circuit Diagram

[Khalid57]

hi

this is an electronic Question ??


I can't answer it..........!!

It's more than difficult for me


You are provided with a single stage circuit and associated circuit diagrams, (Fig.2 below). With reference to the circuit briefly answer the following:

**broken link removed**


1) Identify the circuit’s function.



2) Using the circuit diagram component reference number briefly describe the operation of the circuit.


thank you very much

and I am waiting for the answer

If anyone could help me !!!

I would be very greatfull for him

 

[ljcox]

It is a basic amplifier. Search the internet for common emitter amplifier.

 

[audioguru]

That is the most simple amplifier circuit that I have ever seen.

 

[gramo]

Lol, I see Khalid57 has bad rep after 8 posts

 

[audioguru]

Lol, I see Khalid57 has bad rep after 8 posts

Maybe because he doesn't know anything about electronics?

 

[Khalid57]

hi every body

as every body say

It's pasic and easy and simply

but for me

for me

for me

I don't know what's mean realy

I know nothing about the electronis

so if anyone can help me

that's ok

and I hope I WILL learn how to do it in the future


thx again


waiting >>>>>>>>>>>>>>>>

 

[ericgibbs]

hi khalid,
If as you say you don't know 'anything' about electronics,
who has asked you to answer this question.?

If its your college/school tutor he must have taught you some electronics before asking the question
and you should have gained enough knowledge to attempt an answer.

Am I wrong??

 

[Khalid57]

Hi ericgibbs

I don't know any thing about electronic ???

This Question is given to me from college..

I started to do this cource since 23rd of april last month

and the teacher gave us lots of question

and he want us to answer it using other peaple to help

or searching on the internet

without even tell us how it work or what it is ??

He just said it's an diagram showing a amplifire >>>>

and we should find out what does it mean

and answer all these question


I must give him the answer in 3 days time>>>


If any one could help me ??

and explain to me how it work

and what it is

and how I answer those question

I will be very pleased with him !!!


thank you again

and sorry for interibting you

I am pologize about all the causes I did

^_____^

 

[ericgibbs]

hi khalid,

There is no need to apologise to me!.

I think its your tutor who should apologise to the school who pays his salary.

To ask you, to search the web in this way is unreasonable, its not the correct way to learn a subject.
You should be taught the topic in class and then asked questions to determine what you have learned/remembered.

 

[Nigel Goodwin]

To ask you, to search the web in this way is unreasonable, its not the correct way to learn a subject.
You should be taught the topic in class and then asked questions to determine what you have learned/remembered.

Well we don't know the circumstances, the OP may not be paying attention in class?, he may haved missed some of his classes?, or he may be in the wrong class? - there are plenty of other possibilities rather than a crappy teacher (although that's certainly an option!).

 

[Khalid57]

I agree with you Mr ericgibbs .... !!

also I know that we should be taught the topic in the class ...!!

but our tutor

think
it's the best way to learn is to have the question

and answer it with your knowledge

or your experiance

and if you have no experiance how to work it out

then you ask what ever you want to help you with it

as long as he explained it to you !!!


I know sir It's not your job to teach me

or to answer it for me

or to even post any thing ^___^

but as you know my friend

I have know experiance of electronic at all

and all I do is try to answer any thing by own ...

for example I did answer task 1

with google and with some other people ???


The Task was ???

Task 1

a. When working as a technician.
List health and safety requirements necessary of this task.-

Use caution when lifting anything.
Don't work in wet or damp areas.
Wear Safety spectacles & gloves.
Qualify your self & build in safety place.
Use insulator tools & work carefully.
Switch of the solder machine when finished.
Wash hands and face frequently.

B. Identifies typical work place hazards that may exist?

Working in uncomfortable place.
Burns your hands.
Handling & Storage of materials.
Seating and workstations.
Working alone or under suspended machines.
Currying heavy items

C - Explain the importance of applying safe working practices in electronic system?

Firstly I would say that carefully work is your safety and speed work will remorse you.

However I think the main reason of applying safe working is the high cost of capital for the project components being spend until the completion of the electronic project. Which mean knowing the MAINTENANCE of work is important for employees.

Moreover you should PREVENTIVE MAINTENANCE & CORRECTIVE MAINTENANCE when working with electronic system.

In conclusion I say prevention is better than cure and we must be complied with labor laws which lead to constant evolution.

and I did answer it all using google and othe peaple help

and they explain the answer 4 me very will !!!


but this question I can't find the answer any where

so If any one could answer it

and explain how it's work


I will be very pleased

thx again


waiting ...................

 

[Nigel Goodwin]

The questions are basically common sense, work them out!.

 

[Khalid57]

hi Mr Nigel Goodwin

Thank for your advice..

I will try to do my best to answer it mate


thx again

 

[gramo]

It would have taken longer to type the message, then to think about the answer

 

[arod]

In analyzing the circuit, you would need to use Thevenin's Theorem for R1 and R2. You will also need to know basic transistor theory.

Rth = R1 || R2
Vth = 9*(22/104)

Then you can locate the DC quiscent-point of the circuit via the BC108 transistor's characteristic curves. With an AC input before capacitor C1, the quiscent point will move along the load line and give a proportional voltage output at the common-emitter terminals, which is just the input signal amplified. Below is a general picture of what I am talking about:
**broken link removed**

This post was just meant to give you the general idea and give you a hint. You will have to do a bit more research to understand the operation completely.

 

[Khalid57]

thx gramo for your post ^_____________^


Mr arod ^__________^

thank you very very very much for your help....

I will do more recerch to understand it completely


Iam very pleased with you sir

That's very kind of you

I'll do my best

thx again

^_______^

 

[Khalid57]

It's me again

It's a good start what Mr groma said

Now I need to explain how R1, R2 and R4 set the bias for the NPN transistor.


And then I should explain how R3, R4 and C3 set the gain through the amplifier.

After that explain the effects of C1, R1, R2, and C2 and R3 on the amplifier bandwidth. And using typical specs for a small-signal transistor like a 2N3904, draw the Ic vs. Vce curves like I show, with appropriate Beta gain considerations in the fan of lines, and I should draw the load line, and show how if varies with frequency.

I know all that steps I must do ???

But the problom I don't know how to make a start
or how to solve those steps I told ???

would anyone mind helping me please ???

^______^

 

[audioguru]

Your teacher should teach you how to make a start.
Your teacher should teach you all about the simple transistor amplifier so you can understand how to solve the steps.

Why should we be your teacher?

 

[Khalid57]

audioguru

I didn't said you should be my teacher ???

I know my teacher should do all that ...!!

but today weekend !!

so I should do my work even if the teacher not her .

I should ask for help

I think this forum for help

Not for teezing peaple who have dificulteis with their work !!

so please read what I wrote in my POST before

I wrote -- if anyone dob't mind help me ???

not if anyone teez me


thx alot anyway

I felt sorry to ask for help ):

 

[audioguru]

You won't learn anything if somebody else does your homework for you.
You need to learn about the basics of electronics. Resistors, capacitors and transistors.
Then you need to learn about analysing existing circuits and designing new circuits.