V-band low phase noise QVCO in 90nm CMOS technology using a gate-connected tank

R. Banin, O. Degani, E. Socher

Research output: Contribution to journalArticlepeer-review

Abstract

A quadrature voltage controlled oscillator (QVCO) with -111 dBc/Hz average phase noise at 1MHz offset across an output frequency range of 48.9-50.3GHz is presented. The design employs a modification of the Armstrong technique of using a transformer in the LC tank to improve the phase noise by reducing the single-ended component of the tank capacitance in a differential cross-coupled design and by separating the gate and drain transistor bias. Tuning is achieved by an accumulation MOS varactor and a thermometer-coded bank of 14 switched capacitors. The design consumes 23mA from a 1.3 V supply and occupies an area of 0.25mm 2 in 90nm CMOS technology.

Original languageEnglish
Pages (from-to)1046-1048
Number of pages3
JournalElectronics Letters
Volume48
Issue number17
DOIs
StatePublished - 16 Aug 2012

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