Ie = Ic + Ib
Look at this pic. It’s a strip from a very old book titled Banish the mysteries of Electronics. Of the several illustrations it has, I liked this one. IE = IC + IB , transistor currents relation.
I never understood this relation or atleast never reasoned it, when I was doing my graduation. To discover something which is so simple…years later is awesome. ( Click on the picture for better clarity )
You will appreciate this more, if you know that these currents a have non-linear relationship. Small base current controls large amounts of Collector current. But only till a certain point. Once the base current crosses a certain threshold, it has no effect on the flow of the collector current and we say that transistor is saturated.
Bringing out such a non-linear relationship in a picture is tricky.
Great piece of imagination.
Thanks to Levin who picked up this book for me, from Commercial Street’s second hand book shop.
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dhia, and 
Niranjan are discussing.
Niranjan 9:03 AM on August 22, 2007 Permalink
I am scared of some thing that says “Electrical/Electronics /Mathematics” , These are the subjects that makes wanting to go back to school again!!.
ATM 9:26 AM on August 22, 2007 Permalink
I still think that something mysterious happened in that microsoft interview. Did you scare him ?
Niranjan 9:40 AM on August 22, 2007 Permalink
Next i come to bangalore for interviews , i will see how good you are !!.
dhia 2:47 AM on April 23, 2009 Permalink
thanks for the illustration .