1.

If A= ( frac{ _1 ( _u- _l)}{- _1^2+ _u _l} ) and B= ( frac{ _2 ( _u- _l)}{ _2^2- _u _l} ), then which of the following is the backward design equation for a low pass-to-band stop transformation?

A. <sub>S</sub>=Max{|A|,|B|}
B. <sub>S</sub>=Min{|A|,|B|}
C. <sub>S</sub>=|B|
D. <sub>S</sub>=|A|
Answer» C. <sub>S</sub>=|B|


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