2.4 - Computational Logic

2.4 - Computational Logic

1. Truth tables

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

2. Logic Diagrams

   • AND and OR must have 2 inputs
   • Not only has 1 input
   • • This is a diagram which shows all 3 logic gates in a logic diagram
   • They are used to show all possible results of a Boolean Algebra statement

3. Logic Gates

   • • If input is 2 output is 0
     • If there is same input output is 0

4. Binary

   • Has to be 0 or 1
   • The use of binary components are easier to manufacture, cheaper and more expensive reliable
   • How it is used
     • Operations are within RAM
     • Magnets are used in a hard disk
     • DVD reflects into light rays
     • Solid state drives are used

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