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A switch controlled dual‐band band pass ΔΣ modulator
Author(s) -
Park Bonghyuk,
Jang Seunghyun,
Jung Jaeho
Publication year - 2012
Publication title -
microwave and optical technology letters
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.304
H-Index - 76
eISSN - 1098-2760
pISSN - 0895-2477
DOI - 10.1002/mop.27207
Subject(s) - varicap , delta sigma modulation , comparator , electrical engineering , physics , capacitor , multi band device , microwave , resonator , band pass filter , noise shaping , voltage , electronic engineering , engineering , telecommunications , cmos , capacitance , electrode , antenna (radio) , quantum mechanics
A switch controlled fourth‐order dual‐band bandpass delta‐sigma modulator (BPDSM) is proposed. It consists of two stage second‐order resonator, high‐speed comparator, multifeedback current digital‐to‐analog converter, and clock distributer. The band selection is controlled by capacitor bank, and fine frequency tuning is done by varactor. The implemented BPDSM shows a peak signal‐to‐noise‐ratio is 41.6 dB, 42.5 dB, an error vector magnitude is 3.06%, 2.4% in 882 MHz, 955 MHz, respectively, and a differential output voltage swing is 1.32Vp‐p with dc power consumption of 389 mW. © 2012 Wiley Periodicals, Inc. Microwave Opt Technol Lett 54:2784–2787, 2012; View this article online at wileyonlinelibrary.com. DOI 10.1002/mop.27207