Low phase noise, FBAR-based voltage controlled oscillator without varactor

@article{Kim2005LowPN,
  title={Low phase noise, FBAR-based voltage controlled oscillator without varactor},
  author={Jong-jin Kim and Hao Zhang and Wei Wang Pang and Hongyu Yu and Eun Sok Kim},
  journal={The 13th International Conference on Solid-State Sensors, Actuators and Microsystems, 2005. Digest of Technical Papers. TRANSDUCERS '05.},
  year={2005},
  volume={1},
  pages={1063-1066 Vol. 1}
}
A Colpitts voltage controlled oscillator (VCO) at 1.1 GHz is designed with a film bulk acoustic resonator (FBAR) as the frequency control element. The oscillator achieves an extremely low phase noise of -115 dBc/Hz at 10 kHz offset, which is 19 dB better than that of an LC oscillator. Voltage control of the oscillation frequency is obtained by applying a DC voltage on the FBAR, unlike a conventional VCO that uses a PN junction varactor (a significant noise contributor) to vary the oscillation… CONTINUE READING

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A 2 GHz oscillator using a monolithically integrated AlN TFBAR

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