4 stage amp

150

01:56:29

Just playing around hooking up different configurations 

AI = 
AV = 
AP = 

published 8 years ago

crake

8 years ago

What motivated you to put a CC at the input?

hurz

8 years ago

Maybe input inpedance little below 5kOhm down to 220 Ohm for the price of harmonics!

ddonahue686

8 years ago

Input impedance and current gain

hurz

8 years ago

But you see that almost all distortion is also generated here!?

ddonahue686

8 years ago

Put the common base in front now...

hurz

7 years ago

And what, you changed the order, and why? What is better now?

ddonahue686

7 years ago

At as a student one of the labs to teach multistage amps was the original 3 stage that I had here. I’m just messing around trying to learn how to improve the original design.

hurz

7 years ago

So is your latest change a step back or ahead?

ddonahue686

7 years ago

Lol at this point it seems to be a step back... how would you improve it?

ddonahue686

7 years ago

The only thing that improved was the layout

hurz

7 years ago

I dont have the previews version so I cant compare

ddonahue686

7 years ago

http://everycircuit.com/circuit/6193656871780352

hurz

7 years ago

I see, everything in forward. Already the CC brings a lot of distortion, which brings me to the question, what is this ampilier for, Audio headphone?

ddonahue686

7 years ago

It’s just a simple breadboard build with a small speaker on the output (inductor) we had to tune it and as long as the teacher could hear a clean undistorted sound then you pass the lab. Problem came up when they switch out the speaker with a smaller one that fit on the breadboard. The new speaker didn’t work well at the listed frequency (200hz) it was very faint and needed to be boosted up a little more and a slightly higher frequency (800hz). So I rebuilt it here to mess around with it to see how I could improve it.

add comment in editor

EveryCircuit is an easy to use, highly interactive circuit simulator and schematic capture tool. Real-time circuit simulation, interactivity, and dynamic visualization make it a must have application for professionals and academia. EveryCircuit user community has collaboratively created the largest searchable library of circuit designs. EveryCircuit app runs online in popular browsers and on mobile phones and tablets, enabling you to capture design ideas and learn electronics on the go.