A waveform-shaping millimeter-wave oscillator with 184.7dBc/Hz FOM in 40nm digital CMOS process

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Title: A waveform-shaping millimeter-wave oscillator with 184.7dBc/Hz FOM in 40nm digital CMOS process
Authors: Luo, Xun
Qian, Huizhen Jenny
Staszewski, Robert Bogdan
Permanent link: http://hdl.handle.net/10197/7305
Date: 22-May-2015
Abstract: In this paper, a topology for millimeter-wave (mm­ wave) oscillator with a waveform-shaping operation is proposed with improved phase-noise. The 3rd harmonic enhancement for enforcing a pseudo-square voltage waveform and adjustable tuning-banks for wide tuning range are simultaneously achieved, based on a multi-stage broadside-coupled transformer (MSBCT) with recon gurable coupling factors at mm-wave. Meanwhile, to meet the high-Q, high-resolution, and metal density limits, a novel 3D self-shielded capacitor is developed for implementation of tuning-banks operating at mm-wave. To verify the mechanism of the structures above, a waveform-shaping mm-wave digitally­ controlled oscillator (DCO) is fabricated. The proposed oscillator has a state-of-the-art gure-of-merit (FoM) of 184.7dBcIHz at 58.1 GHz under 110°C, despite being realized in a digital CMOS 40nm process without customary ultra-thick metal option. The resolution for this DCO is about 2.5MHz within the whole tuning range. The chip core size is 315um by llOum.Index Terms-3D self-shielded capacitor, digitally-controlled oscillator (DCO), multi-stage broadside-coupled transformer (MSBCT), waveform-shaping, millimeter-wave (mm-wave).
Type of material: Conference Publication
Publisher: IEEE
Copyright (published version): 2015 IEEE
Keywords: 3D self-shielded capacitorDigitally-controlled oscillator (DCO)Multi-stage broadside-coupled transformer (MSBCT)Waveform-shapingMillimeter-wave (mm-wave)
DOI: 10.1109/MWSYM.2015.7167075
Language: en
Status of Item: Peer reviewed
Is part of: Procedings of IEEE MTT-S International Microwave Symposium (IMS) 2015
Conference Details: IEEE MTT-S International Microwave Symposium (IMS), Phoenix, Arizona, USA, 17 - 22 May 2015
ISBN: 978-1-4799-8275-2/15
Appears in Collections:Electrical and Electronic Engineering Research Collection

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