Switched-inductor VCO based on tapped vertical solenoid inductors

Author

Wanghui Zou ; Xiaofei Chen ; Kui Dai ; Xuecheng Zou

Author_Institution

Res. Centre for VLSI Circuits & Syst., Huazhong Univ. of Sci. & Technol., Wuhan, China

Volume

48

Issue

9

fYear

2012

Firstpage

509

Lastpage

511

Abstract

A new switched-inductor voltage controlled oscillator (VCO) scheme based on tapped vertical solenoid inductors is presented. With tapping ports, various effective inductances are selected by switches for multi-band operation. As a proof of concept, two VCOs, with one and two tapping ports separately, are implemented in a 0.18 m 1P6M standard CMOS. Because of the vertical structure of the inductors, the new scheme consumes much less area than the conventional switch-inductor VCOs. The measured frequency bands of the VCOs are located between 1.96 and 3.49 GHz, and the measured phase noise at 1 MHz offset is between 115.4 and 118.5 dBc/Hz across all bands under power consumption of 14.4 mW (8 mA, 1.8 V).

Keywords

CMOS analogue integrated circuits; UHF integrated circuits; UHF oscillators; inductors; microwave integrated circuits; microwave oscillators; voltage-controlled oscillators; 1P6M standard CMOS; current 8 mA; frequency 1 MHz; multiband operation; power 14.4 mW; switched-inductor VCO; tapped vertical solenoid inductors; vertical structure; voltage 1.8 V; voltage controlled oscillator scheme;

fLanguage

English

Journal_Title

Electronics Letters

Publisher

iet

ISSN

0013-5194

Type

jour

DOI

10.1049/el.2012.0341

Filename

6190840