Title :
A 9µW 88dB DR fully-clocked switched-opamp ΔΣ modulator with novel power and area efficient resonator
Author :
Xu, Jian ; Wu, Xiaobo ; Wang, Hanqing ; Liu, Bill ; Zhao, Menglian
Author_Institution :
Inst. of VLSI Design, Zhejiang Univ., Hangzhou, China
Abstract :
A 9μW 88dB DR switched-opamp (SO) ΔΣ modulator is implemented in a low cost 0.35μm CMOS process. To evaluate the effects of finite voltage gain and 1/f noise clearly, two high efficient methods are introduced. And a new fully switched-off SO with a 50% power saving and double Figure-of-Merit (FOM) over the traditional type is proposed to reduce the total power. Besides, to improve the performance, a novel resonator idea applicable to SO technique is adopted to realize a coefficient of 1/100 with 75% power and 70% area reduction over the conventional design. The FOM of the designed modulator is highest among the collected recent low power modulators.
Keywords :
CMOS integrated circuits; clocks; delta-sigma modulation; modulators; operational amplifiers; resonators; CMOS process; area efficient resonator; delta-sigma modulator; fully clocked switched opamp; power 9 muW; power efficient resonator; size 0.35 mum; Capacitors; Low power electronics; Modulation; Noise; Power demand; Switches; Topology;
Conference_Titel :
Custom Integrated Circuits Conference (CICC), 2010 IEEE
Conference_Location :
San Jose, CA
Print_ISBN :
978-1-4244-5758-8
DOI :
10.1109/CICC.2010.5617458
