Question

Design a combinational circuit that forms the 2-bit binary sum S1S0 of two 2-bit numbers X1X0...

Design a combinational circuit that forms the 2-bit binary sum S1S0 of two 2-bit numbers X1X0 and Y1Y0 and can produce a carry output C. Design the entire circuit with the help of three half adder circuit implementing each of the three outputs with XOR-AND and OR gates.

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Answer #1

above two bit adder design is using blocks of half adders ( H A ) and or gate

Below digital circuit is two bit adder using XOR - AND and OR gates

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