A 2.15–6.18 GHz transformer-based dual-mode LC-VCO with current-reuse technology

Author

Xiaolong Liu ; Lei Zhang ; Li Zhang ; Yan Wang ; Yu Zhiping

Author_Institution

Inst. of Microelectron., Tsinghua Univ., Beijing, China

fYear

2014

Firstpage

1

Lastpage

2

Abstract

A dual-mode ultra-wideband VCO designed in a current-reused configuration is presented. By changing the coupling mode of the transformer tank, an ultra-wide frequency tuning range is achieved, while the current-reused topology is also incorporated to further lower the dc power consumption. Optimized in 90-nm CMOS technology, the proposed VCO attains a tuning range of 96.8% from 2.15 to 6.18 GHz, while consuming 3.8-4.5 mA of current from a 1.2 V supply. The phase noise at 1 MHz offset is from -124.7 dBc/Hz to -116.3 dBc/Hz over the entire frequency tuning range, which corresponds to a FoM_T of between -201 and -204 dBc/Hz.

Keywords

CMOS analogue integrated circuits; LC circuits; circuit optimisation; low-power electronics; microwave oscillators; network topology; phase noise; power consumption; transformers; ultra wideband technology; voltage-controlled oscillators; CMOS technology; DC power consumption; current 3.8 mA to 4.5 mA; current-reuse technology; current-reused topology; dual-mode LC-VCO; dual-mode ultra-wideband VCO; frequency 2.15 GHz to 6.18 GHz; phase noise; size 90 nm; transformer tank; ultra-wide frequency tuning range; voltage 1.2 V; voltage-controlled oscillators; Capacitance; Phase noise; RNA; Resonant frequency; Subspace constraints; Switches; current-reused; dual-mode; phase noise; transformer-based resonator; tuning range; voltage-controlled oscillator (VCO);

fLanguage

English

Publisher

ieee

Conference_Titel

Electron Devices and Solid-State Circuits (EDSSC), 2014 IEEE International Conference on

Type

conf

DOI

10.1109/EDSSC.2014.7061140

Filename

7061140