Open links in new tab
  1. BJT、JFET、MOS管,最基础的3种三极管。在原理上,他们的共性是什 …

    BJT的关键变量是Vbe、Vce、Ic,JFET与MOS管的关键变量都是Vgs、Vds、Id。 由这些具体可以概括出: 三极管需要处理的变量都是3个,即控制量、主通道电压、主通道电流。 做数据拟合的时候,3个变 …

  2. BJT三极管,原理实质上真的是电流控制器件吗?总感觉其实是电压控 …

    Remark 1 :三极管放大电流的本质是什么? 由上述放大过程,我们不难看出BJT是电流控制电流源。 但本质上,BJT仍是电压控制电流源,我们是通过Vbe的微变,来控制Ib电流的指数响应,进而使Ic实 …

  3. 现在大部分电路都使用 MOSFET,为什么还要学 BJT?

    BJT作为输出级时,只要将BJT接成射极跟随器(共集电极组态),单管就很容易做到100欧姆以下的输出电阻,如果是大电流功率输出级,由于电导调制效应的作用,发射结电阻极低,很容易做到几个欧姆 …

  4. BJT与MOSFET的开关速度谁更快?高频特性谁更好? - 知乎

    “在同尺寸下bjt的Cpi当然是占优势的,但是由于这个电容的主要组成是扩散电容,基本无法随工艺演进”。 “在传统工艺(180nm等)下,bjt因为有好的结电容等特性会更加适用于高速器件,也因此有一段时 …

  5. Adding transistor library to LTSpice | All About Circuits

    Jul 27, 2020 · Hi Sam, Find the standard.bjt folder in your LTSpice, I use Microsoft Explorer to display the files This is my Path to the folder, Yours should be the same. Use a text editor to open …

  6. Saturation of a BJT - All About Circuits

    Oct 2, 2011 · So say I have a BJT in which the base-emmiter junction is forward biased and the base-collector junction is reverse biased, for some particular base current. If I now increase the base …

  7. 如何基于datesheet创建简单的spice模型(BJT,MOSFET,JFET)?

    7. 特殊模型元素 对于热模型,如参考内容所述,ROHM的SiC MOSFET模型,需要添加热端口和热阻网络,这在BJT和JFET中虽不常见,但对于高功率应用同样重要。 注意事项 模型的准确性依赖 …

  8. What else I can do improve bjt/mosfet switching time

    Apr 17, 2024 · Hi, i have trouble with bjt and mosfet switching not properly at high frequencies (trying to get to at least 300khz). BJT is 2n2222, Mosfet is IRF540n. Without CB22 capacitor (just had that …

  9. How far can you drive a BJT transistor into saturation before it fails ...

    Jul 10, 2017 · How far can I [over]saturate a BJT biased as a switch without it blowing up? There has to be a limit to the base-emitter current it can handle otherwise a zero resistance would work to turn on …

  10. How does a diode-connected BJT work? | All About Circuits

    Jun 21, 2018 · A BJT is best thought of, in most circumstances, as a voltage-controlled device in the active region. The collector current is controlled by the base-emitter voltage.