Neither of these simulations work. I must be missing something.

Thanks,
M

 

Neither of these simulations work.

What should be happening that isn't?
If there is no oscillation, try setting an initial non-zero voltage on a capacitor.

 

What should be happening that isn't?
If there is no oscillation, try setting an initial non-zero voltage on a capacitor.

The plot just slowly, and I mean slowly, draws a horizontal line and when it
is done, the plot pane is blank. No square wave.

Sorry Alec I don't know what you mean by that. I have no formal education
in electronics since high school back in the ice age. I have a business degree
so most of what I know about electronics is from internet research.
M.

 

Try adding a voltage source, with its voltage set to 5v, its - terminal to ground and its + terminal to the circuit node labelled Vdd.

 

Well, the Bordodynov circuit is missing symbols for CD4060B and xtal2.

 

Hi @maker_2023
This is what I have got so far.
Using your Draft and selecting the lower 3.2678MHz Xtal from the list.
A little slow at first then OK.

I know it is not 32Khz but is just a quick test of the Xtal with the CD4060
E

 

Hi maker,
Note the frequency check on the waveform plot
E

 

Neither of these simulations work. I must be missing something.

Thanks,
M

It works very well:

 

Hi Danko,
I would like to try your LTS asc, please post a copy.
E

 

Hi Danko,
I would like to try your LTS asc, please post a copy.
E

Hi Eric,
I simulated this @Bordodynov's file:
https://forum.allaboutcircuits.com/attachments/draft1-asc.313691/

 

h Danko
Success many thanks
E

 

hi maker,
The Xtal circuit works for OK for me, but very slow.
E
Have you tried the link that Danko posted?

 

hi maker,
The Xtal circuit works for OK for me, but very slow.
E
Have you tried the link that Danko posted?

Hi E:

Yes, I tried it but it freezes at 26.62ms and 1.3% complete. The
speed keeps changing but nothing else. So I say that it freezes.
My computer is an Intel Core i7 and its only 2 years old so I
wouldn't think that that would be a problem.

What I can't wrap my head around, is if I have the same file
why it doesn't work for me?

There is also a post with some hierarchical something or other
but I haven't tried that.

This is what I tried running.

M

 

Hi Guys:

Yes, I tried it but it freezes at 138.107ms and 6.9% complete. The
speed keeps changing but nothing else. So I say that it freezes.
My computer is an Intel Core i7 and its only 2 years old so I
wouldn't think that that would be a problem.

Note the status bar. I can't understand why it isn't working. What have you
guys got for settings in the Component Attribute Editor?
Here is the latest fail. You may have guessed, I don't give up easily
M

 

hi maker,
May I ask, is the purpose of this thread topic is to simply create a LTSpice working simulation of the crystal oscillator using a CD4046 or do you intend building an actual circuit.?

E

 

hi maker,
May I ask, is the purpose of this thread topic is to simply create a LTSpice working simulation of the crystal oscillator using a CD4046 or do you intend building an actual circuit.?

E

Hi E:

I intend to build an actual circuit but I like to simulate circuits before building them. Thanks for all
your help. I finally found that if I prevented my display from going to sleep, the sim would not freeze.
The problem is that after running it for 12 hours, it was only 46% done. It really isn't worthwhile.

M.

 

Hi maker,
I ran it for about 35 minutes this morning, then I just gave up.!

I have previously built this type of circuit to give 2Hz, then divided that by 2 to give a 1Sec pulse period.

What's your Plan B on this project?
E

 

Hi maker,
I ran it for about 35 minutes this morning, then I just gave up.!

I have previously built this type of circuit to give 2Hz, then divided that by 2 to give a 1Sec pulse period.

What's your Plan B on this project?
E

Hi Eric:

Well I don't really have a plan B at this point. I am going to breadboard the circuit that we have been
simulating to see how it works in the real world. If it works well...great. I had originally picked up a 10 Mhz
oscillator module but then I found out that CD4000 series might not like a 10Mhz clock. Some where along
the way I read that the higher clock rate the better because when you divide it down it makes the error
smaller and smaller. Which I thought made sense but then counters have a maximum frequency range
to consider.

M

 

Hi maker,
If you could get hold of a 74HCT192, you could divide the 10MHz osc frequency down to 1Mhz, more CD400 logic friendly.
E

 

Hi maker,
If you could get hold of a 74HCT192, you could divide the 10MHz osc frequency down to 1Mhz, more CD4000 logic friendly.
E

OK. Thanks. I will grab one of those 74HCT192 chips.
M