Problem 41-2
Source: Problem 5-27 - page 181 -
ALEXANDER, Charles K., SADIKU, Matthew N. O. - Book:
Fundamentos de Circuitos Elétricos - 5ª Edição - Ed. McGraw Hill - 2013.
Determine the voltage Vo in the circuit shown in the Figura 41-02.1.
Solution of the Problem 41-2
It is known that a buffer has unit voltage voltage.
In order to determine the input voltage of the opamp, the resistive voltage divider must be solved together with the voltage source. Thus, the input voltage will be:
The voltage V1 is the opamp's own output voltage. So, for
to calculate Vo, a further resistive voltage divider is applied
in the exit. Thus:
