Discrete and Digital Signals and Systems - Digital Signal Processing: An Introduction with MATLAB and Applications - page 125

5

0

f , Hz

−5

−10

−15

f s = 44.1 kHz

−20

−25

= 0.999

α

−30

α = 0.98

−35

α = 0.95

−40

−100 0 100 200 300 400 500 600 700 800 900 1000

f s = 44.1 kHz, α = 0.99 , DC component = 4v , f i = 400 Hz

6

Input signal (DC − shifted)

4

2

Output signal (DC − free)

0

−2

0 0.01 0.02 0.03 0.04 0.05 0.06 0.07 0.08 0.09 0.1

Time, sec

f s = 44.1 kHz, α = 0.99 , DC component = 4v , f i = 20 Hz

6

Input signal (DC − shifted)

4

2

Output signal (DC − free, but attenuated)

0

−2

0 0.01 0.02 0.03 0.04 0.05 0.06 0.07 0.08 0.09 0.1

Time, sec

Fig. 2.42 Frequency and time-domain performance of the DC Blocker