The LOW POWER CRYSTAL OSCILLATOR shown here reduces power consumption of a Pierce oscillator which has an inverter preferably made of an NFET N0 and a PFET P0 in series. A load, preferably an NFET N1 with its gate wired to its source, is placed in parallel with a switch, preferably a PFET P1, between...http://www.google.com/patents/US5486795?utm_source=gb-gplus-sharePatent US5486795 - Low power crystal oscillator
