A 2.7V, 5.2GHz frequency synthesizer with 1/2 - Subharmonically injection-locked distributed voltage controlled oscillator

Research output: Journal Publications and Reviews (RGC: 21, 22, 62)21_Publication in refereed journalpeer-review

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Original languageEnglish
Pages (from-to)1237-1243
Journal / PublicationIEEE Transactions on Consumer Electronics
Issue number4
Publication statusPublished - Nov 2004


A 2.7 volt, 5.2GHz frequency synthesizer has been implemented. A phase locked loop simultaneously controls the oscillation frequency of both the 2.6GHz injection source and the 5.2GHz distributed voltage controlled oscillator. The intrinsic frequency mismatch between the 2.6GHz voltage controlled oscillator and the 5.2GHz distributed voltage controlled oscillator is resolved by performing 1/2-subharmonically injection locking on a 5.2GHz distributed voltage controlled oscillator. The locking range due to various injection powers and harmonic levels are measured. Investigation on the locking characteristic shows that the locking range is not only affected by the fundamental of the injected signal, but also strongly dependent on the magnitude of the second harmonic of the injected signal. The findings provide insight for the design of wide locking range synthesizer. The developed low-voltage frequency synthesizer caters for wireless LAN applications. With slight modifications, the oscillator can be applied to ASIC design. © 2004 IEEE.

Research Area(s)

  • Frequency synthesizers, Injection locking, Phase locked loop, VCOs, Voltage controlled oscillators