Open AccessA dynamic‐range self‐compensation technique in a noise shaping SAR ADC utilizing mismatch error shaping
Author(s) -
Chen Zhijie,
Li Hongyou,
Jiang Mengqian,
Zhu Sha,
Wan Peiyuan
Publication year - 2022
Publication title -
electronics letters
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.375
H-Index - 146
eISSN - 1350-911X
pISSN - 0013-5194
DOI - 10.1049/ell2.12480
Subject(s) - compensation (psychology) , successive approximation adc , dynamic range , noise (video) , computer science , electronic engineering , noise shaping , control theory (sociology) , comparator , voltage , engineering , electrical engineering , artificial intelligence , psychology , control (management) , psychoanalysis , image (mathematics)
This letter proposes a dynamic‐range (DR) self‐compensation technique to compensate the 6‐dB DR loss caused by the utilization of 1‐MSB mismatch error shaping (MES) in a noise shaping (NS) successive‐approximation‐register ADC. The DR self‐compensation technique is realized by using an additional conversion to reduce the total input voltage in the analog domain, preventing overload effect in the conversion process. A compensation to the output binary code in the digital domain is also added to make the digital output match the analog input. The proposed DR self‐compensation technique can compensate 4.8 dB of the 6‐dB DR loss averagely.