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Explain current transfer characteristics. |
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Answer» Solution :This gives the variation of collector current `(I_(C)` with changes in base current `(I_(B))` at constant collector - emitter voltage `(V_(CE))`. It is SEEN that a SMALL `I_(C)` flows even when `I_(B)` is zero. This current is called the common emitter leakage current `(I_("CEO"))` , which is due to the flow of minority charge carriers. Forward current gain: (i) The ratio of the CHANGE in collector current `(DeltaI_(C))` to the change in base current `(DeltaI_(B))` at constant collector - emitter voltage `(V_(CE))` is called forward current gain `(beta)`. `Beta=((DeltaI_(C))/(DeltaI_(B)))_V_(CE)` (ii) It is value is very HIGH and it generally ranges from 50 to 200. It depends on the construction of the transistors and will be provided by the MANUFACTURER. 
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