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Improving the Linearity and Power Efficiency of Active Switched-Capacitor Filters in a Compact Die Area
Yaohua Zhao1; Pui-In Mak1; Man-Kay Law1; Rui P. Martins2
2015-12-01
Source PublicationIEEE Transactions on Very Large Scale Integration (VLSI) Systems
ISSN10638210
Volume23Issue:12Pages:3104-3108
Abstract

The die size of multistandard wireless transceivers in ultrascaled CMOS is dominated by the baseband low-pass filters (LPFs), which typically count on passive-RC components to define the time constant. To break this area constraint, this paper revisits the active switched-capacitor (SC) LPF for its united benefits of clock-rate-defined bandwidth, accurate cutoff frequency, and small die size due to capacitor-ratio-based sizing and no spare elements. The key challenges of active-SC LPFs are the speed- and linearity-to-power tradeoffs, which are addressed by two circuit techniques: 1) switched-current assisting (SCA) and 2) precharging (PC). The SCA accelerates the charging speed of the integration capacitor, while the PC improves the linearity when charging the load capacitor. Three prototypes (first order, biquad, and fifth-order Butterworth) fabricated in a 65-nm CMOS process validate the feasibility of the proposed SCA and PC techniques.

KeywordBandwidth (Bw) Clock-rate Defined Cmos Die Area Linearity Low-pass Filter (Lpf) Switched Capacitor (Sc) Tunability Gain-bandwidth Product (Gbw)
DOIhttp://doi.org/10.1109/TVLSI.2014.2382674
URLView the original
Indexed BySCI
Language英语
WOS Research AreaComputer Science ; Engineering
WOS SubjectComputer Science, Hardware & Architecture ; Engineering, Electrical & Electronic
WOS IDWOS:000365206300032
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Cited Times [WOS]:0   [WOS Record]     [Related Records in WOS]
Document TypeJournal article
CollectionDEPARTMENT OF ELECTRICAL AND COMPUTER ENGINEERING
INSTITUTE OF MICROELECTRONICS
Corresponding AuthorYaohua Zhao; Pui-In Mak; Man-Kay Law; Rui P. Martins
Affiliation1.State Key Laboratory of Analog and Mixed-Signal VLSI, Department of Electrical and Computer Engineering, Faculty of Science and Technology, University of Macau, Macau 563003, China
2.State Key Laboratory of Analog and Mixed-Signal VLSI, Department of Electrical and Computer Engineering, Faculty of Science and Technology, University of Macau, Macau 563003, China, and also with the Instituto Superior Técnico, Universidade de Lisboa
First Author AffilicationFaculty of Science and Technology
Corresponding Author AffilicationFaculty of Science and Technology
Recommended Citation
GB/T 7714
Yaohua Zhao,Pui-In Mak,Man-Kay Law,et al. Improving the Linearity and Power Efficiency of Active Switched-Capacitor Filters in a Compact Die Area[J]. IEEE Transactions on Very Large Scale Integration (VLSI) Systems,2015,23(12):3104-3108.
APA Yaohua Zhao,Pui-In Mak,Man-Kay Law,&Rui P. Martins.(2015).Improving the Linearity and Power Efficiency of Active Switched-Capacitor Filters in a Compact Die Area.IEEE Transactions on Very Large Scale Integration (VLSI) Systems,23(12),3104-3108.
MLA Yaohua Zhao,et al."Improving the Linearity and Power Efficiency of Active Switched-Capacitor Filters in a Compact Die Area".IEEE Transactions on Very Large Scale Integration (VLSI) Systems 23.12(2015):3104-3108.
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