Multisim - 4060N isn't oscillating

If i connect function generator to test the oscillation everything works OK but if i connect 3mhz osc to pin 10 and 11 of 4060 there's no signal. According to datasheet 10 and 11 are input pins for osc and they are connected with MOhm resistor. Btw this is working in "real" pcb.

Can someone check if this part is working.
I tested it on new design and on original schematics.

Maybe i need to set some instructions to quartz osc ?.. Just guessing .

Huby

 

I will pass whole schematics.
There should be signal on IGBT's but there's none so i was testing on 4060N.

I tested few options ( maybe the last one is wrong ) and this one should work according to datasheet.

10 , 11 --> to osc
12 --> gnd
16 -->vss ( 12V )
OSC = 3mhz - quarz
---------------------
Output should be 200hz.
Final goal is to get signal / impuls on TC4220.

Huby

 

Pin 8 and pin 16 are automaticly set and you can not change them.
Ok, you can set different voltage to pin 16.
Pin 16 is by default VDD and 8 is VSS also by default.
They are both hidden pins and i can not "edit " them.

I dont understand you why should i need 15pF cap ?
If this is really neccessery, i can not set it because pin 8 is "blocked" for editing.

Please look at multisim test schematics ( this is just one of the tests ).

http://oi50.tinypic.com/z669z.jpg

Huby

 

I try it just now.
It the same as before....
Can you test it ?

 

Well, this is newest situation.
I change to the 4060BT ( not BD ) 15V and i test it on separate design. It works as it should.
Then i put the same part into my existing schematics and, you guess it... it doesn't work. To be more precise, it starts to oscillate but there is no signal. I disconnected it from 4040 and i test it alone ( on whole schematics ) and the situation is the same. It starts to oscillate but there no signal. I also try with capacitors to gnd, but nothing.

Is this kind of schematics to heavy for multisim ?
If so, then where can i find some better program to simulate my schematics ?

Huby

 

I simulated your circuit on the 4060 on proteus and it also doesn't work. It works if I inject the 3 Mhz pulses directly onto the pin.

I also dont know the reason why..... But in the past I have simulated 2 transistors connected as a multi-vibrating oscillator and it didnt work as well.

Have you tried it on LTSpice IV yet? I guess some circuits are difficult to simulate and have to be tested on real hardware....

Allen

 

I was thinking how should this work in isis but as you pointed out, it would not work.

It works if I inject the 3 Mhz pulses directly onto the pin.
** Over function generator or ?

Can you please test my whole schematics on this way.
I will do the same...

I was working with ltspice before but i didn't use it on this schematics.
Did you use LTspice for such projects and if you did can you compare it to multisim ( on efficiency level )

Huby
p.s. whole schematics is few post up and you have to move osc connection to pin 11 ( my mistake ).

 

Any luck with testing the schematics ?

Huby

 

It only works in the way as attached in ISIS....

And I can only get it to work down to 1 MHz clock.

I seldom use LTSpice but it was good for transporting design amongst the members here and other groups. My LTSpice also dont have 4060 on my '4000 cmos library". I've never used multisim as well.

Allen

 

You connected just to rtc ?
Dont you need pin 10,11 and resistor?

I will try it today....