Transistor Data sheet current gain (Hfe)

Thread Starter


Joined Jul 3, 2010
Thanks for all the advice. Tried to simulate the circuit with Labcenter Proteus (Prospice engine) and was able to vary the resistor values and see if the transistor is saturated, a model already existed for the transistor in the library.
Will probably try and learn how to use spice to test circuits.
The circuit is a one off to test a concept.


Joined Dec 20, 2007
The SIM model of a transistor is only for a "typical" one. A real transistor might have much less or much more current gain.
You should design circuits so that most or all of them work properly by using minimum spec's.