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首页> 外文期刊>IEEE Journal of Solid-State Circuits >A 1.8 formula formulatype='inline'tex Notation='TeX'$mu$/tex /formulaW 60 nVformula formulatype='inline'tex Notation='TeX'$/surd$/tex /formulaHz Capacitively-Coupled Chopper Instrumentation Amplifier in 65 nm CMOS for Wireless Sensor Nodes
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A 1.8 formula formulatype='inline'tex Notation='TeX'$mu$/tex /formulaW 60 nVformula formulatype='inline'tex Notation='TeX'$/surd$/tex /formulaHz Capacitively-Coupled Chopper Instrumentation Amplifier in 65 nm CMOS for Wireless Sensor Nodes

机译:1.8 公式 formulatype=“inline”tex Notation=“TeX”$mu$/tex /formulaW 60 nVformula formulatype=“inline”tex Notation=“TeX”$/surd$/tex /formulaHz 电容耦合斩波器仪表放大器,采用 65 nm CMOS 封装,用于无线传感器节点

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This paper presents a low-power precision instrumentation amplifier intended for use in wireless sensor nodes. It employs a capacitively-coupled chopper topology to achieve a rail-to-rail input common-mode range as well as high power efficiency. A positive feedback loop is employed to boost its input impedance, while a ripple reduction loop suppresses the chopping ripple. To facilitate bio-potential sensing, an optional DC servo loop may be employed to suppress electrode offset. The IA achieves 1 $mu{hbox{V}}$ offset, 0.16% gain inaccuracy, 134 dB CMRR, 120 dB PSRR and a noise efficiency factor of 3.3. The instrumentation amplifier was implemented in a 65 nm CMOS technology. It occupies only 0.1 ${hbox{mm}}^{2}$ chip area (0.2 ${hbox{mm}}^{2}$ with the DC servo loop) and consumes 1.8 $mu{hbox{A}}$ current (2.1 $mu{hbox{A}}$ with the DC servo loop) from a 1 V supply.
机译:本文介绍了一种用于无线传感器节点的低功耗精密仪表放大器。它采用电容耦合斩波器拓扑结构,可实现轨到轨输入共模范围和高功率效率。正反馈环路用于提升其输入阻抗,而纹波抑制环路则抑制斩波纹波。为了便于生物电位传感,可以使用可选的直流伺服回路来抑制电极偏移。IA的失调为1 $mu{hbox{V}}$,增益误差为0.16%,CMRR为134 dB,PSRR为120 dB,噪声效率因数为3.3。仪表放大器采用65 nm CMOS技术实现。它仅占用 0.1 ${hbox{mm}}^{2}$ 芯片面积(直流伺服环路为 0.2 ${hbox{mm}}^{2}$),1 V 电源消耗 1.8 $mu{hbox{A}}$ 电流(直流伺服环路为 2.1 $mu{hbox{A}}$)。

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