Output and 3n 2n 1n
RAW: _______ /63 pts
1. Explain the operation of an encoder. (1 point) ________A device that converts a weighted numeric input line to an equivalent digital code, such as hex or octal.____________________________
2. What does it mean when an encoder is a priority encoder? (1 point) _________The method used to handle multiple key closures. This means that logic establishes a rank order for the keys so that a key closure of lower priority will not change encoding of a higher priority key._______________________
3. Describe one practical application that uses encoder. (1 point) ________A television remote with four buttons.____________________________________________________________________________
____________________________________________________________________________________
4. Explain the operation of a decoder. (1 point) __________To find the direct meaning of cryptic or indirect language.__________________________________________________________________________
5. Describe one practical application that uses a decoder. (1 point) _______Windows Media Player decodes mp3’s so they can play on our computers______________________________________________
6. Search through datasheets for the 74148 device to find an application note that shows how to cascade two 74148 encoders to create one 16-to-4 line priority encoder. Draw the schematic for the 16-to-4 line priority encoder. (8 points)
7. Interpret a datasheet for the Quartus 74148 encoder and complete the following timing diagram. (5 points)
8. Interpret the datasheet for a 74138 decoder and complete the following timing diagram. (5 points)
9. Find a truth table for the 74148 encoder. You can use the one in your textbook or download a datasheet from a manufacturer. Use the datasheet to fill in the Output columns in the table below. Depending on the source of your datasheet, you may need to cross reference
1. Explain the operation of an encoder. (1 point) ________A device that converts a weighted numeric input line to an equivalent digital code, such as hex or octal.____________________________
2. What does it mean when an encoder is a priority encoder? (1 point) _________The method used to handle multiple key closures. This means that logic establishes a rank order for the keys so that a key closure of lower priority will not change encoding of a higher priority key._______________________
3. Describe one practical application that uses encoder. (1 point) ________A television remote with four buttons.____________________________________________________________________________
____________________________________________________________________________________
4. Explain the operation of a decoder. (1 point) __________To find the direct meaning of cryptic or indirect language.__________________________________________________________________________
5. Describe one practical application that uses a decoder. (1 point) _______Windows Media Player decodes mp3’s so they can play on our computers______________________________________________
6. Search through datasheets for the 74148 device to find an application note that shows how to cascade two 74148 encoders to create one 16-to-4 line priority encoder. Draw the schematic for the 16-to-4 line priority encoder. (8 points)
7. Interpret a datasheet for the Quartus 74148 encoder and complete the following timing diagram. (5 points)
8. Interpret the datasheet for a 74138 decoder and complete the following timing diagram. (5 points)
9. Find a truth table for the 74148 encoder. You can use the one in your textbook or download a datasheet from a manufacturer. Use the datasheet to fill in the Output columns in the table below. Depending on the source of your datasheet, you may need to cross reference