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Low-noise high-resolution BAW-based high-frequency oscillator

Low-noise high-resolution BAW-based high-frequency oscillator

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Published

The design of a 500 MHz oscillator in a 65 nm CMOS process using a 2 GHz bulk acoustic wave (BAW) resonator is presented. A digital frequency control is implemented using a switched capacitor bank in parallel to the resonator. The tuning range is up to 500 kHz with a minimum step of 200 Hz. The oscillator core uses a differential topology and is designed for low phase noise (−128 dBc/Hz at 100 kHz offset) at low power consumption (0.9 mW). It is followed by a low-noise divider, which provides a 500 MHz output with a phase noise of −139 dBc/Hz at 100 kHz offset from the carrier.

Inspec keywords: CMOS integrated circuits; bulk acoustic wave devices; UHF oscillators; phase noise

Other keywords: switched capacitor bank; frequency 2 GHz; digital frequency control; bulk acoustic wave resonator; low phase noise; BAW-based high-frequency oscillator; low noise divider; UHF oscillator; frequency 500 MHz; size 65 nm; differential topology; CMOS process; low power consumption

Subjects: CMOS integrated circuits; Microwave circuits and devices; Oscillators

References

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      • S.S. Rai , B.P. Otis . A 600 µW BAW-tuned quadrature VCO using source degenerated coupling. IEEE J. Solid-State Circuits , 300 - 305
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    3. 3)
      • Vanhelmont, F.: `A 2 GHz reference oscillator incorporating a temperature compensated BAW resonator', IEEE Ultrasonics Symp., 2006, 2006, p. 333–336.
    4. 4)
      • Loebl, H.: `Narrow band bulk acoustic wave filters', IEEE Ultrasonics Symp., 2004, 1, p. 411–415.
    5. 5)
      • Razafimandimby, S.: `A 2 GHz 0.25 µm SiGe BiCMOS oscillator with flip-chip mounted BAW resonator', ISSCC Dig. Tech. l Papers, 2007, p. 580–623.
    6. 6)
      • Schmidhammer, E.: `High volume production of a fully matched 5050PCS-CDMA-BAW duplexer', IEEE Ultrasonics Symp., 2006, p. 329–332.
    7. 7)
      • Chabloz, J., Ruffieux, D., Vouilloz, A.: `Frequency synthesis for a low power 2.4 GHz receiver using a BAW oscillator and a relaxation oscillator', ESCIRC, September 2007, p. 492–495.
http://iet.metastore.ingenta.com/content/journals/10.1049/el.2009.1779
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