An improved dual-conduction class-C VCO using a tail resistor

Author

Takeuchi, Yasuaki ; Okada, Kenichi ; Matsuzawa, Akira

Author_Institution

Dept. of Phys. Electron., Tokyo Inst. of Technol., Tokyo, Japan

fYear

2011

fDate

10-11 Oct. 2011

Firstpage

204

Lastpage

207

Abstract

This paper proposes a method to improve the power consumption of dual-conduction class-C VCO. The dual-conduction class-C VCO has two pairs of cross-coupled transistors for low supply voltage operation. One is a main pair for the class-C operation, the other is an auxiliary pair for startup. The auxiliary pair continues to operate after the VCO starts class-C operation, which consumes additional power. Thus, we added a resistor to the source node of the auxiliary pair. Since the resistor reduces the current of the auxiliary pair, the power consumption can be improved. The proposed VCO is fabricated by using a 0.18 μm CMOS technology. It oscillates at 5.4 GHz with 0.20V supply voltage, consumes 96μW, and achieves a FoM of -187 dBc/Hz.

Keywords

CMOS integrated circuits; low-power electronics; voltage-controlled oscillators; cross-coupled transistors; dual-conduction class-C VCO; frequency 5.4 GHz; low supply voltage operation; power 96 muW; size 0.18 mum; tail resistor; voltage 0.2 V; CMOS integrated circuits; Logic gates; Phase noise; Resistors; Transistors; Voltage-controlled oscillators;

fLanguage

English

Publisher

ieee

Conference_Titel

Microwave Integrated Circuits Conference (EuMIC), 2011 European

Conference_Location

Manchester

Print_ISBN

978-1-61284-236-3

Type

conf

Filename

6102829