EveryCircuit - voltage resistant current sinks

2ctiby

8 years ago

Variation using Nmos here ... http://everycircuit.com/circuit/5683396771840000

crake

8 years ago

Thank you 2citby

hurz

8 years ago

Thank you @crake you are to kind.

hurz

8 years ago

@2ctiby, were do we get the constant voltage source from?????

hurz

8 years ago

If we would have a constant voltage why not do it this way 😵 http://everycircuit.com/circuit/5616229120475136

hurz

8 years ago

Professor 2ctiby? Hello?

2ctiby

8 years ago

@Hurz... crake and abobaker are just exploring constant current circuit variations with the use of fets...... here is yet another exploration just for interest sake ... http://everycircuit.com/circuit/4560484283187200

hurz

8 years ago

Professor @2ctiby, 😵

hurz

8 years ago

@2ctiby, to make it clear for you, the challenge is to make it without any constant reference. Sure, No constant current source, and also NO constant voltage source! This is the challenge!!!!!!

2ctiby

8 years ago

@Hurz ... you seem to be looking for something different to that which crake was seeking...perhaps crake would like to clarify what he was trying to achieve if it was other than a fixed value current output regardless of a changing voltage.... If you are referring to the gate volts as a fixed reference, then sure, that is an external feature which is a necessity, and does not detract from the aim of achieving a stipulated fixed value constant current such as 20mA. It could perhaps invite further development with a view to feedback to the gate in some kind of hysteresis/AGC/PID way if that is what you have in mind... but that is beyond this thread.

zorgrian

8 years ago

AttwoCityBeeProf, why do you get to decide what's within the scope of this thread? Maybe you're a threadworm? Or you like to tread on the heads of others?

hurz

8 years ago

He is a mind reading machine, unfortunately likes to mess up anything.

crake

8 years ago

The idea was to test several practical current sinks over a wide range of voltages.

hurz

8 years ago

Right, and I guess the challenge is to make it just with a single 10-70V supply?

crake

8 years ago

That is correct

2ctiby

8 years ago

And that is exactly what we have been dealing with here all along...Hurz does not seem to understand that the changing Vds between 10v and 70v makes little difference to the Nmos drain current whilst in Saturation...hence the straight horizontal graph line and the fixed current for the LED. But like I mentioned initially...I would not advocate this method because that horizontal graph line gradient will come in to play to some extent over such a large Vds range.... more noticeable as the fixed drain current is increased...eg more noticeable at 25mA than at 2mA etc....and that fixed required drain current horizontal line value is primarily determined by the squared overdrive setting which you apply, multiplied by the Kn

zorgrian

8 years ago

Step down 2cityBees, your argument is secondary as ever to your obnoxious stance. Why do you say that 'we' have been dealing with a subject that in truth is your own mantra. We accept you seem to know about MOSFETs and the simulation thereof. However, it is not the only subject within all and everything on EC. Furthermore, until the recent introduction of a MOSFET into these current sink examples, MOSFETs were not within scope!

hurz

8 years ago

@2ctiby, remove your 8.6V dc voltage source and we can start talking about your mess. No, without a DC source it wont make any sense, @2ctiby, dont be to stupid and stop your messing before you understand the challenge!

2ctiby

8 years ago

@Hurz... take a look at your 'help' on someone's Mosfet here earlier today ... you have got over 100kV at the drain terminal to run a small LED lol http://everycircuit.com/circuit/5610996877230080

2ctiby

8 years ago

@grrrr grian ... we were discussing the merits of mosfets which you know nothing at all about...so keep your nose out of such things

zorgrian

8 years ago

@2nastyBee, I don't really see much 'we' discussing MOSFETs apart from yourself, which is fine business were you a king.

zorgrian

8 years ago

Since you are not a king, please don't be such a nasty buzzing bee...

zorgrian

8 years ago

I thank you in advance for your cooperation

hurz

8 years ago

Mr 2cent, you start your bad behaviour again with bad propaganda, just because you do not got whats the challenge here, there is no reason to be a nazi. So stop that. Right, "we" are talking ... , its just YOU. Nobody is talking about mosfets. Maximum we have talked about JFET in parallel threads, which are also much above your knowledge.

