Problem With Quartz Crystal Simulation

Thread Starter

maker_2023

Joined Nov 20, 2023
167
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.
 

Alec_t

Joined Sep 17, 2013
14,327
Try adding a voltage source, with its voltage set to 5v, its - terminal to ground and its + terminal to the circuit node labelled Vdd.
 

ericgibbs

Joined Jan 29, 2010
18,862
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
EG57_ 1433.png
 

Attachments

Thread Starter

maker_2023

Joined Nov 20, 2023
167
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
 

Attachments

Last edited:

Thread Starter

maker_2023

Joined Nov 20, 2023
167
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

1706477636961.png
 
Last edited:

ericgibbs

Joined Jan 29, 2010
18,862
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
 

Thread Starter

maker_2023

Joined Nov 20, 2023
167
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.
 

ericgibbs

Joined Jan 29, 2010
18,862
Hi maker,
I ran it for about 35 minutes this morning, then I just gave up.!:rolleyes:

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
 

Thread Starter

maker_2023

Joined Nov 20, 2023
167
Hi maker,
I ran it for about 35 minutes this morning, then I just gave up.!:rolleyes:

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
 
Top