A 37.5–45 GHz Superharmonic-Coupled QVCO With Tunable Phase Accuracy in 28 nm CMOS

Autor:	Nai-Chung Kuo, Luya Zhang, Ali M. Niknejad
Rok vydání:	2019
Předmět:	Coupling Physics Harmonic analysis Subharmonic function Offset (computer science) CMOS business.industry Phase noise Optoelectronics dBc Electrical and Electronic Engineering business Electrical impedance
Zdroj:	IEEE Journal of Solid-State Circuits. 54:2754-2764
ISSN:	1558-173X 0018-9200
DOI:	10.1109/jssc.2019.2915617
Popis:	This paper presents a new superharmonic coupling structure for millimeter-wave (mmW) quadrature voltage-controlled oscillators (QVCOs) with high phase accuracy and zero voltage headroom. The proposed coupling network can adjust the quadrature error with almost no phase noise penalty. A tail impedance theory for superharmonically coupled oscillators is introduced to analyze the locking mechanism, phase noise, phase accuracy, and phase tunability of the proposed superharmonic QVCO. For verification, a 40 GHz QVCO is fabricated in a 28 nm bulk CMOS process, which exhibits a phase noise of −94.32 dBc/Hz at 1 MHz offset and 0.18° quadrature error with 8.4 mW power consumption and 18.4% frequency tuning range.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::2f40cc4a110b04ce40646295d9b498ef https://doi.org/10.1109/jssc.2019.2915617 Zobrazit plný text záznamu