A monolithic CMOS VCO for wireless LAN applications

Bhattacharjee, J.; Mukherjee, Dibyajyoti; Laskar, J.

doi:10.1109/iscas.2002.1010255

Cited by 4 publications

(3 citation statements)

References 14 publications

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“…This translates to a phase noise of -87dBc/Hz @ 1MHz offset. This value is reduced down to -107dBc/Hz @ 1MHz offset for the IEEE 802.11 standard (Bhattacharjee et al, 2002) where the highest data-rate equals 54Mbps using 64-QAM with OFDM in 20MHz channel bandwidth. LC-VCO exhibits lower phase noise than its ring VCO counterpart for the same power consumption (Hajimiri, 1998;Hajimiri, 1999).…”

Section: Low Gain-wide-range Vcomentioning

confidence: 93%

Mobile and Wireless Communications

Tc¹,

Omidyar²

2003

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Her research interests include cooperative relay network, OFDMA resource allocation, adaptive antenna arrays, sensor networks, and signal processing for telecommunication applications.Fumiyuki Adachi received the B.S. and Dr. Eng. degrees in electrical engineering from Tohoku University, Sendai, Japan, in 1973, respectively. In April 1973, he joined the Electrical Communications Laboratories of Nippon Telegraph & Telephone Corporation (now NTT) and conducted various researches on digital cellular mobile communications. From July 1992 to December 1999, he was with NTT Mobile Communications Network, Inc. (now NTT DoCoMo, Inc.), where he led a research group on Wideband CDMA for 3G systems. Since January 2000, he has been with Tohoku University, Sendai, Japan, where he is a Professor at the Dept. of Communications Engineering, Graduate School of Engineering. His research interest is in the area of wireless signal processing (multiaccess, equalization, antenna diversity, adaptive transmission, channel coding, etc.

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Section: Low Gain-wide-range Vcomentioning

confidence: 93%

Mobile and Wireless Communications

Tc¹,

Omidyar²

2003

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“…Too large oscillation amplitude may destroy the gate of MOSFET, and this problem is more and more serious as the gate oxide becomes thinner and thinner with improve of CMOS technology. Not only that, too large oscillation amplitude can also degrade the phase noise performance [4]. Furthermore, stable oscillation amplitude over the whole frequency tuning range is desirable for mixers.…”

Section: Proposed Circuit Analysismentioning

confidence: 99%

“…The traditional LC oscillator can be modeled with a RLC parallel network, in which a variable capacitor is used for frequency tuning [1]. But due to the absence of good varactor compatible with CMOS process, the tuning range of integrated CMOS LCtype VCO is typically lower than 20% of the centre frequency [2,3,4]. Since the lot-to-lot process variations in on-chip capacitance and inductance may be as large as 20%, the oscillation frequency may also have an error of 20% or more for lot-to-lot difference.…”

Section: Introductionmentioning

confidence: 99%