input and output resistance of common collector

Sutitan

1. The problem statement, all variables and given/known data
I dont understand how the website below got the equations for the output and input resistances


2. Relevant equations
http://www.statemaster.com/encyclope...mmon-collector

The Electrician

Have a look at this:

http://people.seas.harvard.edu/%7Ejo.../bjt_amps.html

Does that help?

Sutitan

it does a little.

I figured out my problem. it had to do with the resistance reflection rule.

thanks for the reply though