Here we will try to understand Four Bit Parallel Adder cum Subtractor.
In or previous discussion we have already discussed a four-bit parallel adder.
Now in this video, we will understand the circuit diagram of adder cum subtractor in a single circuit.
In the circuit, we have an extra bit using which we can convert from adder to subtractor.
If the M bit is provided with 1 the circuit will subtract the bits.
If M is provided with 0 the circuit will add the bits.
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