H and y parameters for CB and CE transistors

AI Thread Summary
The discussion focuses on calculating h parameters for common base (CB) and common emitter (CE) transistor circuits. The user is confused about obtaining h parameters, particularly when measurements yield zero or infinite values. It is suggested that zero measured currents may be due to imprecise amperemeter readings and that very small current values should be disregarded. Additionally, zero voltage values are also advised to be ignored for accurate calculations. Proper measurement techniques and ignoring negligible values are essential for correctly determining h parameters.
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Homework Statement



When I measure CB ciruit:
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I have got these results:
xxer7tg35jruq8wnrxn.png


And here CE:
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Homework Equations





The Attempt at a Solution


So.. here is table, how to calculate h parameters:
onac6pa5p06f8jfg8zv.png


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?
 
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Zero measured current just means your amperemeter was not precise enough. Ignore those (and maybe very small current values as well).
Zero voltage values: Similar issue, ignore them.
 
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