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A Single-Chip 125-MHz to 32-GHz Signal Source in 0.18- \mu m SiGe BiCMOS

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8 Author(s)
Shih-An Yu ; Dept. of Electr. Eng., Columbia Univ., New York, NY, USA ; Baeyens, Y. ; Weiner, J. ; Koc, U.-V.
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We present a 4.4-mm2 single-chip synthesized signal source with 125 MHz to 32 GHz continuous frequency coverage with a minimum frequency step smaller than 10 Hz. The chip is fabricated in a 0.18-μm SiGe BiCMOS 1P6M technology. A core fractional-N synthesizer using a 20-MHz reference frequency has four LC-VCOs and a 4- to 8-GHz synthesizable range. Post-synthesis blocks extend the frequency coverage up to 32 GHz and down to 125 MHz through frequency multiplication and division. In different operation modes, the chip, including a balanced 50-ohm load driver, consumes from 284 to 498 mW. The phase noise performance achieves -117.6 dBc/Hz at 1-MHz offset from a 6-GHz output frequency and -83 dBc/Hz in-band noise. The integrated phase noise is -28 dBc and the absolute jitter is 1.05 psRMS at 6-GHz output. The jitter is maintained nearly constant (between 0.9 and 1.2 psRMS) across the whole output frequency range.

Published in:

Solid-State Circuits, IEEE Journal of  (Volume:46 ,  Issue: 3 )

Date of Publication:

March 2011

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