Open AccessAccuracy‐enhanced switched‐capacitor stages using low‐gain opamps
Author(s) -
Zhang Y.,
Chen C.H.,
Temes G.C.
Publication year - 2013
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.2012.3827
Subject(s) - switched capacitor , integrator , capacitor , operational amplifier , charge amplifier , compensation (psychology) , capacitive sensing , electronic engineering , capacitance , computer science , control theory (sociology) , electrical engineering , voltage , engineering , physics , cmos , amplifier , psychology , control (management) , electrode , quantum mechanics , artificial intelligence , psychoanalysis
A charge compensation technique is proposed for switched capacitor stages with low‐gain opamps. It cancels the error charge flow during the operation phase, thus enhancing the accuracy. A capacitive T‐network can be employed to implement the resulting large capacitor ratio. A switched‐capacitor integrator and a sample‐and‐hold stage were designed and simulated to verify the proposed technique.