A wideband high-resolution time-interleaved sigma-delta modulator with VCO-based quantizer

IEICE Electronics Express

Jun Xu¹  Huajun Fang¹  Xiao Zhao¹ 

[1] Institute of Microelectronics, Tsinghua University

关键词: time-interleaved;    VCO-based quantizer;    sigma-delta modulator;   

DOI  :  10.1587/elex.8.1972

学科分类：电子、光学、磁材料

来源: Denshi Jouhou Tsuushin Gakkai

【 摘 要 】

References(4)A time-interleaved sigma-delta modulator with VCO-based quantizer for next generation wireless applications is presented. This proposed modulator firstly introduces the VCO-based multibit quantizer into the time-interleaved sigma-delta modulator, which can achieve the improvement of the signal bandwidth and signal-to-noise ratio simultaneously. Moreover, these performance metrics have no adverse effects on power consumption, which is more suitable for wireless applications. A two-channel proposed modulator is taken as an example, and the simulation results show that the proposed modulator achieves a signal-to-noise ratio of 112.1dB over a 4.7MHz signal bandwidth with a clock frequency of 300MHz, which improves 100% in the range of signal bandwidth and 21dB in the signal-to-noise ratio compared to the conventional sigma-delta modulator with the same clock frequency and power consumption.

【 授权许可】

Unknown