Name
Abstract | ||
|---|---|---|
A low-power high-resolution Delta-Sigma modulator for audio codec, designed in Global-Foundries BCD 0.18μm 1P4M CMOS process, is presented. The modulator employs a fourth-order single-loop feedforward topology with a 3bit-quantizer. A novel structure of Switched-Opamp (SO) utilizing current-starvation and Slew-Rate (SR) boosting is adopted to meet the requirements of high performance and fast settling time. The opamp-shared technique and two-step summation are used to reduce power dissipation further. Meanwhile, to improve the resolution, chopper-stabilization (CHS) and pseudo data-weighted-averaging (PDWA) circuits are employed in this paper. The proposed modulator achieves 3.86mW power consumption and 106.4dB Signal-to-Noise Distortion Ratio (SNDR) with a FOM value of 0.56pJ/conv.-step at a supply voltage of 3.3V and a high working frequency of 6.25MHz, which is suitable for audio applications. |
Year | DOI | Venue |
|---|---|---|
2014 | 10.1109/MWSCAS.2014.6908526 | Circuits and Systems |
Keywords | Field | DocType |
cmos analogue integrated circuits,audio coding,audio-frequency amplifiers,choppers (circuits),codecs,delta-sigma modulation,low-power electronics,operational amplifiers,chs,fom,global-foundries bcd 1p4m cmos process,pdwa,sndr delta-sigma modulator,so,sr,audio codec,current-starvation,fourth-order single-loop feedforward topology,low-power high-resolution delta-sigma modulator,opamp-shared technique,power 3.86 mw,power dissipation reduction,pseudo data-weighted-averaging circuits,quantizer,resolution chopper-stabilization,signal-to-noise distortion ratio,size 0.18 mum,slew-rate boosting,switched-opamp,two-step summation,voltage 3.3 v,word length 3 bit,delta-sigma modulator,opamp-shared | Audio codec,Computer science,Delta-sigma modulation,Electronic engineering,Electrical engineering,Operational amplifier | Conference |
ISSN | Citations | PageRank |
1548-3746 | 0 | 0.34 |
References | Authors | |
1 | 5 | |
Name | Order | Citations | PageRank |
|---|---|---|---|
| zhongyi huang | 1 | 1 | 0.75 |
| menglian zhao | 2 | 0 | 0.34 |
| Xiaolin Yang | 3 | 1 | 2.78 |
| Liyu Lin | 4 | 8 | 3.15 |
| Xiaobo Wu | 5 | 5 | 6.74 |