Logicout3

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Logicout3

  1. 1. Dave’s Revision NotesHigher Technological Studies Gary Plimer 20005 Applied Electronics (Outcome 3)
  2. 2. Applied Electronics (outcome 3) Gary Plimer 20005 Basic Logic Gates NOT AND OR A Z A B Z A B Z 0 1 0 0 0 0 0 0 0 1 0 0 1 1 1 0 1 0 0 1 0 1 1 1 1 1 1 1
  3. 3. Applied Electronics (outcome 3) Gary Plimer 20005 Basic Logic Gates NAND NOR EOR A B Z A B Z A B Z 0 0 1 0 0 1 0 0 0 0 1 1 0 1 0 0 1 1 1 0 1 1 0 0 1 0 1 1 1 0 1 1 0 1 1 0
  4. 4. Combinational Logic It is often necessary to use more than one gate in a logiccircuit. In these cases, we need to analyse a CombinationalLogic circuit. A B C D Z 0 0 0 0 0 A REMOTE BUTTON D 0 0 1 0 0 0 1 0 1 0 B Z TV SET BUTTON CHANNEL SELECT 0 1 1 1 1 1 0 0 1 0 C TV ON/OFF SWITCH 1 0 1 1 1 1 1 0 1 0 1 1 1 1 1
  5. 5. Nand Equivalents 1Integrated Circuits, (IC’s) come in varying packages.The one shown below is a Quad, 2 Input, Nand IC. +Vcc 14 13 12 11 10 9 8 1 2 3 4 5 6 7 Gnd (0V)In industry, it is common to restrict the number of IC’sused. This reduces cost, stock levels and assemblyrequirements.
  6. 6. Nand Equivalents 2 NOT OR AND
  7. 7. Converting to Nands Original Circuit NOT = AND = Substituting NANDS

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