Question

Problem 1 The following transfer function characterizes the frequency response of an amplifier. Using the information of the transfer function determine: - the midband voltage gain in dE the exact value of the MB the exact value of the H3B CSCs+1E3)(s +2E3)(s +2.7 E9) s +4E3) (s+1.5E3)(s +1E9)(s+1.5E9)

Answer 1

The poles and zeroes arranged in ascending order are as,

1E3 Z, 1.5E3 P, 2E3 Z, 4E3 P, 1E9 P, 1.5E9 P, 2.7E9 Z

The asymptotic bodeplot of this looks like,

Rod%lee odlelolec Rode de, ес

From the graph it is clear that,

$\small \\f_{L\_3dB} = 4E3\\ f_{H\_3dB} = 1E9$

And mid band gain is between them,

In the mid-band region,

s>>>P,Z for P,Z to the left of mid-band

P,Z>>>s for P,Z to the right of mid-band

Then,

s +0)(s +0)(0+2.7E9) Amidband(s)55.5E8 -9.99