S
sert
I've been trying to determine the parameters of the hybrid-pi
model for a given bjt transistor. Some books give the following
as the model:
http://i33.tinypic.com/2m2xvtt.png
Is it just me or are the rb and rpi resistances impossible to
calculate by manipulating the circuit only from the B, C, E
terminals? It seems to me that the system of the equations we
can write is under-determined. If we omit rb (as is mostly done)
though, it becomes very simple to solve.
Is rb determined via some other way?
model for a given bjt transistor. Some books give the following
as the model:
http://i33.tinypic.com/2m2xvtt.png
Is it just me or are the rb and rpi resistances impossible to
calculate by manipulating the circuit only from the B, C, E
terminals? It seems to me that the system of the equations we
can write is under-determined. If we omit rb (as is mostly done)
though, it becomes very simple to solve.
Is rb determined via some other way?
