| 一种用于双波段GPS接收机的低功耗宽带CMOS频率合成器 |
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| 引用本文： | 贾海珑,任彤,林敏,陈方雄,石寅,代伐. 一种用于双波段GPS接收机的低功耗宽带CMOS频率合成器[J]. 半导体学报, 2008, 29(10) |
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| 作者姓名： | 贾海珑 任彤 林敏 陈方雄 石寅 代伐 |
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| 作者单位： | 1. 中国科学院半导体研究所,高速电路实验室,北京,100083
2. 美国Auburn大学电机与计算机工程系,AL,36849,美国 |
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| 摘 要： | 提出了一种用于双波段GPS接收机的宽带CMOS频率合成器.该GPS接收机芯片已经在标准O.18μm射频CMOS工艺线上流片成功,并通过整体功能测试.其中压控振荡器可调振荡频率的覆盖范围设计为2～3.6GHz,覆盖了L1,L2波段的两倍频的频率点.并留有足够的裕量以确保在工艺角和温度变化较大时能覆盖所需频率.芯片测试结果显示,该频率综合器在L1波段正常工作时的功耗仅为5.6mW,此时的带内相位噪声小于-82dBc/Hz,带外相位噪声在距离3.142G载波1M频偏处约为-112dBc/Hz,这些指标很好地满足了GPS接收芯片的性能要求.
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| 关 键 词： | 锁相环 全球定位系统 频率合成器 压控振荡器 低功耗 CMOS射频 |
A Low Power Dissipation Wide-Band CMOS Frequency Synthesizer for a Dual-Band GPS Receiver |
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| Jia Haiiong,Ren Tong,Lin Min,Chen Fangxiong,Shi Yin,Dai Fa. A Low Power Dissipation Wide-Band CMOS Frequency Synthesizer for a Dual-Band GPS Receiver[J]. Chinese Journal of Semiconductors, 2008, 29(10) |
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| Authors: | Jia Haiiong Ren Tong Lin Min Chen Fangxiong Shi Yin Dai Fa |
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| Abstract: | This paper presents a wide tuning range CMOS frequency synthesizer for a dual-band GPS receiver,which has been fabricated in a standard 0.18μm RF CMOS process. With a high Q on-chip inductor, the wide-band VCO shows a tuning range from 2 to 3.6GHz to cover 2.45 and 3.14GHz in case of process corner or temperature variation,with a current consumption varying accordingly from 0.8 to 0.4mA,from a 1.8V supply voltage. Measurement results show that the whole frequency synthesizer consumes very low power of 5.6mW working at L1 band with in-band phase noise less than -82dBc/Hz and out-of-band phase noise about-ll2dBc/Hz at 1MHz offset from a 3.142GHz carrier.The performance of the frequency synthesizer meets the requirements of GPS applications very well. |
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| Keywords: | PLL GPS frequency synthesizer VCO low power CMOS RF |
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