Im curious if they will raise the the task, until the actual fv counter arrives. ???
Im curious if they will raise to the task, until the actual fv counter arrives. See? Small shht like this I am not allow to repair in my previous postings because this website is made against user !
q12x : Since you mentioned the problems caused by resistance and capacitance in integrated circuits operating at high frequencies or switching speeds I thought you might enjoy reading this article:
In processors and graphics cards, what limits your clock speed? - https://techunwrapped.com/in-processors-and-graphics-cards-what-limits-your-clock-speed/
And I did enjoy it. I do like MCU's, and I only worked with PIC's so far, and very limited range and very few applications I used them. I didn't go nuts with them as I wished when I discovered them in my youth. But they remain a fascinating literature for me. So the RC problem in CPU's, conform to your article, is due to the micro-wiring length and thickness, remaining constant over time while the transistors got smaller. If I understood it correctly. Very interesting. Yes. Actually mister
@pc1966 spotted that RC problem in the last FF (flipflop) circuit and I concluded on his finding.
Another limit is temperature rise of the ic. Because many yet small capacitors are being charged and discharged very frequently/at a high rate - Giga Hertz in some devices - there is a significant heating effect caused by the many but small currents moving the electrons in and out of the capacitors. You know that when a current flows through resistance there is heating which causes ics like processors to warm up. So they are fitted with heat sinks and fan blows across them otherwise they would overheat and burn out. Thus, keeping the ventilation holes of your computer unobstructed is a good idea. (In the computers I worked on in the 80s with many microprocessors the air was cooled first by passing over fins cooled by chilled water at 5C.)
I admit, I didnt got this interested like you did about the internals of a CPU. Very nice explanation ! I like it. As a fact, everyone got amused when coming into my room and seeing my desktop PC case with one side open all the time and an external black fan blowing into it (actually towards my 2HDD), and they asked me "is it broken?" and I respond, "no, it is properly cooled". I got into this arrangement from my very first computers and it stay with me until today. I also highly recommend it. The downside it is getting dusty, quite quickly, so 1/year I do a total cleanup, I take out the processor, re-paste it, clean everything from dust, especially its heat sink radiator, that usually develops a fur on it, like a little rat.
By the way, signiori
@marconi you worked in computers in the 80's you said, what did you do? Also tell me your expertise, what you did and know the best, what you master, and what you really enjoy. I realized I know nothing about you and now is a good time to ask. The same question to mister
@pc1966 as well. Im equally interested.
I tried a quick SPICE simulation and (a) it did not work properly (toggled only first time) and (b) even then you are looking at switching times of around 10us, placing the max speed at below 50kHz even if it had worked as hoped!
Thank you for trying that. I am not that good in LT Spice. I have it on my pc but i cant say im good in it. Only to a point and that is a very low point.
Here is a 74HCT73 dual jk flip flop in cascaded toggle mode with first ff being clocked at 20MHz and scope showing 2Q output of second ff. thus divide by 4 to five 5MHz
I do not have any HCT93s to hand.
Ahaa, an experiment, very interesting result !
See if you can obtain my results: 1/10, then 1/100, then 1/1000 divisions. As a challenge of course. Also I highly recommend to use the 555 circuit that I used. Extremely helpful but to a limit as we all know it now.