7. (15 pts) Consider a very unusual adder. It takes two 8-bit inputs, both repre

Question

7. (15 pts) Consider a very unusual adder. It takes two 8-bit inputs, both representing number using the "one hot'" representation scheme (Thus the inputs range in value from 0-7). The output is a 4-bit unsigned number that is a sum of the two inputs. In your design you may use the following devices: (Be sure to label all of the devices you use other than standard gates!) a. 2-input AND gates, 2-input OR gates, 2-input XOR gates, NOT gates b. 3-bit adders (inputs and outputs are both 3-bits) with carry-in and carry-out. c. 8 to 3 encoders (all wires active high) d. 3 to 8 decoders (all wires active high) e. 8 to 4 Multiplexers (all wires active high) 8 A 4 Unusual "one hot" adder

Explanation / Answer

1.As we need to accept one hot code we shall choose two 8:3 encoders at input section.

2.The output of the encoder will be within the range 0-7

3.Take a 3 bit adder give the out put of the encoder as input to the 3 bit adder, it has 3 outputs as sum and one output as carry, make the carry out as sum output, therfore we get total 4 outputs.

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