A low-area power-efficient CMOS active rectifier for wirelessly powered medical devices
A low-area power-efficient CMOS active rectifier for wirelessly powered medical devices
复制标题
适用于无线供电医疗设备的小面积节能 CMOS 有源整流器
DOI：
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发表时间：
2009
期刊：
影响因子：
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通讯作者：
Y. Savaria
中科院分区：
文献类型：
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作者：
S. Hashemi;M. Sawan;Y. Savaria
我们在本文中提出了一种新的全波有源整流器拓扑。它使用单个自举电容器来降低所选 MOS 开关在正输入源周期和负输入源周期中的有效阈值电压。它显着节省了硅面积，同时具有非常高的功率效率和低电压降。该结构不需要复杂的电路设计。使用简单的直接控制方案在适当的时间将自举水库连接到主通道开关。电路中可用的最高电压用于驱动所选晶体管的栅极，以减少泄漏并降低其沟道导通电阻，同时具有高跨导。新设计受益于先进 CMOS 技术中可用的低阈值 MOS。所提出的整流器使用标准 TSMC 0.18 µm CMOS 工艺实现，然后使用幽灵模拟器进行表征。电路已布局，报告的布局后仿真结果与基于原理图的仿真非常一致。与之前报道的双电容器结构相比，该设计节省了近 70% 的面积。
We present in this paper a new full-wave active rectifier topology. It uses a single bootstrapped capacitor to reduce the effective threshold voltage of selected MOS switches in both positive and negative input source cycles. It achieves a significant saving in silicon area while having a remarkably high power efficiency and low voltage drop. The structure does not require complex circuit design. A simple direct control scheme is used to connect the bootstrapped reservoir to the main pass switches at proper time. The highest voltages available in the circuit are used to drive the gates of selected transistors in order to reduce the leakages and to lower their channel on-resistance, while having high transconductance. The new design benefits from low-threshold MOS available in advanced CMOS technologies. The proposed rectifier was implemented using the standard TSMC 0.18 µm CMOS process and then characterized with the SpectreS simulator. The circuit was laid out and reported post-layout simulation results were found in good agreement with schematics-based simulations. The design saves almost 70% area compared to a previously reported double capacitor structure.