- #1
PainterGuy
- 940
- 70
Hello everyone,
I am trying to understand how a transistor works. Let's start with a NPN transistor. I read somewhere that NPN is just two diodes joined by sandwiching their 'P' regions between the 'N' regions. In other words by joining their anodes together.
Please have a see on this diagram:-
http://img577.imageshack.us/img577/8670/functioningoftransistor.jpg
I hope you understand the diagram. Actually both circuits are the same. In the second circuit I have used 'diode version' of a transistor. I have never problem accepting that D2 will be forward biased. "y" point will be more +ve than "x" point. But I do not understand how D1 will be forward biased because the point "w" (the cathode of D1) will be more +ve than the point "y" (the anode of the D1). In order for the D1 to be forward biased its anode should be more +ve than its cathode. Tell me please in simple way how this works. Much grateful for any help I can get.
Cheers
I am trying to understand how a transistor works. Let's start with a NPN transistor. I read somewhere that NPN is just two diodes joined by sandwiching their 'P' regions between the 'N' regions. In other words by joining their anodes together.
Please have a see on this diagram:-
http://img577.imageshack.us/img577/8670/functioningoftransistor.jpg
I hope you understand the diagram. Actually both circuits are the same. In the second circuit I have used 'diode version' of a transistor. I have never problem accepting that D2 will be forward biased. "y" point will be more +ve than "x" point. But I do not understand how D1 will be forward biased because the point "w" (the cathode of D1) will be more +ve than the point "y" (the anode of the D1). In order for the D1 to be forward biased its anode should be more +ve than its cathode. Tell me please in simple way how this works. Much grateful for any help I can get.
Cheers