The first ib can really affect the time. The bigger the current, the faster it will be, but it should only be obvious to open, not too obvious to close, and even the improvement of opening speed is minimal! ! ! The time change is mainly due to the input capacitance of the transistor! ! ! Fortunately, triode is a current control device, so it has influence, but it has little influence. As for that load, the smaller the load impedance, the faster it will be, but the specific speed depends on the circuit, because the load resistance is equivalent to the Ro of the equivalent circuit, but it will obviously affect the magnification! ! ! ?

Not fast enough, right? It's obviously your garbage xxxx! ! ! There is also a circuit structure. Based on the * * * collector combination circuit, the reaction speed is obviously improved, or if VMOS is changed, it can be at least one order of magnitude faster! ! ! ?

What the hell is your teacher doing? ! ! Children's homework! ! ! Despise his ancestors for eighteen generations