Abstract
A BAW based parallel resonance oscillator employing cross-coupled complementary structure is presented for applications requiring ultra-low power consumption and good phase noise performance. Compared to the differential NMOS structure, this circuit offers about 50% reduction in power consumption along with a significant improvement in the thermal noise performance. By the use of proper design considerations, the flicker noise behavior can be optimized. The power consumption in the case of such an oscillator (designed in CMOS 180 nm process) employing a 2.497 GHz BAW resonator is around 675μW for an amplitude of 300 mV with a phase noise of −140dBc/Hz at 1 MHz offset.
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