Title :
Two effective single-loop high-performance sigma-delta modulators based on 0.13µm CMOS
Author :
Li, Hongyi ; Wang, Yuan ; Jia, Song ; Zhang, Xing
Author_Institution :
Key Lab. of Microelectron. Devices & Circuits, Peking Univ., Beijing, China
Abstract :
In this paper, two high-resolution medium-bandwidth single-loop 4th-order single-bit sigma-delta modulators using a feed-forward and a feedback topology respectively are implemented in 0.13μm CMOS technology. The oversampling ratio is 50 with 312.5kHz input bandwidth, 14.66-bit and 16.62-bit resolution have been reached. The two circuits each consume about 8-mW from a single 1.2V supply voltage. After simulation, under the same circuit conditions, feedback structure gives better performance than feed-forward one. The experiment result could be a useful reference for the topology choice.
Keywords :
CMOS integrated circuits; circuit feedback; feedforward; modulators; sigma-delta modulation; CMOS technology; bandwidth 312.5 kHz; feed-forward topology; feedback topology; high-resolution medium-bandwidth fourth-order single-bit sigma-delta modulator; oversampling ratio; single-loop high-performance sigma-delta modulator; size 0.13 mum; voltage 1.2 V; Bandwidth; CMOS integrated circuits; Capacitors; Clocks; Integrated circuit modeling; Modulation; Topology; feed-forward topology; feedback topology; high-resolution; sigma-delta modulator; switch-capacitor (SC) integrator;
Conference_Titel :
Solid-State and Integrated Circuit Technology (ICSICT), 2010 10th IEEE International Conference on
Conference_Location :
Shanghai
Print_ISBN :
978-1-4244-5797-7
DOI :
10.1109/ICSICT.2010.5667728
