Hi I all, I just learned the working of a common emmitter amplifier, biased with voltage divider bias. Now, from what I learnt, I understand that, we feed input signal to base, then inside the transistor amplification process takes place ( I know how does it theoratically... I dont konw how EXACTLY the current flows during amplification.. And I also seems not to understand how the electrons from base crosses the reverse biased BC junction.. ).
Well, after the amplifiaction process, we get our output signal at collector. All fine upto here.
Now I know that the resistance at the emitter is for the biasing purpose, and the capacitor which is connected in parallel with it (i.e. bypass capacitor) is used to provide low impedance for the ac signal.
and I exactly dont understand this thing at all. I read several posts, several references but I am just not getting that..
I have googled one sample circuit just for reference and it is located at here >
http://hyperphysics.phy-astr.gsu.edu/hbase/electronic/ietron/npnce2.gif
Let me short my question,
How can the AC current flow from that capacitor which is grounded when all the amplification process is taking place in BJT and we are even getting output at collector.
I am very damn confused about the current flow in the circuit as well..
Please help me guys, my final exam of Solid State Devices And Circuits is only one month away!! thanks in advance.
Also, if I am wrong correct me please.. thank you guys..
Well, after the amplifiaction process, we get our output signal at collector. All fine upto here.
Now I know that the resistance at the emitter is for the biasing purpose, and the capacitor which is connected in parallel with it (i.e. bypass capacitor) is used to provide low impedance for the ac signal.
and I exactly dont understand this thing at all. I read several posts, several references but I am just not getting that..
I have googled one sample circuit just for reference and it is located at here >
http://hyperphysics.phy-astr.gsu.edu/hbase/electronic/ietron/npnce2.gif
Let me short my question,
How can the AC current flow from that capacitor which is grounded when all the amplification process is taking place in BJT and we are even getting output at collector.
I am very damn confused about the current flow in the circuit as well..
Please help me guys, my final exam of Solid State Devices And Circuits is only one month away!! thanks in advance.
Also, if I am wrong correct me please.. thank you guys..