1. The problem statement, all variables and given/known data When I measure CB ciruit: I have got these results: And here CE: 2. Relevant equations 3. The attempt at a solution So.. here is table, how to calculate h parameters: But I don't understand, am I using it correctly. When I use results of my table where results are 0, then always h parameters is 0 or infinity. Both circuit is without resistance.. so Hie should be 0? How to calculate there parameters correctly?