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- BJT、JFET、MOS管，最基础的3种三极管。在原理上，他们的共性是什么，个性又是什么？ - 知乎
BJT中恒流的实现：以npn三极管为例，发射结负责发射电子，集电结负责收集电子，电流被拆分成了两个相对独立的过程；只发不收，只收不发，都是没有电流的。Vbe控制发射结，即控制电子的发射量；Vce控制集电结，即控制电子的收集量。
- 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制的。？ - 知乎
都2022年了，「bjt三极管是电流控制器件」的观点，还在流行。不仅掩盖了三极管有趣的灵魂，还遮蔽了半导体中磅礴的力量。 是时候，进行一次彻底的、全面的平反了。 一、都说是「小电流控制大电流」 把一个小电流放大成一个大电流，是bjt三极管的看家本领。
- 现在大部分电路都使用 MOS，为什么还要学 BJT？ - 知乎
大家没发现BJT电路分析最大的困难在哪里吗？ 1 你没法干净的割裂不同级！ 这导致初学时BJT电路非常的难以分析，一个简单点电流镜就会由于基级寄生电流（没错，我管他叫寄生电流，因为不论如何BJT都是通过压控结偏置定电流，复合电流是寄生）导致分析的困难，为了抑制这些东西还要搞beta helper。
- 3-stage BJT amplifier - All About Circuits
I'm trying to build a 3-stage BJT amplifier to amplify the signal from an electret microphone and drive a 3W, 8Ω speaker I'm kinda stuck and need some help My idea is to use the first two stages as common-base amplifiers, each with a gain of around 15 5 The mic outputs about 20 mV, and I
- BJT Q-Point - All About Circuits
BJT Q-Point Thread starter SamR; Start date Aug 13, 2022; Search Forums; New Posts; Thread Starter SamR
- Miller Effect on a BJT - All About Circuits
Hi, I'm readting The Art Of Electronics and I have a question about the Miller Effect The theorem says that the capacitance between the base and collector looks like a bigger one between base and ground due to the voltage amplification at the collector, so the equivalent capacitance is
- amplifying DC signal - BJT? | All About Circuits
I want to use a BJT for amplifying DC dignal, say a signal of 10mv originating from a sensor like PT100, here both the sensor and the transitor is powered by a single dc supply A coupling capacitor wouldn't help as i want to amplify steady state dc signals It is very easy to amplify dc
- BJT - Common Emitter - exact RE calculation - All About Circuits
Hi there, in a common emitter circuit, I calculate the RE ( Emitter Resistor) and RC with Ib = Ic BF R3 = (Vcc - Uce - Ure) Ic RE = Ure (Ic + Ib) But these Formulas do not consider the internal resistors rb and rc A comparison with Qucs and LTSpice confirms this ,The BJT Model in
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