A Transformer-Based Dual-Coupled Triple-Mode CMOS LC-VCO

Autor:	Xiaohua Yu, Amany El-Gouhary, Nathan M. Neihart
Rok vydání:	2014
Předmět:	Radiation Materials science business.industry Transconductance Electrical engineering dBc Biasing Condensed Matter Physics law.invention Voltage-controlled oscillator CMOS law Phase noise Optoelectronics Electrical and Electronic Engineering business Transformer Electrical impedance
Zdroj:	IEEE Transactions on Microwave Theory and Techniques. 62:2059-2070
ISSN:	1557-9670 0018-9480
DOI:	10.1109/tmtt.2014.2332498
Popis:	This paper introduces a transformer-based, dual-coupled, triple-mode voltage-controlled oscillator (VCO) using a transformer-based fourth-order tank with tunable transconductance feedback between the primary and secondary coils. The tank impedance can be reshaped by the transconductors through the tuning of their biasing currents. By controlling the bias currents, the VCO has three different operational modes, capable of generating a single frequency in either the 3- or 5-GHz band as well as two frequencies in the 3- and 5-GHz bands simultaneously. The measured phase noise at 1-MHz offset frequency is -109.5 and -118.8 dBc/Hz when the oscillator oscillates at a single frequency of 5.24 or 3.22 GHz, respectively. The phase noise is -104.3 and -112.6 dBc/Hz, respectively, when the oscillator oscillates at 5.34 and 3.03 GHz simultaneously. The triple-mode VCO was fabricated in a 0.13- μm CMOS process, occupies a core area of 0.16 mm 2 , and dissipates 5.6 mW from a 1.2-V supply.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::12b9fa46888e7a4bf886e60eaa900e65 https://doi.org/10.1109/tmtt.2014.2332498 Zobrazit plný text záznamu