Logic design - Full subtractor question -

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SUMMARY

The discussion revolves around designing a full subtractor circuit for 4-digit binary numbers represented by A3:0, B3:0, C3:0, and D3:0. The user seeks assistance in complementing the schematic by entering node names S4:0, P4:0, C3:0, and D3:0. Key points include the need for clarity on the specific subtraction operation (e.g., A-B or B-C) and the importance of a diagram for accurate implementation.

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  • Understanding of digital logic design principles
  • Familiarity with full subtractor circuits and their functionality
  • Knowledge of binary number representation
  • Ability to read and interpret circuit schematics
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  • Research the design and operation of full subtractor circuits
  • Learn how to create and interpret logic circuit diagrams
  • Study binary arithmetic operations, specifically subtraction
  • Explore tools for simulating digital circuits, such as Logisim or Multisim
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Students in electrical engineering or computer science, educators teaching digital logic design, and hobbyists interested in circuit design and binary arithmetic.

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Logic design - Full subtractor question - need help !

Homework Statement


My professor gave my class this question but I really do not know how to solve.

The circuit will perform the subtraction where A<3:0>; B<3:0>; C<3:0>; D<3:0> represent 4-digit binary number.
a) Complement the schmetic by entering the node name S<4:0>; P<4:0>; C<3:0>; D<3:0>


Any help will be appreciated!
thanks all .


Homework Equations





The Attempt at a Solution



I know that I have to use the diagram but I do not know where to start from :-[
 
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minhkhoa2011 said:

Homework Statement


My professor gave my class this question but I really do not know how to solve.

The circuit will perform the subtraction where A<3:0>; B<3:0>; C<3:0>; D<3:0> represent 4-digit binary number.
a) Complement the schmetic by entering the node name S<4:0>; P<4:0>; C<3:0>; D<3:0>


Any help will be appreciated!
thanks all .


Homework Equations





The Attempt at a Solution



I know that I have to use the diagram but I do not know where to start from :-[

Use what diagram? Were you given a diagram? If so, please post it as an attachment, or give us a link to follow to see it.

Also, what are you subtracting from what? A-B? B-C? A full subtractor has two inputs (and maybe a borrow bit in), and one output (and maybe a borrow bit out)...
 

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