Name of unsigned array multiplier. Defaults to "u_arrmul".
     """
     def __init__(self, a: Bus, b: Bus, prefix: str = "", name: str = "u_arrmul", **kwargs):
-        assert a.N == b.N
         self.N = max(a.N, b.N)
         super().__init__(a=a, b=b, prefix=prefix, name=name, out_N=self.N*2, **kwargs)
 
+        # Bus sign extension in case buses have different lengths
+        self.a.bus_extend(N=self.N, prefix=a.prefix)
+        self.b.bus_extend(N=self.N, prefix=b.prefix)
+
         # Gradual generation of partial products
         for b_multiplier_index in range(self.N):
             for a_multiplicand_index in range(self.N):
@@ -187,10 +190,13 @@ class SignedArrayMultiplier(MultiplierCircuit):
         name (str, optional): Name of signed array multiplier. Defaults to "s_arrmul".
     """
     def __init__(self, a: Bus, b: Bus, prefix: str = "", name: str = "s_arrmul", **kwargs):
-        assert a.N == b.N
         self.N = max(a.N, b.N)
         super().__init__(a=a, b=b, prefix=prefix, name=name, out_N=self.N*2, signed=True, **kwargs)
         self.c_data_type = "int64_t"
+        
+        # Bus sign extension in case buses have different lengths
+        self.a.bus_extend(N=self.N, prefix=a.prefix)
+        self.b.bus_extend(N=self.N, prefix=b.prefix)
 
         # Gradual generation of partial products
         for b_multiplier_index in range(self.N):
diff --git a/ariths_gen/multi_bit_circuits/multipliers/dadda_multiplier.py b/ariths_gen/multi_bit_circuits/multipliers/dadda_multiplier.py
index 50b5d32..9c47be4 100644
--- a/ariths_gen/multi_bit_circuits/multipliers/dadda_multiplier.py
+++ b/ariths_gen/multi_bit_circuits/multipliers/dadda_multiplier.py
@@ -50,10 +50,13 @@ class UnsignedDaddaMultiplier(MultiplierCircuit):
         unsigned_adder_class_name (str, optional): Unsigned multi bit adder used to obtain final sums of products. Defaults to UnsignedCarryLookaheadAdder.
     """
     def __init__(self, a: Bus, b: Bus, prefix: str = "", name: str = "u_dadda_cla", unsigned_adder_class_name: str = UnsignedCarryLookaheadAdder, **kwargs):
-        assert a.N == b.N
         self.N = max(a.N, b.N)
         super().__init__(a=a, b=b, prefix=prefix, name=name, out_N=self.N*2, **kwargs)
 
+        # Bus sign extension in case buses have different lengths
+        self.a.bus_extend(N=self.N, prefix=a.prefix)
+        self.b.bus_extend(N=self.N, prefix=b.prefix)
+
         # Get starting stage and maximum possible column height
         self.stage, self.d = self.get_maximum_height(initial_value=min(self.a.N, self.b.N))
         # Initialize all columns partial products forming AND gates matrix
@@ -151,11 +154,14 @@ class SignedDaddaMultiplier(MultiplierCircuit):
         unsigned_adder_class_name (str, optional): Unsigned multi bit adder used to obtain final sums of products. Defaults to UnsignedCarryLookaheadAdder.
     """
     def __init__(self, a: Bus, b: Bus, prefix: str = "", name: str = "s_dadda_cla", unsigned_adder_class_name: str = UnsignedCarryLookaheadAdder, **kwargs):
-        assert a.N == b.N
         self.N = max(a.N, b.N)
         super().__init__(a=a, b=b, prefix=prefix, name=name, out_N=self.N*2, signed=True, **kwargs)
         self.c_data_type = "int64_t"
 
+        # Bus sign extension in case buses have different lengths
+        self.a.bus_extend(N=self.N, prefix=a.prefix)
+        self.b.bus_extend(N=self.N, prefix=b.prefix)
+
         # Get starting stage and maximum possible column height
         self.stage, self.d = self.get_maximum_height(initial_value=min(self.a.N, self.b.N))
         # Initialize all columns partial products forming AND/NAND gates matrix based on Baugh-Wooley multiplication
diff --git a/ariths_gen/multi_bit_circuits/multipliers/wallace_multiplier.py b/ariths_gen/multi_bit_circuits/multipliers/wallace_multiplier.py
index 378a400..4098cdf 100644
--- a/ariths_gen/multi_bit_circuits/multipliers/wallace_multiplier.py
+++ b/ariths_gen/multi_bit_circuits/multipliers/wallace_multiplier.py
@@ -49,10 +49,13 @@ class UnsignedWallaceMultiplier(MultiplierCircuit):
         unsigned_adder_class_name (str, optional): Unsigned multi bit adder used to obtain final sums of products. Defaults to UnsignedCarryLookaheadAdder.
     """
     def __init__(self, a: Bus, b: Bus, prefix: str = "", name: str = "u_wallace_cla", unsigned_adder_class_name: str = UnsignedCarryLookaheadAdder, **kwargs):
-        assert a.N == b.N
         self.N = max(a.N, b.N)
         super().__init__(a=a, b=b, prefix=prefix, name=name, out_N=self.N*2, **kwargs)
 
+        # Bus sign extension in case buses have different lengths
+        self.a.bus_extend(N=self.N, prefix=a.prefix)
+        self.b.bus_extend(N=self.N, prefix=b.prefix)
+
         # Initialize all columns partial products forming AND gates matrix
         self.columns = self.init_column_heights()
 
@@ -144,11 +147,14 @@ class SignedWallaceMultiplier(MultiplierCircuit):
         unsigned_adder_class_name (str, optional): Unsigned multi bit adder used to obtain final sums of products. Defaults to UnsignedCarryLookaheadAdder.
     """
     def __init__(self, a: Bus, b: Bus, prefix: str = "", name: str = "s_wallace_cla", unsigned_adder_class_name: str = UnsignedCarryLookaheadAdder, **kwargs):
-        assert a.N == b.N
         self.N = max(a.N, b.N)
         super().__init__(a=a, b=b, prefix=prefix, name=name, out_N=self.N*2, signed=True, **kwargs)
         self.c_data_type = "int64_t"
 
+        # Bus sign extension in case buses have different lengths
+        self.a.bus_extend(N=self.N, prefix=a.prefix)
+        self.b.bus_extend(N=self.N, prefix=b.prefix)
+
         # Initialize all columns partial products forming AND/NAND gates matrix based on Baugh-Wooley multiplication
         self.columns = self.init_column_heights(signed=True)