2.4 - Computational Logic

2.4 - Computational Logic

1. Binary

   • Has to be a 0 or a 1.
   • The use of binary components are easier to manufacture, cheaper and more reliable.
   • How it is used
     • Capacitators are within RAM.
     • Magnets are used in a hard disk.
     • DVD-RW reflects otic light rays.
     • Solid State Drives use s electron.

2. Logic Diagrams

   • • This is a diagram that shows all 3 logic gates in a Logic Diagram.
   • They are used to show all possible results of a Boolean algebra statement.
   • AND and OR must have 2 inputs.
   • NOT only has 1 input.

3. Logic gates

   • • Both inputs have to inputs have to be 1 to output 1. Else, output is one.
       • Represented with the sign ^.
     • If there is one 1/true input, output is 1.
       • Represented with the sign V.
     • If input is 1, output is 0 and vice versa.
       • Represented with the sign ¬ .

4. Truth Tables

   • To work out the number of rows, NUMBER OF ROWS = 2^NUMBER OF INPUTS.
   • Truth tables are used to show the steps more explicitly and to allow you to see what is happening in the logic diagram.

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