A waveform-shaping millimeter-wave oscillator with 184.7dBc/Hz FOM in 40nm digital CMOS process
|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||Online since:||2015-12-14T15:52:45Z||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 capacitor; Digitally-controlled oscillator (DCO); Multi-stage broadside-coupled transformer (MSBCT); Waveform-shaping; Millimeter-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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