Circuit from quartz crystal to CRYSTAL CLOCK OSCILLATOR

[suribright]

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]

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.

 

[suribright]

Thanks, E-design. This circuit cannot get a perfect rectangle wave. Do you have a circuit with rectangle wave ?

 

[E-design]

Do you need 50% duty cycle output?

**broken link removed**

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.