Open AccessSMASH ΔΣ modulator with adderless feed‐forward loop filter
Author(s) -
Honarparvar M.,
Rosa J.M.,
Nabki F.,
Sawan M.
Publication year - 2017
Publication title -
electronics letters
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.375
H-Index - 146
ISSN - 1350-911X
DOI - 10.1049/el.2016.4733
Subject(s) - integrator , network topology , electronic engineering , adder , cascade , linearity , amplifier , topology (electrical circuits) , filter (signal processing) , operational amplifier , delta sigma modulation , transconductance , computer science , engineering , voltage , electrical engineering , cmos , chemical engineering , operating system , transistor
A novel cascade ΔΣ modulator, which combines the benefits of sturdy MASH (SMASH) topology and feed‐forward loop filter, is presented. The proposed ΔΣ architecture is based on moving the power‐hungry adder block from the quantiser input to the first integrator output. The proposed architecture shows a better operational transconductance amplifier (OTA) linearity and relaxed OTA DC‐gain compared with conventional MASH and SMASH topologies. This feature makes the modulator topology more suitable than conventional MASH and SMASH topologies for low‐voltage applications.