High-Q MOS Varactor Models for Quasi-Millimeter-Wave Low-Noise LC-VCOs

Itano, Yuka; Shotaro, Morimoto; Yoshitomi, Sadayuki

doi:10.1587/transfun.e97.a.759

Cited by 2 publications

(1 citation statement)

References 14 publications

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“…However, the most serious problem for Q factor degradation in K-and Ka-bands is caused by Q C degradation. In this respect, we focused on an investigation of Q C of the varactor, and it was improved sevenfold at f = 20 GHz in [12]. This improvement in Q C provided a significant advantage for improving Q tank .…”

Section: Introductionmentioning

confidence: 99%

A Study of Striped Inductor for K- and Ka-Band Voltage-Controlled Oscillators

Tsuji

Itano

Morishita

et al. 2016

IEICE Trans. Electron.

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SUMMARYA striped inductor and its utilization of a voltagecontrolled oscillator (VCO) are studied with the aim of suppressing phase noise degradation in K-and Ka-bands. The proposed striped inductor exhibits reduced series resistance in the high frequency region by increasing the cross-sectional peripheral length, as with the Litz wire, and the VCO of the striped inductor simultaneously exhibits a lower phase noise than that of the conventional inductor. Striped and conventional inductors and VCOs are designed and fabricated, and their use of K-and Ka-bands is measured. Results show that the Q factor and corner frequency of the striped inductor are approximately 1.3 and 1.6 times higher, respectively, than that of the conventional inductor. Moreover, the 1-MHz-offset phase noise of the striped inductor's VCO in the K-and Ka-bands was approximately 3.5 dB lower than that of the conventional inductor. In this study, a 65-nm standard CMOS process was used. key words: skin effect, striped inductor, Q factor, corner frequency, voltage-controlled oscillator, phase noise

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Section: Introductionmentioning

confidence: 99%