BJT

BJT的音标是[ˈbiːdʒɪt]。基本翻译是“双极晶体管”或“双极型晶体管”。速记技巧是：可以谐音联想为“百鸡啼”（Bjt）或者“必截停”（biten），帮助记忆这个英文单词。

BJT的英文词源是"双极晶体管"（Bipolar Junction Transistor），它是一种电子元件，在电子工程和物理学中广泛应用。

变化形式：BJT可以通过加反向电压或改变其工作状态来改变其导电特性。

相关单词：

1. 放大器（Amplifier）：BJT常用于放大电路中，可以放大微弱的电信号。

2. 饱和（Saturation）：当BJT工作在饱和状态时，其放大倍数会降低，这通常是因为BJT的集电极电流无法再增加而导致的。

3. 放大倍数（Amplification Factor）：BJT的放大倍数是指其输出电压与输入电压的比值。

4. 发射极（Emitter）：BJT的发射极是其基板上的一个电极，负责接收来自基极的信号并将其放大后输出。

5. 基极（Base）：BJT的基极是其最靠近半导体材料的电极，负责接收来自输入信号并将其传递给发射极。

6. 集电极（Collector）：BJT的集电极是另一个电极，负责收集从发射极发射出来的电子并输出放大后的信号。

7. 反向偏置（Reverse Bias）：当BJT的某个电极接上反向电压时，就处于反向偏置状态，这可能会影响BJT的工作特性。

8. 共射放大电路（Common-emitter Amplifier）：共射放大电路是一种基于BJT的放大电路，它可以放大微弱的电信号并具有较高的输入阻抗和输出阻抗。

9. 输出阻抗（Output Impedance）：BJT的输出阻抗是指其输出端口的电阻大小，它会影响信号的传输质量和效率。

10. 输入阻抗（Input Impedance）：BJT的输入阻抗是指其输入端的电阻大小，它决定了信号能够通过BJT时的损耗程度。

常用短语：

1. bipolar junction transistor (BJT)

2. emit current

3. collector current

4. base current

5. forward bias

6. reverse bias

7. saturation current

双语例句：

1. The BJT has a high emitter-base junction resistance. (BJT具有高发射结电阻)

2. The collector current of the BJT is controlled by the base current. (BJT的集电极电流受基极电流控制)

3. Forward bias and reverse bias are both important for the operation of the BJT. (对BJT的工作而言，正向偏压和反向偏压都非常重要)

4. Saturation current determines the maximum output power of the BJT. (饱和电流决定了BJT的最大输出功率)

5. The emitter current of the BJT is affected by the load resistance. (BJT的发射极电流受负载电阻影响)

6. The base current of the BJT determines its switching speed. (BJT的基极电流决定了其开关速度)

7. The BJT is commonly used in analog circuits and power electronics. (BJT在模拟电路和电力电子中常用)

英文小作文：

Title: The Role of BJT in Power Electronics

The bipolar junction transistor (BJT) has played a crucial role in power electronics, where it is commonly used to control large currents and deliver high power efficiently. The BJT, with its ability to operate in the saturation region, allows for high current density and low voltage drops, making it a popular choice for power conversion and management systems.

In power converters, the BJT is used as an active element to control the current flow and deliver power to the load. By adjusting the base current, the collector current can be controlled, allowing for precise regulation of voltage and current. Additionally, the BJT"s fast switching speed allows for high efficiency in power conversion, reducing heat generation and maintaining a stable output voltage.

Moreover, the BJT"s ability to withstand high reverse bias voltages makes it suitable for use in power supplies and other critical applications where high voltage spikes may occur. By properly biasing the BJT, it can effectively block reverse currents, preventing damage to the circuit and ensuring safe operation.

Overall, the BJT has become an essential component in modern electronic systems, providing efficient and reliable control of large currents and delivering high power with low loss. Its versatile nature and high performance make it a popular choice for a wide range of applications in power electronics and beyond.