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An ultra low power OTA with improved unity gain bandwidth product

Kargaran, Ehsan, Zoka, Negar, Mafinejad, Yasser, Kouzani, Abbas Z. and Mafinezhad, Khalil 2013, An ultra low power OTA with improved unity gain bandwidth product, IEICE electronics express, vol. 10, no. 20, pp. 1-6, doi: 10.1587/elex.10.20130690.

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Title An ultra low power OTA with improved unity gain bandwidth product
Author(s) Kargaran, Ehsan
Zoka, Negar
Mafinejad, Yasser
Kouzani, Abbas Z.
Mafinezhad, Khalil
Journal name IEICE electronics express
Volume number 10
Issue number 20
Start page 1
End page 6
Total pages 6
Publisher Denshi Jouhou Tsuushin Gakkai (Institute of Electronics Information and Communication Engineers)
Place of publication Tokyo, Japan
Publication date 2013
ISSN 1349-2543
1349-9467
Keyword(s) dynamic threshold MOS (DTMOS)
operational transconductance amplifier
ultra low power
ultra low voltage
Summary An operational transconductance amplifier (OTA) using dynamic threshold MOS (DTMOS) and hybrid compensation technique is presented in this paper. The proposed topology is based on a bulk and gate driven input differential pair. Two separate capacitors are employed for the OTA compensation where one of them is used in a signal path and the other one in a non-signal path. The circuit is designed in the 0.18μm CMOS TSMC technology. The proposed design technique shows remarkable enhancement in unity gain-bandwidth and also in DC gain compared to the bulk driven input differential pair OTAs. The Hspice simulation results show that the amplifier has a 92dB open-loop DC gain and a unity gain-bandwidth of 135kHz while operating at 0.4V supply voltage. The total power consumption is as low as 386nW which makes it suitable for low-power bio-medical and bio-implantable applications.
Language eng
DOI 10.1587/elex.10.20130690
Field of Research 090604 Microelectronics and Integrated Circuits
090601 Circuits and Systems
Socio Economic Objective 861603 Integrated Circuits and Devices
HERDC Research category C1 Refereed article in a scholarly journal
Copyright notice ©2013, Denshi Jouhou Tsuushin Gakkai (Institute of Electronics Information and Communication Engineers)
Persistent URL http://hdl.handle.net/10536/DRO/DU:30060962

Document type: Journal Article
Collections: School of Engineering
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Every reasonable effort has been made to ensure that permission has been obtained for items included in DRO. If you believe that your rights have been infringed by this repository, please contact drosupport@deakin.edu.au.