0.0045 mm2 15.8 μW three-stage amplifier driving 10×-wide (0.15-1.5 nF) capacitive loads with >50° phase margin
Zushu Yan1; Pui-In Mak1; Man-Kay Law1; Rui Paulo Martins1
2015-03-19
Source PublicationElectronics Letters
ISSN00135194
Volume51Issue:6Pages:454-456
Abstract

A three-stage amplifier employing embedded capacitor-multiplier compensation (ECMC) and active parallel compensation (APC) to enhance the area efficiency when driving nF-range capacitive loads (C) is presented. Unlike the conventional current-buffer Miller compensation, ECMC applied to the dominant compensation path saves substantial power and area, while securing a large gain.bandwidth product. The created left-half-plane zero also benefits the phase margin (PM). For the APC, unlike the traditional passive parallel compensation, this work benefits from the Miller effect to avoid the area-consuming resistor, and reduces the entailed capacitances without lowering the parasitic pole position. A multi-path G-boosting second stage enhances the effective transconductance and DC gain. With 0.0045 mm of area and 15.8 μW of power, the 0.18 μm CMOS three-stage amplifier measures 1.13 MHz unity-gain frequency, 0.41 V/μs average slew rate and 56.2° PM at 1 nF C. Stable responses with >50° PM are attained for a 10 × range of C from 0.15 to 1.5 nF. The achieved figure-of-merit accounting for both die area and power compares favourably with the state of the art.

DOIhttp://doi.org/10.1049/el.2014.4391
URLView the original
Indexed BySCI
Language英语
WOS Research AreaEngineering
WOS SubjectEngineering, Electrical & Electronic
WOS IDWOS:000351271700012
Fulltext Access
Citation statistics
Cited Times [WOS]:4   [WOS Record]     [Related Records in WOS]
Document TypeJournal article
CollectionDEPARTMENT OF ELECTRICAL AND COMPUTER ENGINEERING
INSTITUTE OF MICROELECTRONICS
Corresponding AuthorPui-In Mak
Affiliation1.Universidade de Macau
2.Instituto Superior Técnico
Recommended Citation
GB/T 7714
Zushu Yan,Pui-In Mak,Man-Kay Law,et al. 0.0045 mm2 15.8 μW three-stage amplifier driving 10×-wide (0.15-1.5 nF) capacitive loads with >50° phase margin[J]. Electronics Letters,2015,51(6):454-456.
APA Zushu Yan,Pui-In Mak,Man-Kay Law,&Rui Paulo Martins.(2015).0.0045 mm2 15.8 μW three-stage amplifier driving 10×-wide (0.15-1.5 nF) capacitive loads with >50° phase margin.Electronics Letters,51(6),454-456.
MLA Zushu Yan,et al."0.0045 mm2 15.8 μW three-stage amplifier driving 10×-wide (0.15-1.5 nF) capacitive loads with >50° phase margin".Electronics Letters 51.6(2015):454-456.
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