CHAPTER 3
QUIZ ANSWERS:
1. b) EEG
2. The three signal parameters are: amplitude, frequency, and phase
3. c) 3sin(628 radians) = 3*(–0.313) = –0.939, or –0.94
PROBLEMS ANSWERS:
1. 1sin(6.28 * 1000 * 0.1 radians) + 3sin(6.28 * 6000 * 0.1 radians) + 1.5sin(6.28 *
10000 * 0.1 radians) + 2.5sin(6.28 * 12000 * 0.1 radians) – 4.
2. 2sin(6.28 * 2000 * 0.2 radians – 45 degrees) -4sin(6.28 * 2000 *0.2 radians – 78
degrees) + 5sin(6.28 * 2000 * 0.2 radians – 22 degrees)
3. Third: 6 kHz, a3 = ((2 * 10 * 0.1) * sin(3 * 3.14 * 0.1))/(3 * 3.14 * 0.1)
Eighth: 16 kHz, a8 = ((2 * 10 * 0.1) * sin(8 * 3.14 * 0.1))/(8 * 3.14 * 0.1)