ECTIONS 1-4 AND 1-5 -11.* Which of the following are analog quantities, and which are digital? (a) Number of atoms in a sample of material (b) Altitude of an aircraft (c) Pressure in a bicycle tire (d) Current through a speaker (e) Your age measured in years ers to problems marked with an asterisk can be found in the back of the text. level trigge PROBLEMS SECTION 1-1 the LED? 1-1. In Figure 1-22a, what is the logic level that must be output to turn 1-2. In Figure 1-22b, what is the logic level that must be output to turn on 1-3. In Figure 1-22a, which switch must be closed to turn on the LED? 1-4. In Figure 1-22b, which switch must be closed to turn on the LED? +V the LED? +V +V S1 S1 S2 S2 (b) (a) can be found in boldface type in the chapter and are defined in the Glossary at k. This applies to all chapters. 1-6. Assume the active part of the waveform is 1-8. Draw two cycles of the timing diagram for a signal that alternates between 0.3 V (binary 0) for 5 ms and 3.9 V (binary 1) for 2 ms. 1-9. Measure the period, frequency, and duty cycle of the waveform in 1-8. Assume the active part of the waveform is LOW. 1-10. Label each waveform in Figure 1-23: periodic/aperiodic. For thos T od utu cucle (assume activ (c) 10011011001.101102 1-14. Convert the following binary numbers to decimal. (a) 100112 (b) 1100.01012 (c) 10011100100.100102 1-15. Using three bits, show the binary counting sequence from 000 to 111. 1-16. Using six bits, show the binary counting sequence from 000000 to 111111. 1-17.* What is the maximum number that we can count up to using 10 bits? 1-18. What is the maximum number that we can count up to using 14 bits? 1-19.* How many bits are needed to count up to a maximum of 511? 1-20. How many bits are needed to count up to a maximum of 63? SECTION 1-7 1-21. Which of the following will increase/decrease the quality of the digi- tal signal? (a) Increasing the time between samples (b) Increasing the number of bits in each sample (c) Increasing the sampling frequency
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