H and y parameters for CB and CE transistors

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SUMMARY

The discussion focuses on the calculation of h parameters for common base (CB) and common emitter (CE) transistor configurations. Users report issues with obtaining h parameters, particularly when measurements yield zero or infinite values. The consensus is that zero measured current may indicate an imprecise ammeter, and that small or zero voltage values should be disregarded to achieve accurate h parameter calculations. Proper measurement techniques are essential for reliable results.

PREREQUISITES
  • Understanding of transistor configurations, specifically common base (CB) and common emitter (CE).
  • Familiarity with h parameters in transistor analysis.
  • Basic knowledge of measurement tools such as ammeters and voltmeters.
  • Ability to interpret and analyze circuit results and data tables.
NEXT STEPS
  • Study the calculation methods for h parameters in transistor circuits.
  • Learn about the impact of measurement precision on circuit analysis.
  • Explore techniques for improving measurement accuracy in electronic circuits.
  • Investigate common errors in transistor circuit measurements and how to avoid them.
USEFUL FOR

Electronics students, circuit designers, and engineers involved in transistor analysis and measurement techniques will benefit from this discussion.

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Homework Statement



When I measure CB ciruit:
cx53fiyhqs1xxlokcfe.png

I have got these results:
xxer7tg35jruq8wnrxn.png


And here CE:
7i6xjfvb09dzkgncvt6i.png

1od1gc5pnuzqx0w8x0.png



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?
 
Physics news on Phys.org
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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