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Characterization and optimization of partially depleted SOI MOSFETs for high power RF switch applications

机译:用于高功率射频开关应用的部分耗尽型SOI MOSFET的特性和优化

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摘要

Power handling capability is the most stringent specification for an RF switch. The dominant reason to limit the power handling capability is undesirable channel formation (leakage current) on off-state FEETs in the event of large signal input. To characterize leakage current and find the correlation between DC /-Vmeasure-ment and RF PI dB measurement, a new DC characterization method (Float FET Ⅰ-Ⅴ characterization method) reflecting RF switch operation is proposed. Based on the proposed Float FET Ⅰ-Ⅴ method, an experimental study on optimum dc bias point, MOSFET device design, and stacked-FETs device design is performed in order to achieve maximum power handling capability of the RF switch. In addition, compared to RF measurement tests that take a long time, the proposed characterization method rapidly evaluates the various off-state MOSFET leakage current mechanisms affecting the power handling capability of the RF switch.
机译:功率处理能力是RF开关最严格的规格。限制功率处理能力的主要原因是在大信号输入的情况下,关态FEET上会形成不良的通道(漏电流)。为了表征泄漏电流并找到DC / -V测量值与RF PI dB测量值之间的相关性,提出了一种反映RF开关操作的新DC表征方法(Float FETⅠ-Ⅴ表征方法)。基于提出的浮置FETⅠ-Ⅴ方法,对最佳直流偏置点,MOSFET器件设计和堆叠FET器件设计进行了实验研究,以实现RF开关的最大功率处理能力。此外,与需要很长时间的RF测量测试相比,提出的表征方法可以快速评估影响RF开关功率处理能力的各种截止状态MOSFET漏电流机制。

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