NDLI: A Low-Voltage Fully Differential Pure Current Mode Current Operational Amplifier

Content Provider	Springer Nature Link
Author	Ara, Mahdi Behesht Azhari, Seyed Javad
Copyright Year	2015
Abstract	In this paper a novel high-frequency fully differential pure current mode current operational amplifier (COA) is proposed that is, to the authors’ knowledge, the first pure MOSFET Current Mode Logic (MCML) COA in the world, so far. Doing fully current mode signal processing and avoiding high impedance nodes in the signal path grant the proposed COA such outstanding properties as high current gain, broad bandwidth, and low voltage and low-power consumption. The principle operation of the block is discussed and its outstanding properties are verified by HSPICE simulations using TSMC $$0.18\,μ \hbox {m}$$ CMOS technology parameters. Pre-layout and Post-layout both plus Monte Carlo simulations are performed under supply voltages of $$\pm 0.75\,\hbox {V}$$ to investigate its robust performance at the presence of fabrication non-idealities. The pre-layout plus Monte Carlo results are as; 93 dB current gain, $$8.2\,\hbox {MHz}\,\, f_{-3\,\text {dB}}, 89^{\circ }$$ phase margin, 137 dB CMRR, 13 $$\Omega $$ input impedance, $$89\,\hbox {M}\Omega $$ output impedance and 1.37 mW consumed power. Also post-layout plus Monte Carlo simulation results (that are generally believed to be as reliable and practical as are measuring ones) are extracted that favorably show(in abovementioned order of pre-layout) 88 dB current gain, $$6.9\,\hbox {MHz} f_{-3\text {db}} , 131^{\circ }$$ phase margin and 96 dB CMRR, $$22\,\Omega $$ input impedance, $$33\,\hbox {M}\Omega $$ output impedance and only 1.43 mW consumed power. These results altogether prove both excellent quality and well resistance of the proposed COA against technology and fabrication non-idealities.
Starting Page	2626
Ending Page	2639
Page Count	14
File Format	PDF
ISSN	0278081X
Journal	Circuits, Systems, and Signal Processing
Volume Number	35
Issue Number	7
e-ISSN	15315878
Language	English
Publisher	Springer US
Publisher Date	2015-09-12
Publisher Place	New York
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Fully differential COA High-frequency COA High gain COA Current mode signal processing Circuits and Systems Electrical Engineering Signal, Image and Speech Processing Electronics and Microelectronics, Instrumentation
Content Type	Text
Resource Type	Article
Subject	Applied Mathematics Signal Processing

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1	Ministry of Education (GoI), Department of Higher Education	Sanctioning Authority	https://www.education.gov.in/ict-initiatives
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4	Project PI / Joint PI	Principal Investigator and Joint Principal Investigators of the project	Dr. B. Sutradhar bsutra@ndl.gov.in Prof. Saswat Chakrabarti will be added soon
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