Open AccessEnergy‐efficient high‐accuracy switching method for SAR ADCs
Author(s) -
Rahimi E.,
Yavari M.
Publication year - 2014
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.2013.3451
Subject(s) - successive approximation adc , comparator , converters , capacitor , energy (signal processing) , shaping , voltage , electronic engineering , computer science , dependency (uml) , reduction (mathematics) , mathematics , engineering , electrical engineering , artificial intelligence , statistics , geometry
A new tri‐level switching method for successive approximation register (SAR) analogue‐to‐digital converters (ADCs) is presented. The proposed switching method enhances the efficiency of digital‐to‐analogue converter switching energy by 93.7% and achieves a 75% reduction in the total capacitor size, compared with the conventional SAR ADC. In addition, the accuracy of the proposed SAR ADC has no dependency on the accuracy of the mid‐level reference voltage ( V cm ) except in the least significant bit, and the common‐mode voltage at the input of the comparator will remain approximately unchanged. Analytical calculations and behavioural simulation results are provided to demonstrate the effectiveness of the proposed switching scheme.