NDLI: Adjustably transconductance enhanced bulk-driven OTA with the CMOS technologies scaling

Content Provider	IET Digital Library
Author	Wang, Yongqing Zhao, Xiao Zhang, Qisheng Lv, Xiaolong
Abstract	An adjustably transconductance enhanced bulk-driven operational transconductance amplifier (OTA) working at weak inversion region is presented. Based on the traditional positive feedback source degeneration technique, a proposed current-shunt auxiliary amplifier is employed here to modulate the gate of input differential pairs, achieving a further improvement of the effective transconductance with the CMOS technologies scaling. In addition, an adjustable transconductance enhancement factor is obtained, leading to an enhanced stability performance. Both conventional and proposed bulk-driven OTAs are designed and simulated on CSMC 180 nm process. The simulated results demonstrate that the unity gain-bandwidth of the proposed bulk-driven OTA is improved by 120% compared to that of the conventional counterpart with a little neglected increased power consumption.
Starting Page	276
Ending Page	278
Page Count	3
ISSN	00135194
Volume Number	54
e-ISSN	1350911X
Issue Number	Issue 5, Mar (2018)
Alternate Webpage(s)	https://digital-library.theiet.org/content/journals/el/54/5
Alternate Webpage(s)	https://digital-library.theiet.org/content/journals/10.1049/el.2017.4435
Journal	Electronics Letters
Publisher Date	2018-01-26
Access Restriction	Open
Rights Holder	© The Institution of Engineering and Technology
Subject Keyword	Adjustable Transconductance Enhancement Factor Adjustably Transconductance Enhanced Bulk-driven OTA Amplifiers CMOS Analogue Integrated Circuit CMOS Integrated Circuit CMOS Technology Current-shunt Auxiliary Amplifier Effective Transconductance Enhanced Stability Performance Operational Amplifier Operational Transconductance Amplifier Positive Feedback Source Degeneration Technique Size 180 Nm Weak Inversion Region
Content Type	Text
Resource Type	Article
Subject	Electrical and Electronic Engineering

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