设计了一种利用延伸栅极型晶体管(EGFET)检测溶液pH值的电路,包括信号采集、信号转换与处理、放大电路设计、模数转换器(ADC)及软件设计部分。实测结果表明:设计的电路在溶液pH值4~10范围内输出电压的灵敏度为39.68 m V/pH。与传统的pH...设计了一种利用延伸栅极型晶体管(EGFET)检测溶液pH值的电路,包括信号采集、信号转换与处理、放大电路设计、模数转换器(ADC)及软件设计部分。实测结果表明:设计的电路在溶液pH值4~10范围内输出电压的灵敏度为39.68 m V/pH。与传统的pH玻璃电极相比,设计的传感器具有响应速度快、易于封装、对光和温度不敏感、稳定性好等特点。展开更多
A new SiC asymmetric cell trench metal–oxide–semiconductor field effect transistor(MOSFET)with a split gate(SG)and integrated p^(+)-poly Si/SiC heterojunction freewheeling diode(SGHJD-TMOS)is investigated in this ar...A new SiC asymmetric cell trench metal–oxide–semiconductor field effect transistor(MOSFET)with a split gate(SG)and integrated p^(+)-poly Si/SiC heterojunction freewheeling diode(SGHJD-TMOS)is investigated in this article.The SG structure of the SGHJD-TMOS structure can effectively reduce the gate-drain capacitance and reduce the high gateoxide electric field.The integrated p^(+)-poly Si/SiC heterojunction freewheeling diode substantially improves body diode characteristics and reduces switching losses without degrading the static characteristics of the device.Numerical analysis results show that,compared with the conventional asymmetric cell trench MOSFET(CA-TMOS),the high-frequency figure of merit(HF-FOM,R_(on,sp)×Q_(gd,sp))is reduced by 92.5%,and the gate-oxide electric field is reduced by 75%.In addition,the forward conduction voltage drop(V_(F))and gate-drain charge(Q_(gd))are reduced from 2.90 V and 63.5μC/cm^(2) in the CA-TMOS to 1.80 V and 26.1μC/cm^(2) in the SGHJD-TMOS,respectively.Compared with the CA-TMOS,the turn-on loss(E_(on)) and turn-off loss(E_(off)) of the SGHJD-TMOS are reduced by 21.1%and 12.2%,respectively.展开更多
文摘设计了一种利用延伸栅极型晶体管(EGFET)检测溶液pH值的电路,包括信号采集、信号转换与处理、放大电路设计、模数转换器(ADC)及软件设计部分。实测结果表明:设计的电路在溶液pH值4~10范围内输出电压的灵敏度为39.68 m V/pH。与传统的pH玻璃电极相比,设计的传感器具有响应速度快、易于封装、对光和温度不敏感、稳定性好等特点。
基金Major Science and Technology Projects of Hainan Province,China(Grant Nos.ZDKJ2021023 and ZDKJ2021042)Hainan Provincial Natural Science Foundation of China(Grant Nos.622QN285 and 521QN210)。
文摘A new SiC asymmetric cell trench metal–oxide–semiconductor field effect transistor(MOSFET)with a split gate(SG)and integrated p^(+)-poly Si/SiC heterojunction freewheeling diode(SGHJD-TMOS)is investigated in this article.The SG structure of the SGHJD-TMOS structure can effectively reduce the gate-drain capacitance and reduce the high gateoxide electric field.The integrated p^(+)-poly Si/SiC heterojunction freewheeling diode substantially improves body diode characteristics and reduces switching losses without degrading the static characteristics of the device.Numerical analysis results show that,compared with the conventional asymmetric cell trench MOSFET(CA-TMOS),the high-frequency figure of merit(HF-FOM,R_(on,sp)×Q_(gd,sp))is reduced by 92.5%,and the gate-oxide electric field is reduced by 75%.In addition,the forward conduction voltage drop(V_(F))and gate-drain charge(Q_(gd))are reduced from 2.90 V and 63.5μC/cm^(2) in the CA-TMOS to 1.80 V and 26.1μC/cm^(2) in the SGHJD-TMOS,respectively.Compared with the CA-TMOS,the turn-on loss(E_(on)) and turn-off loss(E_(off)) of the SGHJD-TMOS are reduced by 21.1%and 12.2%,respectively.
