TCL HCD868電話座機拆解

redhill · 发表于 2021-3-13 18:51:16

Zener diode

A Zener diode transfers currentforward and backward, while traditional diodes are only capable of transferringcurrent forward. Many different electronic systems use Zener diodes to controltheir circuit’s voltage levels. While there are several ways of doing this,Zener diodes provide efficient voltage regulation without damaging the diodeitself.

How Zener Diodes Work
For the most part, a Zener diode acts like a regular diode as current moves ina forward direction in its circuit. However, when a large enough voltage isapplied to the diode in the reverse direction, it travels against the currentfrom the output to the input. Generally, this produces a current build-up thateventually damages the diode. However, Zener diodes can limit the amount ofcurrent that passes through them so that the voltage going backward limits thevoltage going forward.

Applications
Zener diodes are used in a number of electronic devices but are exclusivelyused to control voltage levels within an electrical circuit. They areespecially used in power supplies where alternating current is converted intodirect current. These types of power supplies typically transfer very largevoltages and must limit the voltage before it is transferred to an electronicdevice. These devices are often referred to as rectifiers and either a Zenerdiode or several transistors can control them. However, in the case of one-chipregulators, transistors are too large and a single Zener diode can perform thesame function.

Advantages
Zener diodes are very small and can be integrated into virtually any electronicdevice, especially small circuits that cannot accommodate other forms ofvoltage regulation technology. Zener diodes are also relatively inexpensive andare compatible with most other systems, making them the preferred voltageregulation device.

Disadvantages
Zener diodes cancel out voltages by applying even larger voltages in thereverse direction, wasting electricity in the process. Additionally, Zenerdiodes have a relatively poor regulation ratio and are generally not as good astransistors.

Clarence Melvin Zener (December 1, 1905 – July 2, 1993) was the American physicist who first (1934) described the property concerning the breakdown of electrical insulators. These findings were later exploited by Bell Labs in the development of the Zener diode, which was duly named after him. Zener was a theoretical physicist with a background in mathematics who conducted research in a wide range of subjects including: superconductivity, metallurgy, ferromagnetism, elasticity, fracture mechanics, diffusion, and geometric programming.

阳光使者 · 发表于 2021-3-13 18:54:26

现在国产电话机更精简了.....

白发老头 · 发表于 2021-3-13 19:01:28

是出口的，尽是圈圈弯弯的，不认识。

jbm1 · 发表于 2021-3-13 19:53:45

擦！全是“硬该历史”以为走错片场了:lol:

加旋 · 发表于 2021-3-13 21:49:06

TCL座机做工太一般了:titter:

温力口 · 发表于 2021-3-13 22:12:20

谢谢分享。。。。。

大呆 · 发表于 2021-3-13 22:58:36

英语写了不是很好，20分吧！

mhtlov · 发表于 2021-3-14 00:28:08

质量不错啊

玛德陛下 · 发表于 2021-3-14 10:10:21

为什么写英文呢，看不懂啊

qylxx · 发表于 2021-3-14 10:26:27

看上去也是很山的样子

msoushi · 发表于 2021-3-14 13:05:42

翻译来了:lol:
齐纳二极管

齐纳二极管可以向前和向后传输电流，而传统的二极管只能向前传输电流。许多不同的电子系统都使用齐纳二极管来控制其电路的电压水平。虽然有几种方法可以做到这一点，但齐纳二极管可以在不损坏二极管本身的情况下提供有效的电压调节。

齐纳二极管的工作原理
在大多数情况下，齐纳二极管的作用就像普通二极管一样，当电流在其电路中沿正向移动时。然而，当一个足够大的电压被施加到二极管的反方向，它逆着电流从输出到输入。一般来说，这将产生一个电流积聚，最终损坏二极管。然而，齐纳二极管可以限制通过它们的电流，使反向的电压限制了前进的电压。

应用范围
齐纳二极管在许多电子设备中使用，但专门用于控制电路中的电压水平。它们特别用于将交流电转换为间接电的电源中。这些类型的电源通常传输非常大的电压，并且必须在电压传输到电子设备之前对其进行限制。这些器件通常被称为整流器，一个齐纳二极管或几个晶体管都可以控制它们。然而，在单芯片稳压器的情况下，晶体管太大，一个齐纳二极管就可以完成同样的功能。

优点
齐纳二极管的体积非常小，几乎可以集成到任何电子设备中，特别是不能容纳其他形式的电压调节技术的小电路。齐纳二极管的价格也相对便宜，并且与大多数其他系统兼容，使其成为首选的电压调节器件。

缺点
齐纳二极管通过在反方向施加更大的电压来抵消电压，在这个过程中浪费了电能。此外，齐纳二极管的调节比相对较差，一般不如晶体管好。

克拉伦斯-梅尔文-齐纳(Clarence Melvin Zener，1905年12月1日-1993年7月2日)是美国物理学家，他首先(1934年)描述了有关电绝缘体击穿的特性。这些发现后来被贝尔实验室利用，开发出齐纳二极管，并以他的名字命名。齐纳是一位具有数学背景的理论物理学家，他进行了广泛的研究，包括：超导、冶金、铁磁、弹性、断裂力学、扩散和几何编程。