- #1

Abdulwahab Hajar

- 56

- 2

## Homework Statement

for the opamp circuit give in the figure, find Vo(t) for t > 0

the figure is attached.

## Homework Equations

I know that tau = R * C

that is the time constant of a capacitor discharging is equal to the product of the resistor that it discharges through and its capacitance.

## The Attempt at a Solution

The solution is in the file attached, I understand the whole thing. However, when I calculate the time constant my intuition tells me that the capactior discharges through the 100KΩ, the 20KΩ and the 10KΩ resistors. But the solution tells us that the 10KΩ resistor isn't included in the calculation of the time constant.

My question is why?

Thanks for the help