circuits_lab_6

circuits_lab_6 - 385L - Laboratory 6 Logic Gates Abstract...

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385L - Laboratory 6 – Logic Gates Abstract This lab introduces logic gates and demonstrates the logic levels available from modern gates. It also included the construction of logic tables from multi-input gates. Background In electronics, a logic gate takes one or more input voltages or currents and, based on their values, returns a distinct output voltage or current using Boolean logic. There are many different kinds of logic gates, some of the most common being AND, OR, NOR, NOT and NAND gates. These gates employ binary, which is used to represent input and output values when there are only two possibilities, such as on/off, true/false, or high/low. Procedure 6-1 Logic Levels We used a 7400 NAND gate and set up a circuit as instructed. We first tried hooking both inputs up to the variable +/- 5 V source and varying between 0 and 5 V. Our data is shown below. Input Voltage 0.003 0.252 0.497 0.999 2.007 2.991 3.998 5.001 Output Voltage 1.28 0.75 0.0559 0.0559 0.0637 0.0524 0.0524 0.0564 One can see that the output seems to switch from high to low somewhere between .252 and .497 V
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circuits_lab_6 - 385L - Laboratory 6 Logic Gates Abstract...

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