Temperature Compensated BAW Resonator and its integrated Thermistor for a 2.5GHz Electrical Thermally Compensated Oscillator

摘要

This paper presents a miniaturized 2.5GHz frequency source based on compensated BAW resonator with its integrated temperature molybdenum sensor assembled on the differential Colpitts oscillator. The presence of silicon dioxide layer having a positive temperature coefficient compared to other layers is used to reduce the resonator's drift. A demonstration oscillator achieves a frequency drift of 40ppm over a temperature range from -35°C to +85°C. The oscillator's phase noise of -113dBc/Hz at 10kHz offset from the carrier is reported at 2.5GHz.