A new 4 H–SiC light triggered thyristor（LTT） with 7-shaped thin n-base doping profile is proposed and simulated using a two-dimensional numerical method. In this new structure, the bottom region of the thin n-base ...A new 4 H–SiC light triggered thyristor（LTT） with 7-shaped thin n-base doping profile is proposed and simulated using a two-dimensional numerical method. In this new structure, the bottom region of the thin n-base has a graded doping profile to induce an accelerating electric field and compensate for the shortcoming of the double-layer thin n-base structure in transmitting injected holes. In addition, the accelerating electric field can also speed up the transmission of photongenerated carriers during light triggering. As a result, the current gain of the top pnp transistor of the SiC LTT is further increased. According to the TCAD simulations, the turn-on delay time of the SiC LTT decreases by about 91.5% compared with that of previous double-layer thin n-base SiC LTT. The minimum turn-on delay time of the SiC LTT is only 828 ns,when triggered by 100 mW/cm^2 ultraviolet light. Meanwhile, there is only a slight degradation in the forward blocking characteristic.展开更多
In this study,we investigate the self-triggered impulsive control for stochastic delayed multiagent systems with input saturation.We present a novel self-triggered mechanism using a comparison system method.The next t...In this study,we investigate the self-triggered impulsive control for stochastic delayed multiagent systems with input saturation.We present a novel self-triggered mechanism using a comparison system method.The next triggering instant is predicted on the basis of agent dynamics knowledge and data obtained from the last triggering instant without real-time monitoring;thus,Zeno behavior is naturally avoided.By applying this new self-triggering mechanism,we provide some sufficient conditions for the mean-square consensus based on the stochastic differential theory,Lyapunov function theory,and linear matrix inequalities.Finally,we demonstrate the feasibility of our method by presenting numerical simulation results.展开更多
基金Project supported by the National Natural Science Foundation of China(Grant No.51677149)
文摘A new 4 H–SiC light triggered thyristor（LTT） with 7-shaped thin n-base doping profile is proposed and simulated using a two-dimensional numerical method. In this new structure, the bottom region of the thin n-base has a graded doping profile to induce an accelerating electric field and compensate for the shortcoming of the double-layer thin n-base structure in transmitting injected holes. In addition, the accelerating electric field can also speed up the transmission of photongenerated carriers during light triggering. As a result, the current gain of the top pnp transistor of the SiC LTT is further increased. According to the TCAD simulations, the turn-on delay time of the SiC LTT decreases by about 91.5% compared with that of previous double-layer thin n-base SiC LTT. The minimum turn-on delay time of the SiC LTT is only 828 ns,when triggered by 100 mW/cm^2 ultraviolet light. Meanwhile, there is only a slight degradation in the forward blocking characteristic.
基金supported by the National Natural Science Foundation of China(Grant Nos.62433018,62033003,62276214)。
文摘In this study,we investigate the self-triggered impulsive control for stochastic delayed multiagent systems with input saturation.We present a novel self-triggered mechanism using a comparison system method.The next triggering instant is predicted on the basis of agent dynamics knowledge and data obtained from the last triggering instant without real-time monitoring;thus,Zeno behavior is naturally avoided.By applying this new self-triggering mechanism,we provide some sufficient conditions for the mean-square consensus based on the stochastic differential theory,Lyapunov function theory,and linear matrix inequalities.Finally,we demonstrate the feasibility of our method by presenting numerical simulation results.
