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June 15, 2014 at 1:11 am in reply to: To amplify 0.05v a.c sine wave in Common Emitter NPN amplifier #11823Gaurav satish shahParticipant
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
June 11, 2013 at 8:49 pm in reply to: Reverse bias and forward bias junctions of common collector configuration #9949Gaurav satish shahParticipantHi Ajish, is there a way out of this common collector configuration topic
I am confused about it for a long time.
The Boylestad circuits I have inserted in last to last comments are genuine
We need to find how to go ahead about this. Do you have any solution or ask
it to your professors.in fact there is dearth of genuine professors in my area.
I have many other doubts too
June 4, 2013 at 9:52 pm in reply to: Reverse bias and forward bias junctions of common collector configuration #9892Gaurav satish shahParticipantHi Ajish,
The ckt I had pasted from Boylestad in last comments was in fact :
I took its picture by camera and then transferred it to computer,
so it is a true Boylestad circuit.
well to get that circuit, I am using Ninth edition of Boylestad
The copyright of this publishing is with Pearson Education
I am from India, and this book is an Indian subcontinent adaptation:
copyright@2007 Dorling Kindersey(India) pvt. Ltd
This edition is manufactured only in India and authorized for sale in
India, Bangladesh,Bhutan, Pakistan,Nepal , Sri lanka, Maldives.
As for page no,the diagram for common collector configuration occurs on
page 144 after the second paragraph.
Well, anyways, grounding the common terminal is must in transistor configurations
and your case even grounding may be assumed.
May 30, 2013 at 9:00 pm in reply to: Reverse bias and forward bias junctions of common collector configuration #9866Gaurav satish shahParticipantHi Ajish , take a look at Boylestad,s common collector configuration
Last time i had pasted photo of Boylestad’s common base configuration
So , here collector at zero potential.
base is positive compared to collector
collector base junction is forward biased
transistor cannot operate in active region
I am confused
May 26, 2013 at 4:32 pm in reply to: Reverse bias and forward bias junctions of common collector configuration #9831Gaurav satish shahParticipantHi Ajish,
I read your comments on Boylestad’s common collector configuration
By applying same logic to common base configuration,
wysiwyg_imageupload:8656: At base , -ve of VCC and +ve of VEE are connected together.
Now , VCC much greater than VEE. The approximate
values are VCC= 10V, VEE= 2V.
As such , base will be -ve and at -8V.
So base will be negative compared to emitter.
Then , emitter-base junction will be reverse biased
and transistor will not operate in active region.
I am confused..
Boylestad common base configuration
May 16, 2013 at 9:23 pm in reply to: Reverse bias and forward bias junctions of common collector configuration #9769Gaurav satish shahParticipantThanks a lot Ajish Alfred
Do you have Boylestad ?
In this famous book, page 144, common collector configuration is given
same as i mentioned, ie. collector to -ve and base to +ve
where as in your case , collector is +ve and base -ve which should actually be the way if transistor is to operate in active region
Alfred, which book have you taken the diagram from
and how are you able to paste it here, i want to know
Thanks a lot, please refer boylestad also and tell me how can get diagrams in the box
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