Lab 4 Hints

.docx

School

Baylor University *

*We aren’t endorsed by this school

Course

1308

Subject

Electrical Engineering

Date

Dec 6, 2023

Type

docx

Pages

4

Uploaded by MinisterAardvark3489

Report
The full adder: A | B | Cin | S | Cout 0 | 0 | 0 | 0 | 0 0 | 0 | 1 | 1 | 0 0 | 1 | 0 | 1 | 0 0 | 1 | 1 | 0 | 1 1 | 0 | 0 | 1 | 0 1 | 0 | 1 | 0 | 1 1 | 1 | 0 | 0 | 1 1 | 1 | 1 | 1 | 1 You can use a 3x8 decoder to implement this truth table as follows: Inputs A and B are connected to the two address lines of the decoder. The decoder will select one of the eight output lines based on the combination of A and B. The decoder's eight outputs (Y0 to Y7) will represent all possible combinations of A and B. The decoder's outputs can be directly connected to the inputs of two 2-input OR gates, where each OR gate receives four inputs (representing the combinations for Cin=0 and Cin=1). The outputs of the two OR gates will represent the Sum (S) and Carry-out (Cout) of the full adder. Here's how you can connect the decoder outputs to the OR gates: For Sum (S): OR gate 1: Input 1: Y1 (A=0, B=1) Input 2: Y2 (A=1, B=0) Input 3: Y4 (A=1, B=0) Input 4: Y7 (A=1, B=1) OR gate 2:
Input 1: Y0 (A=0, B=0) Input 2: Y3 (A=0, B=1) Input 3: Y5 (A=1, B=0) Input 4: Y6 (A=1, B=1) For Carry-out (Cout): OR gate 3: Input 1: Y3 (A=0, B=1) Input 2: Y4 (A=1, B=0) Input 3: Y6 (A=1, B=1) Input 4: Y7 (A=1, B=1) OR gate 4: Input 1: Y1 (A=0, B=1) Input 2: Y2 (A=1, B=0) Input 3: Y5 (A=1, B=0) Input 4: Y7 (A=1, B=1) This setup ensures that the outputs of the OR gates correspond to the Sum and Carry-out as per the full adder truth table. This implementation uses the decoder to simplify the logic required to compute the full adder's Sum and Carry-out based on the inputs A, B, and Cin. It's a straightforward way to create a full adder using the resources of a 3x8 decoder.
Your preview ends here
Eager to read complete document? Join bartleby learn and gain access to the full version
  • Access to all documents
  • Unlimited textbook solutions
  • 24/7 expert homework help