Digital Butterworth Filter Design
In this experiment we used Scilab software to simulate behaviour of digital butterworth filters.It provides an easy interface for coding and can also generate frequency response curves.A butterworth filter has a maximally flat magnitude frequeny response curve . Bilinear transformation method was used to design the filter. Filter parameters like passband attenuation,stopband attenuation,passband frequency and stopband frequency were given as input by the user.The order and transfer function of filter was displayed and magnitude response of filter was displayed on the screen.
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ReplyDeleteDue to its higher order hardware implementation is difficult.
ReplyDeleteBLT is a good method for filter designing.
ReplyDeleteCrisp content
ReplyDeleteMagnitude response of Butterworth filter is monotonic in nature.
ReplyDeleteIts only disadvantage is difficulty in implementation due to higher order.
ReplyDeleteButterworth filter has higher transition width compared to chebyshev filter
ReplyDeleteIn order to find the output of IIR filter difference equations are used.
ReplyDeleteit is also referred as a maximally flat magnitude filter. The rate of falloff response of the filter is determined by the number of poles taken in the circuit
ReplyDeleteIIR requires less memory and calculations than a similar FIR filter to achieve a given filtering characteristics.
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