一种无线体域网发射机体偏置线性化技术

发布时间：2018-01-25 18:30

本文关键词： 无线体域网放大器线性化集成电路　出处：《电子与信息学报》2017年02期 　论文类型：期刊论文

【摘要】：该文针对无线体域网人体介质通信(Human Body Communication,HBC)发射机严格的输出频谱指标,提出一种利用体偏置线性化技术进行频谱整形的技术。通过设计缓冲器中晶体管体偏置,从而调整晶体管二阶非线性系数,最终消除输出端的二阶互调项(Second order Inter Modulation,IM2)。采用0.35μm CMOS工艺和1.8 V供电电压设计了一个基于体偏置技术的HBC发射机实例。仿真结果显示二阶输入截点(IIP2)优化到90 d Bm,输出频谱在1 MHz处抑制-130 d Br。较传统电路,该技术提高了23 d B频谱抑制,使输出频谱符合无线体域网IEEE802.15.6协议中-120 d Br的指标。
[Abstract]:In this paper, the output spectrum index of human Body communication Body transmitter in wireless body area network (WSNN) is strict. In this paper, a new technique of spectrum shaping based on volume bias linearization is proposed, which adjusts the second order nonlinear coefficient of the transistor by designing the transistor volume bias in the buffer. Finally, the second order Inter Modulation of the output end is eliminated. An example of HBC transmitter based on volume bias technique is designed by using 0.35 渭 m CMOS process and 1.8 V power supply voltage. The simulation results show that the second-order input cut-off point is IIP2). Optimized to 90 dBm. The output spectrum is suppressed by -130dBr-130dBrat 1 MHz. Compared with the traditional circuit, the output spectrum suppression is improved by 23 dB spectrum suppression. The output spectrum accords with the specification of -120dBr in IEEE802.15.6 protocol of wireless body area network.
【作者单位】：西安电子科技大学微电子学院;
【基金】：国家自然科学基金(61504102)~~
【分类号】：TN830
【正文快照】： 无线体域网技术(Wireless Body Area Network,WBAN)被广泛应用于主动医疗[1,2],人体生理指标实时监测等领域,在我国逐步迈入老龄化社会,医疗资源日益紧张的大环境下,具有广阔的应用前景。体表可穿戴设备或植入体内的传感器和中心节点通常组织成星形WBAN网络,然后把提取出的人

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