A digitally compensated 1.5 GHz CMOS/FBAR frequency reference.
A temperature-compensated 1.5 GHz film bulk acoustic wave resonator (FBAR)-based frequency reference implemented in a 0.35 microm CMOS process is presented. The ultra-small form factor (0.79 mm x 1.72 mm) and low power dissipation (515 microA with 2 V supply) of a compensated FBAR oscillator present a promising alternative for the replacement of quartz crystal frequency references. The measured post-compensation frequency drift over a 0-100 degrees C temperature range is < +/- 10 ppm. The measured oscillator phase noise is -133 dBc/Hz at 100 kHz offset from the 1.5 GHz carrier.
Rai
Shailesh
S
Department of Electrical Engineering, University of Washington, Seattle, WA, USA. shailesh@u.washington.edu
Su
Ying
Y
Pang
Wei
W
Ruby
Richard
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Otis
Brian
B