Title :
9μW 88dB DR fully-clocked switched-opamp ΔΣ modulator with novel efficient resonator
Author :
Xu, Jie ; Wu, Xiaojie ; Zhao, Mengying ; Shen, Jianbing ; Liu, B.
Author_Institution :
Inst. of VLSI Design, Zhejiang Univ., Hangzhou, China
Abstract :
A 9μW 88dB dynamic range (DR) switched-opamp (SO) μμ modulator is presented. A new SO with a fully switched-off scheme is proposed, which results in a 50μ power saving and double figure-of-merit over the traditional structure. Also, a novel resonator is applied to realise a zero-optimising coefficient of 1/100 with 75μ power and 70μ area reduction compared with the conventional one.
Keywords :
delta-sigma modulation; operational amplifiers; dynamic range; figure-of-merit; fully-clocked switched-opamp ΔΣ modulator; power 9 muW; power saving; zero-optimising coefficient;
Journal_Title :
Electronics Letters
DOI :
10.1049/el.2010.1776
