| 用于315/433MHz超再生接收机的射频前端关键技术 |
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| 引用本文： | 王欢,王志功,王蓉,徐建,樊祥宁. 用于315/433MHz超再生接收机的射频前端关键技术[J]. 电路与系统学报, 2012, 17(3): 15-19 |
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| 作者姓名： | 王欢 王志功 王蓉 徐建 樊祥宁 |
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| 作者单位： | 东南大学射频与光电集成电路研究所,江苏南京,210018 |
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| 基金项目： | 国家高技术研究发展计划资助项目 |
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| 摘 要： | 采用0.5μm CMOS工艺实现了用于315/433MHz超再生无线接收机的射频前端电路,包括射频放大器和超再生振荡器。文中提出了一种改进型有源电感,提高了射频放大器中谐振回路的品质因数。阐述了振荡器的自偏置效应以及振荡器输出信号幅度和电流源的关系,在此基础上实现了适用于包络检波的差分结构超再生振荡器。测试结果显示,电源电压范围为2.5V~5V,电流小于2.5mA,系统接收灵敏度优于-90dBm。
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| 关 键 词： | 射频前端 射频放大器 超再生振荡器 有源电感 |
RF front-end for 315/433MHz super-regenerative receiver |
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| WANG Huan , WANG Zhi-gong , WANG Rong , XU Jian , FAN Xiang-ning. RF front-end for 315/433MHz super-regenerative receiver[J]. Journal of Circuits and Systems, 2012, 17(3): 15-19 |
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| Authors: | WANG Huan WANG Zhi-gong WANG Rong XU Jian FAN Xiang-ning |
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| Affiliation: | (Institute of RF-& OE-ICs,Southeast University,Nanjing 210018,China) |
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| Abstract: | An RF front-end for super-regenerative receiver operating at 315/433 MHz is implemented in 0.5-μm CMOS,including an RF amplifier and a super-regenerative oscillator.The quality factor of the resonant tank in the RF amplifier is enhanced with the help of the improved active inductor proposed in this paper.This paper illustrates the oscillator’s self-biasing effect and the relationship between oscillator amplitude and current source.And a differential super-regenerative oscillator optimized for envelope detecting is implemented.The measured results show a sensitivity of-90 dBm and a current consumption of <2.5 mA with 2.5V~5V supply. |
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| Keywords: | RF front-end RF amplifier super-regenerative oscillator active inductor |
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