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A Temperature-Stable Film Bulk Acoustic Wave Oscillator

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6 Author(s)
Wei Pang ; Avago Technol., Inc., San Jose ; Ruby, R.C. ; Parker, R. ; Fisher, P.W.
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This letter reports a passively temperature-compensated CMOS oscillator utilizing a film bulk acoustic resonator. The resonator exhibiting an f ldr Q product of 2-4 X 1012 s-1 is composed of molybdenum, aluminum nitride, and a compensation material that has a positive temperature coefficient of Young's modulus. The 604-MHz oscillator consumes 5.3 mW from a 3.3-V supply and achieves excellent phase noise performances of -102, -130, and -149 dBc/Hz at 1, 10, and 100 kHz carrier offsets, respectively. The oscillator's temperature-dependent frequency drift is less than 80 ppm over a temperature range of -35degC to +85degC.

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Electron Device Letters, IEEE  (Volume:29 ,  Issue: 4 )