Electronic Labs_76

Electronic Labs_76 - 3-4 NAND/NOR Logic Gates SWITCH...

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Unformatted text preview: 3-4 NAND/NOR Logic Gates SWITCH ANALOGY SYMBOL EQUIVALENT LAMP LIGHTED=1 NAND OR NOR WITH INVERTER MN MO! > m£>hl'||||||||||||| TRUTH TABLE :1 3 n 1 1 o FUNCTION NOT INVERT A=A A=A OUTPUT = 1 IF INPUT = 0 AND VICE VERSA OUTPUT = 1 IF, AND ONLV IF ALL INPUTS I! ‘I OUTPUT = I IF ONE OR MORE INPUTS I 'I OUTPUT = 0 IF AND ONLY IF ALL INPUTS t lI OUTPUT = 0 IF ONE OR MORE INPUTS = I Table 3-8 I] (1) Connect the logic circuit shown in Fig. The table should indicate the operation of an OR 3-7a. Record the inputs and outputs in truth gate; that when A or Bis 1 the output Ywill be 1. table of Fig. 3-7b. Summary You have identified the logic NAND gate as the AND function followed by an INVERTER then verified the truth table by demonstrating the NAND' gate operation and observing that the out- put was E or NOT A and B. Similiarly, you identified the NOR gate as the OR gate followed by an INVERTER. You also found that the NAND and NOR gates will function as INVERTERS. You then demonstrated the results of an AND operation constructed using three NOR gates, two of which were used as IN VERTERS at the input. Finally, you constructed a circuit to perform an OR operation using NAND gates, two of which n Dun». .- awn-m 0000 0000 ...
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