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Determine the worst case propagation delay

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Reference no: EM131186856

• Draw the AND gates in the full adder?

Question 1(a)
Sketch a combinational circuit which takes as input, two 4-bit binary numbers, A3A2A1A0 and B3B2B1B0, and which outputs the 8-bit product P7P6P5P4P3P2P1P0•

Assume that you have available sixteen 2-input AND gates and three 4-bit adders.

Please explain the reasoning behind your design.

The circuit symbol for the 4-bit adder is shown in Figure 1. Note that C0 is the carry-in and C4 is the carry-out.

339_4 bit adder.png

Question 1(b)

Assuming that each 4-bit adder is implemented by cascading four full adders together (with no carry lookahead), determine the worst-case propagation delay for your combinational multiplier. You can assume that the delay through every full adder is tpd.

Reference no: EM131186856

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