2ctiby

8 years ago

Ok ... its not quite so funny now that you've altered it, but it must be amusing trying to explain similar nonsense to your tax man. Let's continue the laughs ... ref: http://everycircuit.com/circuit/4896180537655296 http://everycircuit.com/circuit/4907406609088512

hurz

8 years ago

I dont get what so funny about a current or voltage source in some parallel thread except you do want to irritate users not watching this thread here? It was you who just dont get what the challenge is here, sorry. And now you try to be funny? Lets go to this thread and I will answer you any question you do have about current and voltage sources!

2ctiby

8 years ago

A hundred thousand volts at your Mosfet was funny to me Hurz...you and Grrr grian are not funny though...you are a dominating pair of dickheads who try to rule this site...I want nothing to do with either of you.

zorgrian

8 years ago

Hmm OK agreed but how do we block you out? Maybe try the new discord server? Hmm?

hurz

8 years ago

And even it would be a mega volt, thats not the point. I just made the current source from perfect a not perfect one, and this is the way you do that by placing a resistor in parallel. I dont understand whats so difficult for you to understand? If you know the final Uzero of this current source then just place as I demonstrated a zener, but we do not know so far. Anyway the question was why its circuit was not blinking and with my adaption it is blinking. So whats so strange for you Mr @2ctiby?

zorgrian

8 years ago

2seethingBees, what is this 'dickhead' parameter of which you reference?

hurz

8 years ago

As usual, at the point he understands his bullshit he gets aggressive against anybody.

hurz

8 years ago

To algin the mess of comments here we go as @2cent needs to know "Again for your stubborn mind and your continues blablabla about mosfets. "The Challenge is to make a current sink passive as constant as possible and test it against 10 to 70V" if you cant accept that you have to open your own thread and hope for any interesst in audience or continue your spam help here and fail then topic."

zorgrian

8 years ago

Or 2cent can try the new discord server forum... See what happens there?

zorgrian

8 years ago

There is a warm welcome on the discord server for the 2centBee

zorgrian

8 years ago

@hurz, it/he mentions tax man! This is worrying as only taxmen mention the subject of tax out of context. I surmise therefore that he/it is a crumbling ex tax man with deep unresolved regrets of not having been a schoolmaster

zorgrian

8 years ago

Unfortunate that the discord server has no virtual blackboard, schoolmaster uniform nor unmoderated BeefJerkyOff license

hurz

8 years ago

Im open to new or creative ways to teach, but for this guy I just dont get what he is doing. He start on top at macroscopic things to go down into the microcosmos which he does not understand. How can he do good things in macroscopic ranges to be sure it makes microscopic any sense. E.g. his effort he spend to understand mosfets in linear operation is a way into a dead end. Most applications with mosfets are switching ones, even in RF. Ok there are some like BF245 as amp, but in power application its always non linear switching. So he always tries to explain anything with its linear knowledge he gained but forgets the real challenge of topics and starts to be pain in the a..

2ctiby

8 years ago

@Hurz... All technical queries welcome regarding Mosfet Ohmic (which I prefer) or Saturation (which I describe for interest/reference)... please try to avoid non-technical personal statements. I realise that it stems from your lack of knowledge in these matters, but I will not tolerate it. http://everycircuit.com/circuit/5338883035496448

hurz

8 years ago

You dirty bastard started to be personal and you continue with statements you cant proof. Nazi propaganda semse to be the only thing you can do good. Everything else is just messing around in wrong thread publishing bullshit circuit which are completly off topic! Bastard

hurz

8 years ago

After the monent @crake clarified the challenge you get nasty and rude. Why? Cause you self see how idiotic you failed again reading and understanding this circuit and whats the idea behind. Ok, but dont blam others for your low experience, better just shut up before being an asshole!

zorgrian

8 years ago

@hurz. ich bin sicher, Nazi-Propaganda ist keine gute Sache; Aber wenn es nur @nastyBees möglich ist, ist es dann möglich, eine hochsichere, einfache Institution zu finden, die eine langfristige Behandlung ermöglicht?