December 2005
Intermediate to advanced
475 pages
12h 6m
English
Content preview from Signals and Systems
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12.3 SPECIFICATION OF THE FREQUENCY RESPONSE CHARACTERISTICS OF THE FILTERS
At first we decide the types of filters to be used i.e., analog or digital. Digital filters are also classified into four types like analog filters. These are as follows:
- Low pass filter
- High pass filter
- Band pass filter and
- Band stop filter
Figure 12.4 shows the frequency response of ideal filters.
Fig. 12.4 Frequency response of ideal filters
Low pass filters pass low frequencies from zero to cut off frequency (ωp) with approximately unit gain. High pass filters pass low frequencies from cut off frequency (ωp1 = ωp) to ωp2 = π with approximately unit gain. Band ...
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