a) If we were using a 4-bit adder.
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September 21, 2020Unit 4 Assignment
September 21, 2020a) If we were using a 4-bit adder.
- ) If we were using a 4-bit adder. What constant would be added to the
BCD code inputs to provide an output of EX-3. (ignoring the carry out bit)
BCD – in
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C-out C-in
0
EX-3 code out
(Remember the EX-3 code was BCD with a little Extra)
- b) Using the constant you provided for part (a) demonstrate that the solution did
convert BCD to Excess-3. (ignoring the carry out)
BCD + constant = Excess-3
(BCD 0 = the EX-3 representation of 0) 00002 + = 0Carry out 0011
- Using a representation of a 4-bit adder chip given below, one of the variable input’s will be excess-3 code with the output of the ADDER being in BCD. Calculate the constant that would be used to ADD together with the excess-3 code that will provide the conversion of the excess-3 code back to BCD using the 4-bit adder chip representation shown below.
Excess-3 code here
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C out C in = 0
BCD output here
- Given the following Multiplexer chips: Set up as a 16×1 configuration,
- Label inputs and outputs and label control inputs
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- Label the truth table showing how it is used for control. s s s s
0 0 0 0
0 0 0 1
0 0 1 0
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0 0 1 1
0 1 0 0
0 1 0 1
0 1 1 0
0 1 1 1
1 0 0 0
1 0 0 1
1 0 1 0
1 0 1 1 1 1 0 0
1 1 0 1
1 1 1 0
1 1 1 1
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