High Frequency Distortion

You like "sunday BJTs" a lot?

What's that supposed to mean? Are you trying to say that this circuit is vulnerable to hfe changes before even looking at it? I can tell because there's a zero, not a one, under the eye symbol.

Just checked, the only differences in behavior due to uneven hfe change is in the amount of "high frequency distortion" that this circuit suffers from, otherwise any changes will be negligible because of the strong negative feedback.

Right, you do circuits just for simulation, not for reality as you said.

I still don't get what the problem is, if I know that there's a problem making it unrealistic I will make some effort to fix it. I care about making circuits for only the simulation 2/3, there's still 1/3 in there that wants to make it as realistic as possible.

And I'm also curious about what the problem is.

Sunday on Monday http://everycircuit.com/circuit/4750283731369984

This sounds like "I give a shit on real life circuits" no? ....jason9..... I just didn't realize that that would be a problem when I made the circuit and I didn't really care because it's a perfect sim and it's not like I'm actually building it in real life.

And this was just a "SIMPLE AMPLIFIER"

Well, it's just I don't care as much about realism because this is just a simulator, but if I can do something to increase the realism, then I most likely will, and, I believe I've said this before, but I can't follow links. Also, could you please try not to be very rude? It's not very nice.

Sunday was yesterday

Are you implying that I had a conversation with you yesterday, because I don't remember having one of those yesterday, and I spent most of that day reading the last half of the last Harry Potter, not messing around on here and with you. But, as always, any one of us could be mistaken, me included.

And, anyway, what is unrealistic about this circuit? That's all I want to know, but you just insist on making a huge argument about this one small thing, refusing to just tell me the one thing.

It doesn't make sense if your iPad can't follow links (what a pitty) Check again "sunday bjt" and start all over again, because telling us its "simple" but youself do NOT understand it, should be embarrasing for you.

I don't get what circuit you say I don't understand, and if it is my Simple Amp circuit, than I was just saying that it is simple in the sense that it had fewer components and is easier to understand than most other amplifiers, however unrealistic, and unable to work in reality it may have been. And also, my iPad seems to do just fine with any kind of link or anything like that, as long as it is outside Every Circuit, but inside Every Circuit it just treats links and such as regular text (I can still click on someones name and see they're profile/circuits).

@Hurz? Still there? Did you happen to die of heart attack because you actually considered being nice and not arguing and other pleasant things? Just kidding!

Function over fashion always steers me away from I-crap. I can't even function the price tag.

There are at least two sunday-bjt's in your amp. Open your circuit and reduce both 1MegOhm to 300kOhm. This is what I have demonstrated in my first link to your circuit.

It is true that on EC Apple devices do not allow you to follow links - can't even copy them to paste in browser. EC needs a tweak! If you have a PC to hand you'll find it's easier - but less convenient :-)

@rich2229200 - lol.

@hurz, I still cant see how this circuit malfunctions if one of it's transistors has an hfe increase (or the 1MOhm resistors are dropped to 300kOhms), because the negative feedback fixes any such problems, unless, of course, you leave one of the inputs floating, which would be a very bad idea anyway.

The negative feedback can be missused to compensate a bad design. Such abuse is not what good designer do. Dont you see with 300kOhm the distortion is gone? Anyway, even with 300k its still a sunday bjt.

Check this and dont tell me you can not follow a link http://everycircuit.com/circuit/5696776581414912 Android supports links iOs seems to not support them. So iPad users must be a little more creative and copy this nr 5696776581414912 and paste it here into the search field. Not taking it to a browser, what a mess!

Unfortunately, I can't copy and paste text that someone has put up, but I'll try and see if I can do it by hand. Also, the distortion goes away because it simply responds faster, if I were to also increase the input frequency than I'm sure the distortion will come back. And by "sunday bjt" I presume you mean a transistor that causes the circuit to malfunction when it's hfe increases, is this correct? I don't get what you mean by I'm misusing the negative feedback, usually one wouldn't hook up the output directly to the negative input, but rather through a voltage divider in order to get the desired closed-loop gain, but that doesn't mean I can't connect the output directly to the negative input so that someone could easily see the distorted signal in comparison to the original signal, does it?

You could also give me the name so that I don't have to get all those numbers and stuff from here to there, I mean, is it that hard to just tell me to search "Temperature Compensation"?

That's weird, it's not showing up when I search for it, I even double checked the spelling. I'll try something else.

Looked at the circuit description online, it seems you're trying to say that if the advanced current mirror in this circuit has any uneven hfe the circuit won't work as intended, but because of the high gain, almost any negative feedback will completely remove any problems.

Ok, I just didn't look far enough when I searched the circuit's name, how stupid. I now understand that you probably want me to put resistors as it's own negative feedback to compensate for uneven hfe. I, however, don't think that that is necessary. Because of the reason I mentioned in the last comment I posted.