1.

Consider the following transfer functions:1. \(\frac{1}{{j\omega + 1}}\)2. \(\frac{1}{{{{\left( {j\omega + 1} \right)}^2}}}\) 3. \(\frac{1}{{\left( {j\omega + 1} \right)\left( {j\omega + 2} \right)}}\) The transfer functions which have a linear phase are:

A. 1 and 2 only
B. 1 and 3 only
C. 2 and 3 only
D. 1, 2 and 3
Answer» E.


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