- #1
Jalo
- 120
- 0
Homework Statement
Find the internal resistance seen at Vin.
Homework Equations
The Attempt at a Solution
To solve the problem I started by ignoring the condensators and substituting the MOSFET by it's model. This resulted in the following circuit:
By applying Thenevin's theorem it's possible to find the internal resistance. To do that I applied a test voltage source, VT, at the terminals and I proceeded to find an expression that relates VT with the current i that passes through it.
By doing so I got to the result R = 2622 Ω. This appears to be wrong tho, since the solutions state that the resistance is 2.2kΩ.
If someone could help me I'd appreciate.
Thanks.