Open Access2.49–4.91 GHz wideband VCO with optimised 8‐shaped inductor
Author(s) -
Zou Wei,
Zou Xuecheng,
Ren Daming,
Zhang Kefeng,
Liu Dongsheng,
Ren Zhixiong
Publication year - 2019
Publication title -
electronics letters
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.375
H-Index - 146
eISSN - 1350-911X
pISSN - 0013-5194
DOI - 10.1049/el.2018.6012
Subject(s) - voltage controlled oscillator , dbc , wideband , phase noise , inductor , offset (computer science) , cmos , electrical engineering , materials science , electronic engineering , engineering , computer science , voltage , programming language
A wideband low‐phase noise VCO is proposed for multi‐standard wireless communication system. An 8‐shaped high‐Q inductor is employed to enhance the performance of the VCO. The frequency pulling is reduced by using the 8‐shaped coil. Implemented in a 180 nm CMOS process, the VCO can provide a very wide tuning range of 65.4% from 2.49 to 4.91 GHz. A phase noise lower than −121.25 dBc/Hz is obtained at 1 MHz offset over the whole working band while the current consumed varies from 3.5 to 8.7 mA.