To amplify 0.05v a.c sine wave in Common Emitter NPN amplifier

[Gaurav satish shah]

 

 To amplify input signal  0.05V  a.c sine wave in Common Emitter NPN amplifier

 

  Since we need to amplify a.c sine wave, do electrons flow from emitter to collector during 

  positive half cycle and from collector to emitter during negative half cycle ?

     

  If direction of electron flow is always from emitter to collector,since NPN transistor in CE amplifier

  in active region, how do we get a amplified negative half cycle at the output.

 

  Since amplifier converts  d.c  to  a.c, and capacitors dont allow d.c in circuit,

  then according to a.c principle,current should alternate both ways during positive and negative half  cycle respectively.  

 

   Can someone please clarify and clear my doubt.

   

   Thanks and Regards,

    Gaurav Shah

 

 

 

 

 

[Ashutosh Bhatt]

i suggest you to read basic electronic related books that gives you perfect idea

[Gaurav satish shah]

 

 

  Dear Mr A M Bhatt,

 

 I went through Basic Electronics Books like Milman and Halkias,  also Boylestad,

 but could not understand

 

how there is:-

 complete a.c output ( -ve half cycle as well) if current direction dosen’t reverse in alternate half cycles ,

since huge ouput collector current flows in circuit corresponding to a.c input signal of small magnitude,

 and we get amplified  a.c signal at output.(collector)

 

Can someone please clarify. 

 

 Thanks and Regards,

    Gaurav Shah

[Author]

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