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Design of voltage controlled oscillator (VCO) for ultra wideband (UWB) CMOS frequency synthesizer

M., Awan and S., Zafar and T.Z.A., Zulkifli (2007) Design of voltage controlled oscillator (VCO) for ultra wideband (UWB) CMOS frequency synthesizer. In: 2007 International Conference on Intelligent and Advanced Systems, ICIAS 2007, 25 November 2007 through 28 November 2007, Kuala Lumpur.

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Abstract

Voltage controlled oscillator is one of the fundamental building blocks in the frequency synthesizer architecture. A 4.224-GHz CMOS complementary cross-coupled LC-VCO is designed for multi-band OFDM (MB-OFDM) ultra-wideband (UWB) application. The tuning range of the VCO is from 3.77-GHz to 4.27-GHz or 12-%, which was achieved through pMOS based varactors. The VCO core current consumption is 1.9-mA from a 1.8-V supply voltage. With the combination of source damping resistance of 40-Ω, multi-finger gate structure of pMOS based varactors the 2-μm x 284 fingers and tail biasing resistance of 232-Ω, the phase noise were simulated at - 94.7-dBc/Hz and -120.1-dBc/Hz at 100-kHz and 1-MHz offset, respectively. The VCO circuit is designed in Silterra 0.18-μm 1-poly 6-metal RFMOS process technology. ©2007 IEEE.

Item Type:Conference or Workshop Item (Paper)
Uncontrolled Keywords:Channel capacity; Communication channels (information theory); Frequency allocation; Frequency division multiple access; Frequency synthesizers; Multiplexing; Orthogonal frequency division multiplexing; Phase noise; Signal generators; Telecommunication systems; Varactors; Variable frequency oscillators; Wireless telecommunication systems; CMOS; Current consumptions; Damping resistances; Fundamental building blocks; Gate structures; Multi band orthogonal frequency division multiplexing (MB-OFDM); Process Technologies; Supply voltages; Synthesizer architectures; Tuning ranges; Ultra wideband (UWB); VCO circuits; Voltage controlled oscillator (VCO); Frequency division multiplexing
Subjects:T Technology > TK Electrical engineering. Electronics Nuclear engineering
Departments / MOR / COE:Departments > Electrical & Electronic Engineering
ID Code:314
Deposited By: Assoc Prof Dr Mohammad Awan
Deposited On:04 Mar 2010 02:29
Last Modified:19 Jan 2017 08:27

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