Hello,
I am working on BJT realization in a new technology and wondering if it is possible when I measure Beta (I collector/ I base) from Gummel plot (I collector, I base Vs. V_BE) in common emitter configuration and measure Alpha in common Base configuration (I emitter / I collector), Can Beta be around 100 and Alpha close to 1, but when I try to measure the Output Characteristics (I collector Vs. V collector at different base currents or voltages) I never achieve collector current saturations and very little modulation due to the base? Is this high Beta and Alpha real in that case? Would that BJT be useful although it doesn't enter the active mode which is used for amplification applications?
Your help is appreciated,
Thanks,
Abdelrahman Askar, please send me the exact test sketch, and the technology that you are implementing the transistor. What is happening to the bod voltage of the transistor? Is this BJT vertical or horizontally fabricated.
cheers.
Mohammad H. Zarifi Thanks for your reply. I have sent you the info you requested.
Did you extract Ic-Vc curves versus constant base current or constant base voltage? I'm glad to look at your data to give a better answer if your problem is still unsolved.
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