Multipath recycling method for transconductance enhancement of folded cascade amplifier |
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| Affiliation: | 1. School of Geophysics and Information Technology, China University of Geosciences (Beijing), China;2. Institute of Electronics, Chinese Academy of Sciences, China;1. College of Physical Science and Technology, Central China Normal University, Wuhan, China;2. School of Geodesy and Geomatics, Wuhan University, Wuhan, China;1. Department of Physics, Electronics Laboratory, University of Patras, Patras, GR 26504, Greece;2. Department of Microelectronics, Brno University of Technology, Technická 10, Brno, Czech Republic;3. Faculty of Biomedical Engineering, Czech Technical University in Prague, nám. Sítná 3105, Kladno, Czech Republic;1. College of Movie and Media, Sichuan Normal University, Chengdu 610068, PR China;2. Chongqing Key Lab of Mobile Communications Technology, Chongqing University of Posts and Telecommunications, Chongqing 400065, PR China;3. School of Electronic and Information Engineering, Southwest University, Chongqing 400715, PR China;1. School of Electronic Engineering, Xi`an University of Posts & Telecomumnications, Xi''an, China;2. School of Microelectronics, Xidian University, Xi''an, China |
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| Abstract: | A multipath recycling method to enhance transconductance of the folded cascode amplifier is presented in this paper. The proposed method utilizes two idle paths to conduct small signal current, which leads to significant enhancement of transconductance compared to conventional folded cascade structure. Moreover, the improved performance is almost at no expense of power dissipation. The proposed multipath recycling and the conventional amplifiers are all designed in UMC 0.18 μm CMOS technology. Simulation results demonstrate that the transconductance of the proposed amplifier is improved by 450% and dc gain enhances 16 dB when compared with the folded cascode counterpart. |
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| Keywords: | Transconductance enhancement Multipath recycling Folded cascode amplifier |
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