A delay-based complex double-sampled resonator for use in ƒs/4 quadrature bandpass ΣΔ modulators

IEICE Electronics Express

Reekmans Stijn¹  Weyten Ludo¹  Rombouts Pieter¹ 

[1] Department of Electronics and Information Systems Laboratory (ELIS), Ghent University (UGent)

关键词: ΣΔ modulator;    switched-capacitor;    double-sampling;   

DOI  :  10.1587/elex.4.192

学科分类：电子、光学、磁材料

来源: Denshi Jouhou Tsuushin Gakkai

【 摘 要 】

References(3)Cited-By(2)This paper extends the circuit implementation of a complex ƒs/4 resonator based on integrators towards double-sampling. Next, an improved double-sampled circuit implementation of a complex ƒs/4 resonator based on delays is introduced. The key features of the proposed circuit are that mismatch does not affect the center frequency nor limit the Q-factor of the resonator and lower sensitivity towards opamp gain. To verify the analytical results extracted in this paper, simulation results are presented.

【 授权许可】

Unknown