2019年2月17日 · Figure 1 illustrates the construction, symbols, and nomenclature for the two types of Bipolar Junction Transistor (BJTs). Notice that there are the two PN junctions in a BJT: the emitter-base junction (EBJ) and the collector-base junction (CBJ).

2023年2月4日 · 首先我们分析EBJ的电流，因为EBJ是正向偏置，从发射极到基极的电路由两部分组成，一部分是从集电极发射到基极的电子，另一部分是从基极发射到集电极的空穴，之后我们可以看到，空穴电流占比较低，电子电流占主导地位（发射极掺杂浓度高，基极掺杂浓度 ...

集極電流 iC 的大小與 vCB無關 只要集極電位相對於基極是正的 飽和電流(IS) – 與W 成反比,與EBJ區成正比 通常介於10-12 與10-18A之間 也被稱為比例電流

Figure 7.5 depicts a simplified PNP transistor. — Emitter (E): heavily doped p-type region. — Base (B): lightly doped n-type region. — Collector (C): heavily doped p-type region. — Two diodes connected in series with opposite directions. ∗ EBJ: Emitter-Base junction. ∗ …

Hence, there are two junctions in these transistors, the emitter-base junction (EBJ), and the collector base junction (CBJ). Figure 4: Simpli ed structures of the npn and pnp transistors (Courtesy of Sedra and Smith).

two useful p-n junction modes, and two p-n junctions for each BJT (i.e., CBJ and EBJ), a BJT can be in one of four modes! MODE EBJ CBJ

* The junction between the n-type collector and the p-type base is called the Collector-Base Junction (CBJ). cathode is the collector. * The junction between the n-type emitter and the p-type base is called the Emitter-Base Junction (EBJ). Note for the EBJ, the anode is the base, and the cathode is the emitter.

饱和模式（EBJ 正向偏置；CBJ 正向偏置） 只要 CBJ 反向偏置，双极结型晶体管 (BJT) 就会保持活动模式； 也就是说，只要 V2 > 0，穿过基极扩散的电子一旦到达 CBJ 就会被扫入集电极。

Avalanche breakdown: avalanche multiplication mechanism takes place at CBJ or EBJ Base punch‐through effect: the base width reduces to zero at high CBJ reverse bias

Regions: 1.Active region: if the BEJ (base-emitter junction) is forward biased and the BCJ (base-collector junction) is reverse biased. 2.Saturation region: if the BEJ is forward biased and the BCJ is forward biased. 3.Reverse region (rarely used): if the BEJ is reverse biased and the BCJ is forward biased. 4.Cut-O : if the BEJ is reverse biased...