Crystal Oscillator CCT

Does anyone know of a link or a schematic that outlines how to use a standard two lead crystal, to build a oscillator out of?

I have found schematics that require negative voltages on an op-amp, however, i would like to try and keep the cct design voltages at +9V and 0V (and regulated 5V).

Thanks in advanced.
NaN

with transistors:
**broken link removed**
http://hem.passagen.se/communication/txo.html
standard logic chips:
http://www.geocities.com/SiliconValley/Peaks/3938/uexosc.htm
nice tutorial:
http://www.electronics-tutorials.com/oscillators/oscillators.htm
regards :wink:

Thanx, the 74LS00 cct did the trick.. nice and simple, and didnt need to buy more parts

Thanx again!
NaN