Sonsivri
 
*
Welcome, Guest. Please login or register.
Did you miss your activation email?
December 05, 2016, 05:24:39 05:24


Login with username, password and session length


Pages: [1]
Print
Author Topic: OrCAD simulation with crystal  (Read 6116 times)
0 Members and 1 Guest are viewing this topic.
diamadiss
Junior Member
**
 Muted
Offline Offline

Posts: 69

Thank You
-Given: 202
-Receive: 4



« on: November 15, 2009, 09:02:04 21:02 »

Hello. I want a help with OrCAD. I try to simylate the circuit with crystal i picture. The problem is that give error in simulation with crystal. Also i want to use cstal with frequency 2MHz and i didn't found. If use crystal from wrong library. If anyone can help me. Thanks!

Picture :
http://img17.imageshack.us/img17/1503/sdfsf313dsfs230.jpg

Sircuit Project :
http://rapidshare.com/files/307506832/353313fd2h3dh3d.rar.html
Logged
manish12
Active Member
***
 Muted
Offline Offline

Posts: 164

Thank You
-Given: 44
-Receive: 39


« Reply #1 on: November 16, 2009, 08:23:53 08:23 »

if it is osci ,then no need of xtal there , just try to get wave ?? first ,then try to stabilize using xtal ,hope you need more time to get it work .
Logged
diamadiss
Junior Member
**
 Muted
Offline Offline

Posts: 69

Thank You
-Given: 202
-Receive: 4



« Reply #2 on: November 16, 2009, 09:11:10 09:11 »

Without xtal doesen't work. Thanks.
Logged
FriskyFerret
Hero Member
*****
Offline Offline

Posts: 564

Thank You
-Given: 513
-Receive: 358


Put it in, take it out.


WWW
« Reply #3 on: November 16, 2009, 06:21:22 18:21 »

Is that crystal part in OrCAD even have a SPICE model connected to it?

With a crystal you can break it into its equivalent components parts: capacitance, resistance and inductance. You create a tank circuit this way and then try to make it oscillate at its fundamental frequency in SPICE. (Good luck)

Crystals are very simple physically but very complicated to understand and model. Remember they are electro-MECHANICAL devices with very peculiar properties.


Logged

Dancing pants and leotards, that's what I'm talkin' about!
diamadiss
Junior Member
**
 Muted
Offline Offline

Posts: 69

Thank You
-Given: 202
-Receive: 4



« Reply #4 on: November 16, 2009, 07:21:19 19:21 »

I make an equal crystal circuit who is in picture but doesent't work correct. I didn't have Vout ~ 25Vp-p and i didn't have fr 2MHz. Thanks but everybody for answers. Regards Diamadiss. Smiley

http://img4.imageshack.us/i/dfgdg53662.jpg/
Logged
FriskyFerret
Hero Member
*****
Offline Offline

Posts: 564

Thank You
-Given: 513
-Receive: 358


Put it in, take it out.


WWW
« Reply #5 on: November 17, 2009, 07:41:51 19:41 »

Once you have a model that might work, then you have to persuade it to start oscillating. There are various ways to make the circuit start.

You are swimming into very deep SPICE waters.
Logged

Dancing pants and leotards, that's what I'm talkin' about!
diamadiss
Junior Member
**
 Muted
Offline Offline

Posts: 69

Thank You
-Given: 202
-Receive: 4



« Reply #6 on: November 17, 2009, 10:26:07 22:26 »

I know that circuits with crystal is very complicated, but i want to make that circuit work. If anyone can do it i would appreciate that. Thanks for the intrest. Smiley
Logged
aamir
Hero Member
*****
 Muted
Offline Offline

Posts: 510

Thank You
-Given: 37
-Receive: 229


« Reply #7 on: November 18, 2009, 05:59:38 05:59 »

downloads following files it contains example dsn with simulation
http://ee.uttyler.edu/David_Beams/Projects/pspice%20archives/PSpice%20Archives.htm

flowing links might works
http://www.orcad.com/forums/ShowPost.aspx?PostID=6777
http://pstca.com/spice/xtal/clapp.htm
http://www.freelists.org/post/si-list/Crystal-oscillator-simulation-in-time-domain-by-Pspice,5
http://www.edn.com/article/CA45903.html
« Last Edit: November 18, 2009, 07:42:31 07:42 by aamir » Logged
FriskyFerret
Hero Member
*****
Offline Offline

Posts: 564

Thank You
-Given: 513
-Receive: 358


Put it in, take it out.


WWW
« Reply #8 on: November 19, 2009, 07:30:42 19:30 »

Kinda tight with the 'Thank You' button aren'tcha, diamadiss? Twenty five posts and every one except one is an 'I want' post.
Logged

Dancing pants and leotards, that's what I'm talkin' about!
Pages: [1]
Print
Jump to:  


DISCLAIMER
WE DONT HOST ANY ILLEGAL FILES ON THE SERVER
USE CONTACT US TO REPORT ILLEGAL FILES
ADMINISTRATORS CANNOT BE HELD RESPONSIBLE FOR USERS POSTS AND LINKS

... Copyright 2003-2999 Sonsivri.to ...
Powered by SMF 1.1.18 | SMF © 2006-2009, Simple Machines LLC | HarzeM Dilber MC