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A Low Power Fast-Hopping Frequency Synthesizer Design for UWB Applications  

Ahn, Tae-Won (Dongyang Technical College)
Moon, Je-Cheol (Future Communications IC Inc.)
Kim, Yong-Woo (Soongsil University)
Moon, Yong (Soongsil University)
Publication Information
전자공학회논문지 IE / v.45, no.4, 2008 , pp. 1-6 More about this Journal
Abstract
A fast-hopping frequency synthesizer that reduces complexity and power consumption is presented for MB-OFDM UWB applications. The proposed architecture uses 3960 MHz LC VCO, 528 MHz ring oscillator, passive mixer and LC-tuned Q-enhancement BPF to generate Band Group 1 frequencies. The adjacent channel rejection ratio is less than -40 dBc for 3432 MHz and -H dBc for 4488 MHz. A fast switching SCL-tpre MUX is used to produce the required channel output signal and it takes less than 2.2 ns for band switching. The total power consumption is 47.9 mW from a 1.8 V supply.
Keywords
UWB; PLL; frequency synthesizer; fast-hopping; passive mixer;
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  • Reference
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