A 28.5-32-GHz Fast Settling Multichannel PLL Synthesizer for 60-GHz WPAN Radio
A 28.5-32-GHz fast settling multichannel frequency synthesizer is implemented in 0.25-mum SiGe : C BiCMOS process technology for 60-GHz wireless personal area network (WPAN) applications. The phase-locked loop (PLL) synthesizes carrier frequencies between 28.5-32 GHz in step of 500 MHz, and settles...
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Veröffentlicht in: | IEEE transactions on microwave theory and techniques 2008-05, Vol.56 (5), p.1234-1246 |
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Sprache: | eng |
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Zusammenfassung: | A 28.5-32-GHz fast settling multichannel frequency synthesizer is implemented in 0.25-mum SiGe : C BiCMOS process technology for 60-GHz wireless personal area network (WPAN) applications. The phase-locked loop (PLL) synthesizes carrier frequencies between 28.5-32 GHz in step of 500 MHz, and settles in approximately 327 ns. The proposed PLL can be employed as a frequency source providing eight channels of frequency hopping carriers for 60-GHz WPAN radio. To generate eight channels of carriers, an integer- N PLL with 125-MHz reference frequency is implemented, and a programmable divider with all differential current-steering circuits is designed. The programmable divider reliably provides divide ratios of 114-128 at 15 GHz. To achieve eight channels of carriers at a challenging frequency of 30 GHz, a push-push voltage-controlled oscillator is employed using a Wilkinson power combiner. The PLL consumes 115 mA at 2.5 V and achieves phase noise of -81 dBc/Hz at 1-MHz offset measured from 32-GHz push-push carrier. |
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ISSN: | 0018-9480 1557-9670 |
DOI: | 10.1109/TMTT.2008.920179 |