Current Reusing VCO and Divide-by-Two Frequency Divider for Quadrature LO Generation

Author

Park, Kyung-Gyu ; Jeong, Chan-Young ; Park, Jae-Woo ; Lee, Jang-Woo ; Jo, Jun-Gi ; Yoo, Changsik

Author_Institution

Dept. of Electron. & Comput. Eng., Hanyang Univ., Seoul

Volume

18

Issue

6

fYear

2008

fDate

6/1/2008 12:00:00 AM

Firstpage

413

Lastpage

415

Abstract

For low-power and accurate quadrature local oscillator (LO) signal generation, an LC-tank voltage controlled oscillator (VCO) operating at double the required LO-frequency reuses the bias current of divide-by-two frequency divider. The current reusing VCO and divide-by-two frequency divider are targeted to generate the LO signals for a 1.57 GHz global positioning system receiver. Implemented in a 0.18 mum CMOS technology, the current reusing VCO and divide-by-two frequency divider consumes 1.7mA from a 1.8 V supply. The measured phase noise is -120dBc/Hz at 1 MHz offset when the carrier frequency is 1.57GHz.

Keywords

CMOS integrated circuits; frequency dividers; phase noise; receivers; signal generators; CMOS technology; LC-tank voltage controlled oscillator; current reusing VCO; divide-by-two frequency divider; global positioning system receiver; low-power oscillator; phase noise; quadrature LO generation; quadrature local oscillator; signal generation; CMOS; current reusing; frequency divider; quadrature local oscilator (LO); voltage controlled oscillator (VCO);

fLanguage

English

Journal_Title

Microwave and Wireless Components Letters, IEEE

Publisher

ieee

ISSN

1531-1309

Type

jour

DOI

10.1109/LMWC.2008.922674

Filename

4530639