UploadFile_6417

Problems 461
1
0.8913
Magnitude Response
1
Phase Response
phase in π units
0.5
0
−0.5
0
0 0.25 0.4 0.7 0.8 1
Digital frequency in π units
−1
0 0.25 0.4 0.7 0.8 1
Digital frequency in π units
0
Magnitude in dB
15
Group Delay
10
5
−40
0 0.25 0.4 0.7 0.8 1
Digital frequency in π units
0
0 0.25 0.4 0.7 0.8 1
Digital frequency in π units
FIGURE 8.34 Digital Chebyshev-II bandstop filter in Example 8.30
A = 1.0000 1.3041 0.8031
1.0000 0.8901 0.4614
1.0000 0.2132 0.2145
1.0000 -0.4713 0.3916
1.0000 -0.8936 0.7602
This is also a 10th-order filter. The frequency domain plots are shown in
Figure 8.34.
□
8.7 PROBLEMS
P8.1 A digital resonator is to be designed with ω 0 = π/4 that has 2 zeros at z =0.
1. Compute and plot the frequency response of this resonator for r =0.8, 0.9, and 0.99.
2. For each case in part 1, determine the 3 dB bandwidth and the resonant frequency ω r
from your magnitude plots.
3. Check if your results in part 2 are in agreement with the theoretical results.
Copyright 2010 Cengage Learning. All Rights Reserved. May not be copied, scanned, or duplicated, in whole or in part. Due to electronic rights, some third party content may be suppressed from the eBook and/or eChapter(s).
Editorial review has deemed that any suppressed content does not materially affect the overall learning experience. Cengage Learning reserves the right to remove additional content at any time if subsequent rights restrictions require it.