Open AccessBandpass ΔΣ ADC using pipelined SAR ADC
Author(s) -
Oh S.,
Kim K.,
Chae H.
Publication year - 2020
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/el.2020.0314
Subject(s) - successive approximation adc , oversampling , band pass filter , computer science , undersampling , shaping , energy (signal processing) , electronic engineering , signal to noise ratio (imaging) , noise (video) , bandwidth (computing) , mathematics , telecommunications , artificial intelligence , electrical engineering , capacitor , engineering , voltage , statistics , image (mathematics)
This Letter proposes a second‐order bandpass ΔΣ ADC using a pipelined successive‐approximation‐register (SAR) ADC as an internal quantiser. The second‐order bandpass noise‐shaping is achieved by utilising the residue signal after SAR conversion and inherent delay existing in a pipelined structure. The proposed ADC can show very high resolution even with low‐order noise‐shaping and low oversampling ratio. Also, it shows good energy efficiency and a high sampling rate due to the use of a pipelined SAR ADC as a quantiser.