Question

Determine the value of N in the series equalizer.

(a) 1+ X1^2/Ro^2

(b) X1^2/Ro^2

(c) 1+ Ro^2/X1^2

(d) Ro^2/X1^2

I have been asked this question during a job interview.

My enquiry is from Series Equalizer in portion Filters and Attenuators of Network Theory

Answer 1

Right option is (a) 1+ X1^2/Ro^2

Easy explanation: The N is defined as the ratio of input power to the output power.

N=Pi/Pl = (Vmax^2/4Ro)/[Vmax^2/(4(Ro^2+X1^2))]Ro=1+X1^2/Ro^2.