Amplifier question.

[SDPHD]

I saw this question and I'm not sure how to approach it.



I'm sure its simple but I don't get it while looking at it and the assessment report isn't much help.

[Vincezor]

First off, you have to realise the signal is clipped at -10v and +10v, so the linear region is before then



I'm going to use the signal time between 0ms and 5ms, for the sake of simplicity however you can take it from anywhere that it is NOT clipped.





I think they accept both -50 and 50, however I recall the chief examiner saying somewhere the negative was unnecessary? This question doesn't say state the magnitude of the voltage gain, so :S

[Andiio]

First off, you have to realise the signal is clipped at -10v and +10v, so the linear region is before then



I'm going to use the signal time between 0ms and 5ms, for the sake of simplicity however you can take it from anywhere that it is NOT clipped.





I think they accept both -50 and 50, however I recall the chief examiner saying somewhere the negative was unnecessary? This question doesn't say state the magnitude of the voltage gain, so :S

I'm quite sure they accept both +/- values of the voltage gain

[onur369]

You can state whether it is inverting or not instead of negative.

[SDPHD]

Thanks guys, after a lot of thinking I ended up understanding it.

I know this isn't that relevant to the current course but I still would like to know what it means and  how to do it.



Thanks.

(Sorry for the massive picture, had to scan it)

[Vincezor]

I'm going to guess:

Vin = 0.6V
Vout = 4.0V

Basically you're looking for the quiescent point (unless this is different in transistors) but I'm assuming it'll be the same for both amplifiers and transistor amplifiers...

[SDPHD]

I'm going to guess:

Vin = 0.6V
Vout = 4.0V

Basically you're looking for the quiescent point (unless this is different in transistors) but I'm assuming it'll be the same for both amplifiers and transistor amplifiers...

Yeah, thats the right answer.

So in a question like this, you read off the values for the middle?

[SDPHD]

Also one more question, what is the function of a capacitor (particularly in that diagram)?

[meihk]

hey gais i would like to know where could i buy a capacitator?

[cranberry]

2009- English (23)
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are these legit?

[Vincezor]

Yeah, thats the right answer.

So in a question like this, you read off the values for the middle?

Yep, the middle of the linear region though!

Also one more question, what is the function of a capacitor (particularly in that diagram)?

Sorry I have no idea in that case, but I presume you wouldn't need to know as it is a transistor-related question which is no longer in the course.

hey gais i would like to know where could i buy a capacitator?

capacitator? you trollin' bro? haha

[RobM8]

Voltage gain has no + or - sign.

I lost my mark on Exam 1 last year for that (I think).

[SDPHD]

Yep, the middle of the linear region though!

Sorry I have no idea in that case, but I presume you wouldn't need to know as it is a transistor-related question which is no longer in the course.

Awesome, thanks.

Yeah I won't worry too much about the other question.