Comparative Assessment of Adaptive Body-Bias SOI Pass-Transistor Logic |
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Authors: | Geun?Rae?Cho Email author" target="_blank">Tom?ChenEmail author |
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Affiliation: | (1) SICAS Group, EE Department of Sharif University of Technology, Tehran and Iran Microelectronics Research Center, Iran;(2) Mixcore Design, P.O. Box 271, Northridge, CA 91328, USA |
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Abstract: | A very low voltage transconductor for video frequency range applications and compatible with standard CMOS technology is described.
In the proposed transconductor, except the DC level shifter circuit (DCLS), the whole transconductor uses the main supply
voltage which can be as low as 1.5 V in a standard 0.6 μm CMOS technology] while the DCLS uses a simple charge-pump circuit
as its supply voltage and has a very low current consumption. In addition, proper common-mode sense and charge-pump circuits
are developed for this low-voltage application. Meanwhile, some techniques to improve the frequency response, linearity, and
noise performance of the proposed transconductor are described.
In a standard 0.6 μm CMOS technology and single 1.5 V supply, simulations show that the proposed transconductor futures a
THD of −50 dB for 1.4 Vpp and 10 MHz input signal and −60 dB for 1.4 Vpp and 1 MHz signal where the threshold voltage of MOS transistors could be as high as 1 V. Based on the proposed transconductor,
a lowpass filter with 700 kHz to 8 MHz programmable cutoff frequency and a bandpass 10.7 MHz second order filter were implemented.
Armin Tajalli received the B.Sc. from Sharif University of Technology (SUT), Tehran, Iran, in 1997, and M.Sc. from Tehran Polytechnic University,
Tehran, Iran, in 1999.
From 1998 he has joint Emad Co. as a senior design engineer were he has worked on several industrial and R&D projects on analog
and mixed-mode ICs. He received the award of the Best Design Engineer from Emad Co., 2001, the Kharazmi Award of Industrial
Research and Development, Iran, 2002, and Presidential Award of the Best Iranian Researchers, in 2003. He is now working toward
his PhD degree at SUT. His current interests are design of high speed circuits for telecommunication systems.
Mojtaba Atarodi received the B.S.E.E. from Amir Kabir University of Technology (Tehran Polytechnic) in 1985, and M.Sc. degree in electrical
engineering from the University of California, Irvine, in 1987. He received the Ph.D. degree from the University of Southern
California (USC) on the subject of analog IC design in 1993.
From 1993 to 1996 he worked with Linear Technology Corporation as a senior analog design engineer. Since then, he has been
consulting with different IC companies. He is currently a visiting professor at Sharif University of Technology. He has published
more than 30 technical papers in the area of analog and mixed-signal integrated circuit design as well as analog CAD tools. |
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Keywords: | low voltage transconductor gm-C filter DC level shifter voltage doubler charge pump circuit |
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