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Publication


Featured researches published by Babak Nejati.


international solid-state circuits conference | 2011

A 65nm CMOS SoC with embedded HSDPA/EDGE transceiver, digital baseband and multimedia processor

Alberto Cicalini; Sankaran Aniruddhan; Rahul A. Apte; Frederic Bossu; Ojas M. Choksi; Dan Filipovic; Kunal Godbole; Tsai-Pi Hung; Christos Komninakis; David Maldonado; Chiewcharn Narathong; Babak Nejati; Deirdre O'Shea; Xiaohong Quan; Raj Rangarajan; Janakiram G. Sankaranarayanan; Andrew See; Ravi Sridhara; Bo Sun; Wenjun Su; Klaas Van Zalinge; Gang Zhang; Kamal Sahota

Cellular phones in emerging markets have continued to grow with multimedia features such as MP3 playback, video encode and decode, high-resolution cameras and web browsing. To efficiently support multimedia functionalities, highperformance modems are required. There is also a strong demand to reduce the cellular phone PCB footprint, and to enable integration of peripheral devices such as Bluetooth and Wireless LAN. Previously reported SoC or SiP solutions have integrated a GPRS/EDGE radio with modem and limited multimedia capabilities [1–4]. This paper presents a multimode UMTS/GSM RF transceiver integrated with a digital baseband having advanced multimedia functionalities. The SoC, designed in 65nm digital CMOS, supports quad-band GSM/GPRS/EDGE (3GPP R4, Class 12) and tri-band UMTS/WCDMA (3GPP R99, R5 cat 5/6), including band 1–2–4–5–6–8–9–10.


Archive | 2010

Multi-mode multi-band power amplifier module

Aristotele Hadjichristos; Puay Hoe See; Babak Nejati; Guy Klemens; Norman L. Frederick; Gurkanwal Singh Sahota; Marco Cassia; Nathan Pletcher; Yu Zhao; Thomas Andrew Myers


Archive | 2009

Power amplifier with switched output matching for multi-mode operation

Nathan Pletcher; Aristotele Hadjichristos; Yu Zhao; Babak Nejati


Archive | 2010

Digital tunable inter-stage matching circuit

Yu Zhao; Babak Nejati; Nathan Pletcher; Aristotele Hadjichristos


Archive | 2011

Amplifier module with multiple operating modes

Nathan Pletcher; Aristotele Hadjichristos; Babak Nejati


Archive | 2009

Multi-stage impedance matching

Babak Nejati; Yu Zhao; Nathan Pletcher; Aristotele Hadjichristos; Puay Hoe See


Archive | 2012

Impedance matching circuit with tunable notch filters for power amplifier

Jose Cabanillas; Calogero D. Presti; Babak Nejati; Guy Klemens


Archive | 2009

Output circuit with integrated impedance matching, power combining and filtering for power amplifiers and other circuits

Guy Klemens; Nathan Pletcher; Babak Nejati; Norman L. Frederick; Thomas Andrew Myers


Archive | 2008

Linear and polar dual mode transmitter circuit

Sankaran Aniruddhan; Chiewcharn Narathong; Ravi Sridhara; Babak Nejati


Archive | 2011

Multi-antenna wireless device with power combining power amplifiers

Bhushan Shanti Asuri; Babak Nejati

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