A quadrature LO-generator using an external single-ended clock receiver for dual-band WLAN applications

IEICE Electronics Express

article

Tian Tian¹  Peng Li¹  Hui-qun Huang¹  Bin Wu¹ 

[1] Institute of Microelectronics of Chinese Academy of Sciences;University of Chinese Academy of Sciences

关键词: quadrature local oscillator (LO) ,clock receiver ,single-ended ,WLAN ,quadrature frequency divider ,dual-band;   

DOI  :  10.1587/elex.18.20210130

学科分类：电子、光学、磁材料

来源: Denshi Jouhou Tsuushin Gakkai

【 摘 要 】

A low phase noise quadrature LO-generator for dual-band wireless local area network (WLAN) applications is presented. The quadrature LO-generator is composed of a clock receiver, a CML divider, and two quadrature dividers for the dual-band, respectively. A clock receiver converts the single-ended clock to a differential signal. Then a quadrature divider with a 25% duty cycle generates four quadrature signals for mixers. The split-grounded architecture and multiply ground pads decrease the inductive component of ground impedance as well as the ground bounce of the single-ended input. The phase noise is -143dBc/Hz and -149dBc/Hz at 1MHz offset in the 2.4-GHz and 5-GHz bands, respectively.

【 授权许可】

CC BY