Hello Ference!
On 4/29/19 8:26 PM, Éger Ferenc wrote:
Sehr schön. Looks very good for starting point. A little remark: I think the M6-M7-R1 complex will need to be replaced to a constant-gm reference (otherwise the bias current will be highly supply-dependent). Also, "syntax error" near M1-M5 (floating gate).
I already fixed the floating gate issue - thanks for eye-balling :-)
The whole schematic I took from Wikimedia (the link is already in the Schematic Title Block), including the M6-M7-R1.
As I mentioned, I did some investigations and found slightly different versions. This Wikimedia Version has the 4th Resister R1 as a property.
I'll draw all other versions also, which I found. One has a addtional diode eg. I think we should collect all version first and than discuss and find the best one for us, which we implement.
I would recommend that we move the repo under libresilicon (it is easier for others (newcomers) to find there, there is already a sort of chaos from repos distributed under multiple users).
Done. Now on https://github.com/libresilicon/CMOS-555
BTW, I am curios about this Video from the EEVblog (https://www.youtube.com/watch?v=XZ4r8Rc5aus) - he claims (not) to found a Easter Egg in the 555. It is at least a very strange behavior. I am not sure, whether the 55.5 Hz modulation on 55.5k Hz is a fake or not. Well, it was published on March 31, one day before April fools day..
What do you think about that??? engineer's joke - or, did someone has some original 555 for bread-board evaluation?
Regards, Hagen.
On Mon, Apr 29, 2019 at 2:17 AM Hagen SANKOWSKI <hsank@posteo.de mailto:hsank@posteo.de> wrote:
Hello List! Today on our weekly Mumble session we talked about the "triple-5" once more. So I got itchy fingers and set up my personal repository for that on github (https://github.com/chipforge/CMOS-555). Well, no repository without content - please check the README file and see the Schematic I already draw now. For everybody which is lazy to install Lepton-EDA (as describted in the README) I attached a fency screenshot. Please check the Schematic, based on the Wikimedia SVG drawing, for mistakes I did. All dimensions for the transistors (Width, Length) and the restistors (Resistance) are still just generic. This task I suppose will do someone of you which is more an analog guy than me :-) BTW, Tatzelbrumm and Ference, do you like to clone the repository and we're merging each other? Or, otherwise I can shift the repository to the github.com/libresilicon <http://github.com/libresilicon> group and we are working there. What do you prefer? Best Regards, Hagen. P.S.: Other versions of the CMOS "555" circuit I saw, will follow soon as schematics - one e.g. even has on BJT. -- "They who can give up essential liberty to obtain a little temporary safety, deserve neither liberty nor safety." Benjamin Franklin (1775)_______________________________________________ Libre-silicon-devel mailing list Libre-silicon-devel@list.libresilicon.com <mailto:Libre-silicon-devel@list.libresilicon.com> http://list.libresilicon.com/mailman/listinfo/libre-silicon-devel