Welcome to EDAboard.com

Welcome to our site! EDAboard.com is an international Electronic Discussion Forum focused on EDA software, circuits, schematics, books, theory, papers, asic, pld, 8051, DSP, Network, RF, Analog Design, PCB, Service Manuals... and a whole lot more! To participate you need to register. Registration is free. Click here to register now.

Register Log in

Circuit from quartz crystal to CRYSTAL CLOCK OSCILLATOR

Status
Not open for further replies.

suribright

Member level 2
Joined
Oct 6, 2011
Messages
42
Helped
0
Reputation
0
Reaction score
0
Trophy points
1,286
Activity points
1,576
Hi,
By mistaking, I have ordered a QUARTZ CRYSTAL, 13.56 MHz, 18pF. Has any one know a circuit creating a 13.56 Mhz crystal oscillator from above crystal?
Thanks
 

E-design

Advanced Member level 5
Joined
Jun 1, 2002
Messages
2,014
Helped
507
Reputation
1,016
Reaction score
407
Trophy points
1,363
Activity points
14,195
You can use this circuit. Here it is shown working with a 14.7MHz crystal. It should work with your crystal without any problem.
It can drive 5V logic directly with the values shown. C3 can be made variable to calibrate exact frequency.
 

Attachments

Last edited:

suribright

Member level 2
Joined
Oct 6, 2011
Messages
42
Helped
0
Reputation
0
Reaction score
0
Trophy points
1,286
Activity points
1,576
Thanks, E-design. This circuit cannot get a perfect rectangle wave. Do you have a circuit with rectangle wave ?
 

E-design

Advanced Member level 5
Joined
Jun 1, 2002
Messages
2,014
Helped
507
Reputation
1,016
Reaction score
407
Trophy points
1,363
Activity points
14,195
Do you need 50% duty cycle output?

http://www.omnirep.se/drm/frg-7700.html

You can use a 4060 chip connected as shown, using your crystal. The X1 output can be obtained from pin 9.
The only drawback is that you need to run the chip at voltages around 10V for it to be able to oscillate at this frequency.
 
Last edited:

Status
Not open for further replies.

Part and Inventory Search

Welcome to EDABoard.com

Sponsor

Top