a diagram of a for a simple phase oscillator that has 3 capacitors, 3 rresistors and a transistor in a phase shift oscillator

 

This page has quite a number of oscillator design links:
http://www.educypedia.be/electronics/analogosciltypes.htm

This is the one you're looking for:
http://www.visionics.ee/curriculum/...ft Oscillator/RC Phase Shift Oscillator1.html

Just scroll down past the advertisement for the SmartTweezers. (Had one of those at work a few years ago - it wasn't accurate enough for our purposes.)

 

If you go to Linear Technology's website, you can download LTSpice/SwitcherCad III for free.

In the examples, there is "phaseshift.asc" - it is a somewhat more simple phaseshift oscillator, using a similar concept.