Semi Physics|教育線上App不用買-HotApp4Game

This App is meant as a supplement to chapters on Semiconductor Physics, PN Junctions, NPN and PNP transistors.It helps to show some concepts that maybe difficult to comprehend from a static picture in a textbook.The interface allows you to play the images at a speed from 1sec per image to 29 sec per image or you can step forward and backward through the images.There are 4 separate image sequences that are selected by a selector bar on the lower right of the control panel.SEMI(Note: This is the same image set in Semi Physics 1.0 with a few images added)It shows the creation of both the valence and conduction energy bands.Electron-hole pair creation and electron transport in both the valence and conduction energy bands.How N-type and P-type silicon is created and the associated change to the energy bands. Also shows the Fermi distribution function and carrier density graphs and how they change with doping and temperature.Note: These are the same images that were in the SemiPhysics App version 1.0DIODE(Note: This is the same image set in PNjunction 1.0 that I discontinued)It shows the creation of the depletion layer, electric field, charge density and built-in voltage from an abrupt PN junction with equal doping in both N and P side with a neutral bias. An applied reverse bias shows the increased depletion layer, electric field, charge density and built-in voltage and equilibrium current.An applied forward bias shows the decreased depletion layer, electric field, charge density and built-in voltage and significant forward bias current.Note: These are the same images that were in the PNjunction App version 1.0NPNAn NPN transistor in common-base configuration is first shown in an equilibrium state. Then in the normal active mode with the emitter-base junction forward biased and the base-collector junction reverse biased. It then shows the flow of electrons from the emitter to the collector along with the very small amount of base current. This demonstrates how the emitter to collector current is controlled by the amount of forward bias on the emitter-base junction.PNPA PNP transistor in common-base configuration is first shown in an equilibrium state. Then it in the normal active mode with the emitter-base junction forward biased and the base-collector junction reverse biased. It then shows the flow of holes from the emitter to the collector along with the very small amount of base current. This demonstrates how the emitter to collector current is controlled by the amount of forward bias on the emitter-base junction.