A low noise 1.5GHz VCO with a 3.75% tuning range using coupled FBAR's

We present the first IC oscillator using acoustically coupled FBAR's with a 3.75% tuning range. The tuning range is higher than previous low-power FBAR oscillators and wide enough to cover the individual ISM bands. The high Q of the resonator enables to achieve a phase noise of -144.35dBc/Hz at...

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Bibliographic Details
Main Authors: Nagaraju, Manohar B., Sankaragomathi, Kannan A., Gilbert, Stephen R., Otis, Brian P., Ruby, Richard C.
Format: Conference Proceeding
Language:English
Subjects:
CMOS integrated circuits
Film bulk acoustic resonators
Impedance
Phase noise
Tuning
Voltage-controlled oscillators
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Summary:We present the first IC oscillator using acoustically coupled FBAR's with a 3.75% tuning range. The tuning range is higher than previous low-power FBAR oscillators and wide enough to cover the individual ISM bands. The high Q of the resonator enables to achieve a phase noise of -144.35dBc/Hz at 1MHz offset with a carrier frequency of 1.55GHz and a power consumption of 11.7mW. The miniaturized coupled FBAR die is (500×540)μm 2 . The active area of the CMOS is (600x550)μm 2 .
ISSN:1051-0117
DOI:10.1109/ULTSYM.2012.0550