东南大学学报（自然科学版）2011，Vol.41Issue(6)：1146-1151,6.DOI:10.3969/j.issn.1001-0505.2011.06.005
780/868/915MHz频段无线传感器网络低功耗电流复用频率综合器
780/868/915 MHz frequency bands low power current reusing frequency synthesizer for wireless sensor network
摘要
Abstract
A low power frequency synthesizer suited for wireless sensor network transceiver in 780 (China)/868( Europe)/915 ( USA) MHz frequency bands is proposed. The current reusing technique is adopted to make the voltage controlled oscillator (VCO) and divider share a common bias current so to cut down the power budget. A novel lock detector with programmable locked-detecting thresholds is integrated in frequency synthesizer to detect the locked time. Frequency synthesizer was fabricated in 0.18 u,m CMOS (complementary metal oxide semiconductor) technology and the measurement was carried out. Test results show that the frequency rang of synthesizer is 770 - 930 MHz; when the output frequency is 868 MHz, the phase noise is - 87 dBc/Hz in band, with - 98 dBc/Hz @ 100 kHz and - 124 dBc/Hz@ 1 MHz; the measured locked time is 91 -112 u,s with different locked-detecting thresholds; the total current of synthesizer is 3.9 mA under 1.8 V supply.关键词
无线传感器网络/低功耗/电流复用/频率综合器/压控振荡器/锁定检测Key words
wireless sensor network/low power/current reusing/frequency synthesizer/voltage controlled oscillator/locked detecting分类
信息技术与安全科学引用本文复制引用
阴亚东,张利红,孟海涛,杜占坤,阎跃鹏..780/868/915MHz频段无线传感器网络低功耗电流复用频率综合器[J].东南大学学报（自然科学版）,2011,41(6):1146-1151,6.基金项目
国家科技重大专项资助项目(2009ZX03006-005). （2009ZX03006-005）
