Title: Impact of MOSFET gate-oxide reliability on CMOS operational amplifier in a 130-nm low-voltage process
Authors: Ker, Ming-Dou
Chen, Jung-Sheng
電機學院
電子工程學系及電子研究所
College of Electrical and Computer Engineering
Department of Electronics Engineering and Institute of Electronics
Keywords: analog circuit;dielectric breakdown;gate-oxide reliability;MOSFETs;operational amplifier
Issue Date: 1-Jun-2008
Abstract: The effect of the MOSFET gate-oxide reliability on operational amplifier is investigated with the two-stage and folded-cascode structures in a 130-nm low-voltage CMOS process. The test operation conditions include unity-gain buffer (close-loop) and comparator (open-loop) configurations under the de stress, ac stress with dc offset, and large-signal transition stress. After overstress, the small-signal parameters, such as small-signal gain, unity-gain frequency, and phase margin, are measured to verify the impact of gate-oxide reliability on circuit performances of the operational amplifier. The gate-oxide reliability in the operational amplifier can be improved by the stacked configuration under small-signal input and output application. The impact of soft and hard gate-oxide breakdowns on operational amplifiers with two-stage and folded-cascode structures has been analyzed and discussed. The hard breakdown has more serious impact on the operational amplifier.
URI: http://dx.doi.org/10.1109/TDMR.2008.922016
http://hdl.handle.net/11536/8742
ISSN: 1530-4388
DOI: 10.1109/TDMR.2008.922016
Journal: IEEE TRANSACTIONS ON DEVICE AND MATERIALS RELIABILITY
Volume: 8
Issue: 2
Begin Page: 394
End Page: 405
Appears in Collections:Articles