{"title":"A 9.3MHz to 5.7GHz tunable LC-based VCO using a divide-by-N injection-locked frequency divider","authors":"Shoichi Hara, K. Okada, A. Matsuzawa","doi":"10.1109/ASSCC.2009.5357184","DOIUrl":null,"url":null,"abstract":"This paper proposes a novel wideband voltage-controlled oscillator (VCO) for multi-band transceivers. The proposed oscillator has a core VCO and a tuning-range extension circuit, which consists of an injection-locked frequency divider (ILFD), and flip flop dividers. The 2-stage differential ILFD can generate quadrature outputs, and it realizes 2, 3, 4, and 6 of divide ratio with very wide output frequency range. The proposed circuit is implemented by using a 90nm CMOS process, and the chip area is 250μm × 200 μm. The measured results achieves 9.3 MHz-to-5.7 GHz (199%) of continuous frequency tuning range with −210 dBc/Hz of FoMT.","PeriodicalId":263023,"journal":{"name":"2009 IEEE Asian Solid-State Circuits Conference","volume":"30 1","pages":"0"},"PeriodicalIF":0.0000,"publicationDate":"2009-12-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"19","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"2009 IEEE Asian Solid-State Circuits Conference","FirstCategoryId":"1085","ListUrlMain":"https://doi.org/10.1109/ASSCC.2009.5357184","RegionNum":0,"RegionCategory":null,"ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"","JCRName":"","Score":null,"Total":0}
引用次数: 19
Abstract
This paper proposes a novel wideband voltage-controlled oscillator (VCO) for multi-band transceivers. The proposed oscillator has a core VCO and a tuning-range extension circuit, which consists of an injection-locked frequency divider (ILFD), and flip flop dividers. The 2-stage differential ILFD can generate quadrature outputs, and it realizes 2, 3, 4, and 6 of divide ratio with very wide output frequency range. The proposed circuit is implemented by using a 90nm CMOS process, and the chip area is 250μm × 200 μm. The measured results achieves 9.3 MHz-to-5.7 GHz (199%) of continuous frequency tuning range with −210 dBc/Hz of FoMT.