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Signals and Systems by Smarajit Ghosh

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12.1 CLASSIFICATION OF FILTERS

Depending upon the type of signals filters are classified into two following categories:

  1. Analog Filters
  2. Digital Filters

12.1.1 Analog Filter

The inputs and outputs both are continuous time signals in analog filters. The block diagram of analog filter is shown in Fig. 12.1.

 

Block Diagram Analog Filter

 

Fig. 12.1 Block Diagram Analog Filter

12.1.2 Digital Filter

The inputs and outputs both are discrete time signals in analog filters. The block diagram of digital filter is shown in Fig. 12.2.

 

Block Diagram Digital Filter

 

Fig. 12.2 Block Diagram Digital Filter

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