%T Design of voltage controlled oscillator (VCO) for ultra wideband (UWB) CMOS frequency synthesizer
%A S. Zafar
%A T.Z.A. Zulkifli
%A M. Awan
%C Kuala Lumpur
%P 1383-1386
%K 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
%X 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.
%O cited By 0; Conference of 2007 International Conference on Intelligent and Advanced Systems, ICIAS 2007 ; Conference Date: 25 November 2007 Through 28 November 2007; Conference Code:74506
%L scholars167
%J 2007 International Conference on Intelligent and Advanced Systems, ICIAS 2007
%D 2007
%R 10.1109/ICIAS.2007.4658611