This 4-bit adder takes advantage of the full adder module by taking four full adders and linking them together to add 2 four bit inputs. In the 4-bit adder, the first carry bit is set to zero because there is no initial carry bit as an input.
Simulation results from the Verilog representation of this Four-Bit Ripple Adder
- Four-Bit Ripple Adder Module - four_bit_adder.v
- Four-Bit Ripple Adder Test Bench - four_bit_adder_test.v