How should I approach the question with a solution? I don't have much of an idea, I need it urgently. Assume RL resistance is 20k

 

Welcome to AAC!

Is this for school?

 

Welcome to AAC!

Is this for school?

Thank you
Yes it is a sample question for exam

 

Hi copy,
As this is Homework you need to show your best attempt at answering, we can then help you.

Moderation.

 

What is the voltage level for -Vcc?
Or is it something else that you are required to determine?

 

View attachment 351036
How should I approach the question with a solution? I don't have much of an idea, I need it urgently. Assume RL resistance is 20k

Common Emitter Amplifier

 

What is the voltage level for -Vcc?
Or is it something else that you are required to determine?

It states Vcc = 15 V
Hence, one must assume +Vcc = +15 V, -Vcc = -15 V

 

It states Vcc = 15 V
Hence, one must assume +Vcc = +15 V, -Vcc = -15 V

Oh, I was about to suggest 0V !!

 

Assume RL resistance is 20k

Why would I do that when the problem states 10K?

 

Oh, I was about to suggest 0V !!

It would be difficult to get a 24Vpp output with a 15V supply differential.

 

If RL is 10k Ω, start with Rc = 1k Ω.

 

View attachment 351036
How should I approach the question with a solution? I don't have much of an idea, I need it urgently. Assume RL resistance is 20k

The you need to go back into your text (or other material) and get some idea this time around (revisiting concepts that didn't gel the first - or nth - time is part of the learning process, particularly in technical subjects).

The show your best attempt to get as far as you can. If nothing else, determine what you think are limits on min/max component values in order to satisfy the various specifications.

Do that, and then we are in a position to point out things you've done right and wrong, and also things you've overlooked so that you can see how they affect your results thus far.

 

you know that the output voltage needs to vary by approximately +-12 to give you the peak to peak voltage swing. You know the attenuation at the corner frequency. So given the knowns you could start by calculating Vcollector at the corner freq, this should allow you to calculate Rc. Thats a starting point

 

I wonder what the point of designing it for 10Hz cutoff it it's going to have a high-pass frequency of 20kHz?

 

I wonder what the point of designing it for 10Hz cutoff it it's going to have a high-pass frequency of 20kHz?

I think it means the AC pass band starts at 10Hz, so just DC blocking.

 

I wonder what the point of designing it for 10Hz cutoff it it's going to have a high-pass frequency of 20kHz?

I think that it probably meant to say that the "high frequency cutoff" is 10 20 kHz.

Edit: Fix typo.

 

I think that it probably meant to say that the "high frequency cutoff" is 10 kHz.

I took it as audible range 10Hz to 20Khz, not that it changes the approach

 

I took it as audible range 10Hz to 20Khz, not that it changes the approach

The 10 kHz was a typo on my part.

I'm also assuming that it is supposed to have a first-order band-pass characteristic with corners at 10 Hz and 20 kHz.

But that IS an assumption.

Ideally, the TS should go back to the instructor and ask for clarification. If nothing else, that demonstrates that the student is actually paying attention to the specifications, which in and of itself is actually shockingly rare.

 

We know what the writer of the assignment meant. It is simply worded with the opposite of what was intended.
It should have said low pass filter with cutoff frequency at 20 kHz.

 

We know what the writer of the assignment meant. It is simply worded with the opposite of what was intended.
It should have said low pass filter with cutoff frequency at 20 kHz.

How much confidence can you have in the course if whoever is writing the assignment makes such a basic error?