Question

For a 2-port network, the value of the h parameter is as h=[600, 0.04; 30, 2×10^-3]. Given that, ZS = 2 kΩ and ZL = 400 Ω. The value of the parameter Zout is ______________

(a) 650 Ω

(b) 500 Ω

(c) 250 Ω

(d) 600 Ω

The question was posed to me in an internship interview.

My doubt stems from Advanced Problems Involving Parameters topic in portion Two-Port Networks of Network Theory

Answer 1

The correct option is (a) 650 Ω

The best explanation: Zout = \(\frac{R_s+h_{ie}}{(R_s+h_{ie}) h_{oe}-h_{re} h_{fe}}\)

= \(\frac{R_s+h_{11}}{(R_s+h_{11}) h_{22}-h_{21} h_{12}}\)

= \(\frac{2000+600}{2600×2×10^{-3}-30×0.04}\) = 650 Ω.