Authors: Ling Zhang Hyung Joon Kim Vinay Nadig Mohammed Ismail
Publish Date: 2006/09/11
Volume: 49, Issue: 3, Pages: 323-341
Abstract
The next generation of cellular systems will be increasingly similar to a data communication system Not only will it transfer voice and multimedia data it will also be integrated with WLAN to access Internet whenever possible Thus these cellular systems need highly integrated multistandard receivers The design of the A/D converter in such receivers is a big challenge A GSM/WCDMA/WLAN trimode receiver is first designed on the system level A reconfigurable ΣΔ modulator which is suitable for GSM/WCDMA/WLAN receiver is then proposed in this paper According to the different signal bandwidth and Dynamic Range DR specifications this ΣΔ modulator is reconfigured to achieve the required dynamic range with less power consumption The prototype is implemented in TSMC 018μm CMOS process with 18 V power supply The circuit achieves signaltonoiseanddistortionratio of 82 dB for GSM 75 dB for WCDMA and 58 dB for WLANLing Zhang obtained her BS and MS degrees in Automatic Control from Beijing University of Aeronautics and Astronautics Beijing China in 1993 and 1996 respectively She received the PhD degree in Electrical Engineering from the Ohio State University Columbus OH in 2005 She is currently with Nvidia Corporation Santa Clara CA Her research interests lie in mixedsignal circuits including multistandard wireless receiver design high speed sigmadelta ADC and frequency synthesizer/PLL/CDRVinay Nadig was born in Bangalore India in 1977 He received the MS degree in Electrical Engineering from The Ohio State University and is currently working towards his PhD degree there His research interests include low power sigma delta ADCs for wireless receivers and design methodologies for complex mixed signal systemsMohammed Ismail has over 20 years experience of RD in the fields of analog RF and mixed signal integrated circuits He has held several positions in both industry and academia and has served as a corporate consultant to nearly 30 companies in the US Europe and the far east He is The Founding Director of the Analog VLSI Lab at Ohio State and has advised the thesis work of 39 PhD and over 75 MS students His current interest lies in research involving digitally programmable/configurable fully integrated radios with focus on low voltage/low power firstpass solutions for 3G and 4G wireless handheldsHe publishes intensively in this area and has been awarded 11 patents He has coedited and coauthored several books including a text on Analog VLSI Signal and Information Processing McGraw Hill His last book 2004 is entitled CMOS PLLs and VCOs for 4G Wireless Springer He cofounded ANACADEgypt now part of Mentor Graphics Inc and Spirea AB Stockholm now Firstpass Technologies Inc a developer of CMOS radio and mixed signal IPs for handheld wireless applicationsDr Ismail has been the recipient of several awards including the US National Science Foundation Presidential Young Investigator Award the US Semiconductor Research Corp Inventor Recognition Awards in 1992 and 1993 the Ohio State Lumley Research Award in 1992 1997 and 2002 and a Fulbright/Nokia fellowship Award in 1995 He is the founder of the International Journal of Analog Integrated Circuits and Signal Processing Springer and serves as the Journals EditorInChief He has served as Associate Editor for many IEEE Transactions was on the Board of Governors of the IEEE Circuits and Systems Society and is the Founding Editor of “The Chip” a Column in The IEEE Circuits and Devices Magazine He obtained his BS and MS degrees in Electronics and Communications from Cairo University Egypt and the PhD degree in Electrical Engineering from the University of Manitoba Canada He is a Fellow of IEEE
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