A novel operation mechanism of capacitorless SOl-DRAM （silicon on insulator dynamic random access memory） cell using impact ionization and GIDL （gated-induce drain leakage） effects for write ＂1＂ operation was pr...A novel operation mechanism of capacitorless SOl-DRAM （silicon on insulator dynamic random access memory） cell using impact ionization and GIDL （gated-induce drain leakage） effects for write ＂1＂ operation was proposed. The conventional capacitorless DRAM cell with single charge generating effect is either high speed or low power, while the proposed DG-FinFET （double-gate fin field effect transistor） cell employs the efficient integration of impact ionization and GIDL effects by coupling the front and back gates with optimal body doping profile and proper bias conditions, yielding high speed low power performance. The simulation results demonstrate ideal characteristics in both cell operations and power consumption. Low power consumption is achieved by using GIDL current at 0. luA when the coupling between the front and back gates restrains the impact ionization current in the first phase. The write operation of the cell is within Ins attributed to significant current of the impact ionization effect in the second phase. By shortening second phase, power consumption could be further decreased. The ratio of read ＂1＂ and read ＂0＂ current is more than 9.38E5. Moreover, the cell has great retention characteristics.展开更多
In this work,the dynamics and operation of the totally reboiled reactive distillation columns are visualized in terms of transfer function based process models.This kind of processes is found to be characterized by un...In this work,the dynamics and operation of the totally reboiled reactive distillation columns are visualized in terms of transfer function based process models.This kind of processes is found to be characterized by underdamped step responses due to the special topological configuration and the intricate interplay between the reaction operation and the separation operation involved.The under-dampness can be substantially alleviated through the tight inventory control of bottom reboiler and this presents beneficial effects to process dynamics and operation.Two totally reboiled reactive distillation columns,separating,respectively,a hypothetical synthesis reaction from reactants A and B to product C,and a real decomposition reaction from 1,4-butanediol to tetrahydrofuran and water,are employed to demonstrate these uncommon behaviors.The results obtained give full support to the above qualitative interpretation.Despite the strong influences of reaction kinetics and thermodynamic properties of the reacting mixtures,the totally reboiled reactive distillation columns are generally considered to present such unique behaviors and require tight inventory control of bottom reboiler to facilitate their control system development.展开更多
文摘A novel operation mechanism of capacitorless SOl-DRAM （silicon on insulator dynamic random access memory） cell using impact ionization and GIDL （gated-induce drain leakage） effects for write ＂1＂ operation was proposed. The conventional capacitorless DRAM cell with single charge generating effect is either high speed or low power, while the proposed DG-FinFET （double-gate fin field effect transistor） cell employs the efficient integration of impact ionization and GIDL effects by coupling the front and back gates with optimal body doping profile and proper bias conditions, yielding high speed low power performance. The simulation results demonstrate ideal characteristics in both cell operations and power consumption. Low power consumption is achieved by using GIDL current at 0. luA when the coupling between the front and back gates restrains the impact ionization current in the first phase. The write operation of the cell is within Ins attributed to significant current of the impact ionization effect in the second phase. By shortening second phase, power consumption could be further decreased. The ratio of read ＂1＂ and read ＂0＂ current is more than 9.38E5. Moreover, the cell has great retention characteristics.
基金Supported by The National Natural Science Foundation of China(21076015,21376018,and 21576014)The Fundamental Research Funds for the Central Universities(ZY1503)
文摘In this work,the dynamics and operation of the totally reboiled reactive distillation columns are visualized in terms of transfer function based process models.This kind of processes is found to be characterized by underdamped step responses due to the special topological configuration and the intricate interplay between the reaction operation and the separation operation involved.The under-dampness can be substantially alleviated through the tight inventory control of bottom reboiler and this presents beneficial effects to process dynamics and operation.Two totally reboiled reactive distillation columns,separating,respectively,a hypothetical synthesis reaction from reactants A and B to product C,and a real decomposition reaction from 1,4-butanediol to tetrahydrofuran and water,are employed to demonstrate these uncommon behaviors.The results obtained give full support to the above qualitative interpretation.Despite the strong influences of reaction kinetics and thermodynamic properties of the reacting mixtures,the totally reboiled reactive distillation columns are generally considered to present such unique behaviors and require tight inventory control of bottom reboiler to facilitate their control system development.
