Experiment_19 - Experiment 19. Characterization of Decoder...

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71 Experiment 19. Characterization of Decoder and Encoder 0. Preliminary Study A. Verify the results of Table 1 by using 74LS139. B. Investigate the output of 3-to-8 decoder by using 74LS138. C. Verify that 74LS148 has a function as a priority encoder. D. Design a hexadecimal-binary encoder by using 74LS148. 1. Objective of Experiment A. To learn the principles and implementation of the decoders and encoders. 2. Tasks A. To understand 2-to-4 decoder by using 74LS139. B. To understand 3-to-8 decoder by using 74LS138. 3. Equipment and Supplies A. 74LS139, 74LS138, 74LS148 B. Bread Board C. Oscilloscope D. Power Supply 4. Theory Refer to the following references A. Korean Lab Book (기계공학도를 위한 전기전자공학실험) B. Chapter 13, Giorgio Rizzoni, Principles and Applications of Electrical Engineering 5 th Ed 5. Experimental Procedure 5.1. 2-4 decoder experiment Construct a circuit shown in Figure 1. Measure and record the output signals for the combinations of inputs listed in Table 5. Compare these results with the truth table in Table 1.
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Experiment_19 - Experiment 19. Characterization of Decoder...

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