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Title: Digital filter design- Design of IIR filter
Description: This describes the design procedures for the IIR filter. This topic come under the subject Digital Signal Processing

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Rejects unwanted frequencies from i/p signal
 Pass band- range of freq
...
that are blocked
 Types:1
...
High pass filter
3
...
Band reject filter


Indirect method
1
...
Derive the analog transfer function for the
analog prototype
...
Transform the transfer function of the
analog prototype in to an equivalent digital
filter transfer function
...
The jΩ axis in the s-plane should map in to the unit
circle in the Z- plane
2
...

2
...


Approximation of derivatives
The impulse invariant technique
The bilinear transformation



IIR filter is such that, the unit impulse response h(n) of
digital filter is the sampled version of the impulse
response of analog filter
...


2
...


1
...

components
All points in the LHP of s plane are mapped inside the
unit circle in the Z-plane
All points in the RHP of s plane are mapped outside the
unit circle in the Z-plane


Title: Digital filter design- Design of IIR filter
Description: This describes the design procedures for the IIR filter. This topic come under the subject Digital Signal Processing