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A case study is required for development of different digital versions of band-pass filter corresponding to its analogue prototype described by the following normalised transfer function:
You are to develop two different digital implementations of such filter and perform a comparative study as described in the following tasks:
1. Develop a digital implementation of the analogue prototype using impulse invariant method.
2. Develop a digital implementation of the analogue prototype using bi-linear transform.
3. Compare the two methods discussing their advantages and disadvantages. Make a preferential judgement and justify your choice.
For the tasks 1 and 2 outline the methods involved in digital design, obtain digital transfer functions, difference equations, and draw a schematic design diagrams in the Direct Form I and Direct Form II. Write down an expression for a digital filter frequency response for each task.
Give some applications of German silver. German silver is an alloy of zinc, nickel and copper. German silver is used in electrical measuring instruments.
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