A perfectly current matched charge pump with wide dynamic range for ultra low voltage applications

IEICE Electronics Express

Dongdong Zhong¹  Wenquan Sui²  Yan Han¹  Jun Sun¹  Qian Zhou¹  Ray C. C. Cheung³ 

[1] Institute of Microelectronics and Optoelectronics, Zhejiang University;Institute of Nano Research, Zhejiang University;Department of EE, City University of Hong Kong

关键词: charge pump;    current match;    dynamic range;    low voltage;    PLL;   

DOI  :  10.1587/elex.11.20140993

学科分类：电子、光学、磁材料

来源: Denshi Jouhou Tsuushin Gakkai

【 摘 要 】

References(8)A simple and perfectly current matched charge pump for ultra-low voltage applications in phase-locked loops is presented. The charge pump is based on a gate switching architecture to ensure the output dynamic range. The specially designed dual compensation circuits using high threshold transistors together with regular threshold transistors ensure the current mismatch below 1.5% while keeping the output voltage ranging from 0.02 to 0.76 V in 40 nm CMOS Mixed-signal technology at a 0.8 V supply. And the additional body bias circuit reduces the negative impact from the process variation. The proposed circuit helps PLLs reduce the phase offset and spurs even at ultra low supply voltage.

【 授权许可】

Unknown