Signum function sgn(f), for f>0, f=0 and f<0, has the values:
A. -1 to +1
B. +1, 0, -1 respectively
C. -∞ to + ∞
D. 0 always
Answer:B
Signum function sgn(f), for f>0, f=0 and f<0, has the values:
A. -1 to +1 B. +1, 0, -1 respectively C. -∞ to + ∞ D. 0 always
Explanation: The sgn(f) is a signum function that is defined in the frequency domain as