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Nested-Current-Mirror Rail-to-Rail-Output Single-Stage Amplifier with Enhancements of DC Gain, GBW and Slew Rate
Zushu Yan1; Pui-In Mak1,2; Man-Kay Law1,2; Rui P. Martins1,2,3; Franco Maloberti4
2015-10-01
Source PublicationIEEE Journal of Solid-State Circuits
ISSN00189200
Volume50Issue:10Pages:2353-2366
Abstract

For better area and power efficiencies, rail-to-rail-output single-stage amplifiers are a potential replacement of their multi-stage counterparts, especially for display applications that entail massive buffer amplifiers in their column drivers. This paper describes a nested-current-mirror (NCM) technique for a single-stage amplifier to achieve substantial enhancements of DC gain, gain-bandwidth product (GBW) and slew rate (SR). Specifically, NCM is customizable for different mirror steps, and sub mirror ratios, to balance the performance metrics and capacitive-load (C) drivability, avoiding any compensation passives while preserving a rail-to-rail output swing. Analytical treatments of the NCM technique in terms of performance limits and robustness reveal that the NCM amplifier can surpass the fundamental power-efficiency limit set by the basic differential-pair (DP) amplifier. Two prototypes, 3-step and 4-step NCM amplifiers, were fabricated in 0.18 μm CMOS for systematic comparison with the DP amplifier. The former represents a robust design exhibiting 72 dB DC gain and 0.0028-0.27 MHz GBW over 0.15-15 nF C with > 80° phase margin (PM). The latter embodies an aggressive design attaining 84 dB DC gain and 0.013-1.24 MHz GBW over 0.15-15 nF C with > 62° PM. All amplifiers were sized for the same area (0.0013 mm) and power (3.6 μW).

KeywordArea Efficiency Cmos Current Mirror Dc Gain Differential-pair (Dp) Amplifier Frequency Compensation Gain-bandwidth Product (Gbw) Low Temperature Polysilicon Lcd Multi-stage Amplifier Nested Current Mirror Rail-to-rail Output Swing Single-stage Amplifier Slew Rate (Sr) Stability
DOIhttp://doi.org/10.1109/JSSC.2015.2453195
URLView the original
Indexed BySCI
Language英语
WOS Research AreaEngineering
WOS SubjectEngineering, Electrical & Electronic
WOS IDWOS:000362359700012
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Citation statistics
Cited Times [WOS]:27   [WOS Record]     [Related Records in WOS]
Document TypeJournal article
CollectionDEPARTMENT OF ELECTRICAL AND COMPUTER ENGINEERING
INSTITUTE OF MICROELECTRONICS
Corresponding AuthorPui-In Mak
Affiliation1.State-Key Laboratory of Analog and Mixed-Signal VLSI and FST-ECE, University of Macau, Taipa, Macao, China
2.UMTEC, Macao, China
3.Instituto Superior Técnico, Universidade de Lisboa, Lisbon, Portugal
4.Department of Electrical Engineering, Universitá degli Studi di Pavia, 27100 Pavia, Italy
First Author AffilicationUniversity of Macau
Corresponding Author AffilicationUniversity of Macau
Recommended Citation
GB/T 7714
Zushu Yan,Pui-In Mak,Man-Kay Law,et al. Nested-Current-Mirror Rail-to-Rail-Output Single-Stage Amplifier with Enhancements of DC Gain, GBW and Slew Rate[J]. IEEE Journal of Solid-State Circuits,2015,50(10):2353-2366.
APA Zushu Yan,Pui-In Mak,Man-Kay Law,Rui P. Martins,&Franco Maloberti.(2015).Nested-Current-Mirror Rail-to-Rail-Output Single-Stage Amplifier with Enhancements of DC Gain, GBW and Slew Rate.IEEE Journal of Solid-State Circuits,50(10),2353-2366.
MLA Zushu Yan,et al."Nested-Current-Mirror Rail-to-Rail-Output Single-Stage Amplifier with Enhancements of DC Gain, GBW and Slew Rate".IEEE Journal of Solid-State Circuits 50.10(2015):2353-2366.
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