Problem 78-9
Source:
Problem 13-30 - page 537 -
SADIKU, Mathew & ALEXANDER, Charles - Book: Fundamentos de Circuitos Elétricos -
Ed. McGraw Hill - 5ª edição - 2013.
Determine the input impedance, Zin, of the circuit shown in
Figure 78-09.1 using the concept of reflected impedance.
Solution of the Problem 78-9
To solve this problem we must use eq. 78-12, reproduced below:
Based on the circuit shown in Figure 78-09.1 and eq. 78-12, we can identify
the following parameters:
In eq. 78-12 we have to, in the case of the circuit we are analyzing, R1
must be represented by an impedance that we will call
Z1 = 25 + j40 Ω . And in the denominator we identify
ZL = -j6 . Taking this into account, we have:
Efetuando o cálculo, encontramos:
