针对低温多晶硅(low temperature poly-silicon,LTPS)和低温多晶氧化物(low temperature polycrystalline oxide,LTPO)工艺下的有机电致发光显示器(organic light emitting diode,OLED)电路设计时,驱动译码电路瞬态产生大电流引起的闩...针对低温多晶硅(low temperature poly-silicon,LTPS)和低温多晶氧化物(low temperature polycrystalline oxide,LTPO)工艺下的有机电致发光显示器(organic light emitting diode,OLED)电路设计时,驱动译码电路瞬态产生大电流引起的闩锁效应烧坏器问题,提出一种具有瞬态电流限制能力的全N增强型金属氧化物半导体(N-enhancement type metal oxide semiconductor,NMOS)场效应管的译码器电路设计方法。该方法基于树状网络进行译码和限流,利用支路简并方法进行逻辑化简,采用共源共栅结构中的输出阻抗限制译码瞬态过程的最大电流;在SMIC 180 nm CMOS工艺下完成设计,核心电路面积为470.69μm^(2)。2种不同输入条件下的仿真结果表明,采用格雷码对输入激励进行编码的5-32全NMOS译码器的功耗延迟积仅为9.77×10^(-20)J·s,比同等工艺、电源电压、温度条件下设计的CMOS 5-32译码器降低了81.8%;瞬态译码时的最大电流为11.69μA,比CMOS 5-32译码器降低了99.44%。展开更多
基于"U"形增强型双扩散金属氧化物半导体(DMOS+)平面元胞、增强型受控缓冲层(CPT+)技术及结终端扩展(JTE)终端结构,通过引入载流子存储层、优化背面缓冲层及背面集电极结构,开发出低导通损耗、高关断能力及宽短路安全工作区的...基于"U"形增强型双扩散金属氧化物半导体(DMOS+)平面元胞、增强型受控缓冲层(CPT+)技术及结终端扩展(JTE)终端结构,通过引入载流子存储层、优化背面缓冲层及背面集电极结构,开发出低导通损耗、高关断能力及宽短路安全工作区的4 500 V IGBT芯片。高温测试(Tj=125℃)结果表明,该4 500 V IGBT的导通压降(Vceon)为3 V,能够关断6.75倍额定电流,并通过了Vgeon=21.5 V、tsc=15μs的极限短路测试;4 500 V/1 200 A IGBT模块的最高工作结温Tj达150℃。展开更多
A novel metal-free photocatalyst--sulfur/graphene （S/GR） composite--has been synthesized using a facile one-pot, two-step hydrothermal method with thiosulfate and graphene oxide （GO） as precursors. A green reducta...A novel metal-free photocatalyst--sulfur/graphene （S/GR） composite--has been synthesized using a facile one-pot, two-step hydrothermal method with thiosulfate and graphene oxide （GO） as precursors. A green reductant--L-ascorbic add--was used to transform GO to GR under mild conditions. The photocatalyst powders were characterized by Fourier transform infrared spectroscop, X-ray diffraction, transmission electron microscopy, scanning electron microscopy, and energy dispersive spectroscopy. Experimental tests were conducted on the photocatalytic decomposition of methyl orange （MO） by different catalysts. Compared to pure oL-S, the as-prepared S/GR composite showed much enhanced photocatalytic activity for the degradation of MO under both UV and solar light. The presence of GR also greatly increased the hydrophilicity and adsorption capacity of the catalyst material. The results indicate that the incorporation of GR with a-S results in a synergistic effect for the S-based photocatalysts offering more effective environmental applications.展开更多
文摘针对低温多晶硅(low temperature poly-silicon,LTPS)和低温多晶氧化物(low temperature polycrystalline oxide,LTPO)工艺下的有机电致发光显示器(organic light emitting diode,OLED)电路设计时,驱动译码电路瞬态产生大电流引起的闩锁效应烧坏器问题,提出一种具有瞬态电流限制能力的全N增强型金属氧化物半导体(N-enhancement type metal oxide semiconductor,NMOS)场效应管的译码器电路设计方法。该方法基于树状网络进行译码和限流,利用支路简并方法进行逻辑化简,采用共源共栅结构中的输出阻抗限制译码瞬态过程的最大电流;在SMIC 180 nm CMOS工艺下完成设计,核心电路面积为470.69μm^(2)。2种不同输入条件下的仿真结果表明,采用格雷码对输入激励进行编码的5-32全NMOS译码器的功耗延迟积仅为9.77×10^(-20)J·s,比同等工艺、电源电压、温度条件下设计的CMOS 5-32译码器降低了81.8%;瞬态译码时的最大电流为11.69μA,比CMOS 5-32译码器降低了99.44%。
文摘基于"U"形增强型双扩散金属氧化物半导体(DMOS+)平面元胞、增强型受控缓冲层(CPT+)技术及结终端扩展(JTE)终端结构,通过引入载流子存储层、优化背面缓冲层及背面集电极结构,开发出低导通损耗、高关断能力及宽短路安全工作区的4 500 V IGBT芯片。高温测试(Tj=125℃)结果表明,该4 500 V IGBT的导通压降(Vceon)为3 V,能够关断6.75倍额定电流,并通过了Vgeon=21.5 V、tsc=15μs的极限短路测试;4 500 V/1 200 A IGBT模块的最高工作结温Tj达150℃。
文摘A novel metal-free photocatalyst--sulfur/graphene （S/GR） composite--has been synthesized using a facile one-pot, two-step hydrothermal method with thiosulfate and graphene oxide （GO） as precursors. A green reductant--L-ascorbic add--was used to transform GO to GR under mild conditions. The photocatalyst powders were characterized by Fourier transform infrared spectroscop, X-ray diffraction, transmission electron microscopy, scanning electron microscopy, and energy dispersive spectroscopy. Experimental tests were conducted on the photocatalytic decomposition of methyl orange （MO） by different catalysts. Compared to pure oL-S, the as-prepared S/GR composite showed much enhanced photocatalytic activity for the degradation of MO under both UV and solar light. The presence of GR also greatly increased the hydrophilicity and adsorption capacity of the catalyst material. The results indicate that the incorporation of GR with a-S results in a synergistic effect for the S-based photocatalysts offering more effective environmental applications.
