A 0.016mm2144μW three-stage amplifier capable of driving 1-to-15nF capacitive load with >0.95MHz GBW
Yan, Zushu1; Mak, Pui-In1; Law, Man-Kay1; Martins, Rui1,2
Conference Name59th International Solid-State Circuits Conference, ISSCC 2012
Source PublicationDigest of Technical Papers - IEEE International Solid-State Circuits Conference
Conference Date2 19, 2012 - 2 23, 2012
Conference PlaceSan Francisco, CA, United states
Author of SourceInstitute of Electrical and Electronics Engineers Inc.

High-color-depth LCD drivers require nF-range capacitors as the charge reservoirs to handle the glitch energy during the conversion of the DAC [1]. The reference buffers based on multi-stage amplifiers can enhance the precision under low-voltage supplies, but are exposed to instability when loaded by such large capacitive loads (CL). Frequency compensation via damping-factor control [2] is capable of extending the CL-drivability up to 1nF, however, at the cost of penalizing the power (426μW) and area (0.14mm2). Although recent works [3-4] have enhanced gain-bandwidth product (GBW) and slew rate (SR) showing better FOMS(=GBW·CL/Power) and FOML(=SR·CL/Power), the CL-drivability has not been improved (i.e., 0.8nF in [3] and 0.15nF in [4]). This paper describes a three-stage amplifier managed to afford particularly large and wide range of CL(1 to 15nF) with optimized power (144μW) and die size (0.016mm2), being very suitable for compact LCD drivers [5] with different resolution targets. The design barriers are methodically surmounted via local feedback loop (LFL) analysis expanded from [6], which is an insightful control-centric method. Measured at 15nF CL, the attained FOMS(FOML) is >4.48x (>2.55x) beyond that of the state-of-the-art (Fig. 21.6.1). © 2012 IEEE.

Indexed BySCI
WOS Research AreaEngineering
WOS SubjectEngineering, Electrical & Electronic
WOS IDWOS:000314173500016
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Cited Times [WOS]:75   [WOS Record]     [Related Records in WOS]
Document TypeConference paper
Affiliation1.University of Macau, China;
2.Instituto Superior Tecnico, Lisbon, Portugal
First Author AffilicationUniversity of Macau
Recommended Citation
GB/T 7714
Yan, Zushu,Mak, Pui-In,Law, Man-Kay,et al. A 0.016mm2144μW three-stage amplifier capable of driving 1-to-15nF capacitive load with >0.95MHz GBW[C]//Institute of Electrical and Electronics Engineers Inc.,2012:368-369.
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