do we have to understand the amplifier circuit with the transistor in it?

[mano91]

for new course.
if so, can someone explain to me all the components etc.

[TrueTears]

Transistors are not in the new study design. They were part of the course until 2009

[mano91]

yes i know but i still see that circuit with the transistor in recent papers and it haunts me!

[NE2000]

First you've got the input

Then you've got the decoupling capacitor that will remove any DC component of the input

Then you've got the input biasing circuit, which is pretty much a voltage divider that will bias the input voltage

Then you've got the transistor, which is part of another biasing circuit thing that I don't quite get but basically you can use the collector current and Rc values to find the output voltage

Then a decoupling capacitor to remove the DC component again

Then your output

Most of those questions are doable.

[methodsboy]

from what i know, transistors are not relevant in the current study design

[jiranab]

recent papers.. ok. well then 1. are they 2009 practice? as if they're not and they aren't a text book theres some serious issues...

basically.. great u want to know more... but for now DON"T WORRY!?! pretend that u have never... and i mean NEVER heard of the word TRANSISTOR!?! erase it from ur memory until wednesday atleast.!?!

[Mao]

recent papers.. ok. well then 1. are they 2009 practice? as if they're not and they aren't a text book theres some serious issues...

basically.. great u want to know more... but for now DON"T WORRY!?! pretend that u have never... and i mean NEVER heard of the word TRANSISTOR!?! erase it from ur memory until wednesday atleast.!?!

Wait what?

Is that asking for advice or giving advice? I can't tell from all the ! and ? in there...

[jiranab]

no not really. just more of don't think about transistors..

[NE2000]

recent papers.. ok. well then 1. are they 2009 practice? as if they're not and they aren't a text book theres some serious issues...

basically.. great u want to know more... but for now DON"T WORRY!?! pretend that u have never... and i mean NEVER heard of the word TRANSISTOR!?! erase it from ur memory until wednesday atleast.!?!

I actually reckon it helps to know about them somewhat. I just did a 2009 practice paper where I didn't quite get the amplifier question but then I thought about how the question would have been written in previous years and it made sense again.

[dcc]

Does anybody really 'understand' transistor amplifiers?  The way that transistors are taught (or perhaps were taught) in VCE totally neglects the understanding of how a transistor actually works.  They are not so easily understood, which is probably half the reason they were taken out of the study design.

[Mao]

Does anybody really 'understand' transistor amplifiers?  The way that transistors are taught (or perhaps were taught) in VCE totally neglects the understanding of how a transistor actually works.  They are not so easily understood, which is probably half the reason they were taken out of the study design.

Agreed. The way the information was presented and tested were ridiculous.

On another note, transistor amplifier circuits are kind of obsolete now. Modern operational amplifiers (a fairly small component) usually consist of over a hundred transistors each. Unless you go on to do electrical engineering and designing new types of operational amplifiers, all they teach at uni now these days is how to work with operational amplifiers.