Transistor Who invented the diode?

The inventor of the vacuum triode was the American scientist Lee de Forest (1873 - 1961). In 1904, Fleming invented the first electron tube by adding a plate pole in front of the wire (filament) heated in a vacuum He called this kind of electron tube with two poles diode Using the newly invented electron tube, the current can be rectified, so that the ** receiver or other recording device can work Nowadays, when we turn on an ordinary tube radio, we can easily see the tube with the filament burned red It is the heart of the work of electronic equipment and the starting point of the development of the electronics industry.

On December 23, 1947, at Bell Labs in Murray Hills, New Jersey, USA, three scientists—Dr. Bardeen, Dr. Butchton, and Dr. Shawcleli—were conducting intense and methodical experiments. In a conductor circuit, they are experimenting with using semiconductor transistors to amplify sound signals. The three scientists were amazed to find that a small amount of current passed through a device they invented could control a much larger current flowing through another part, thus creating a magnification effect.

This device is an epoch-making achievement in the history of science and technology - transistor. It was invented on Christmas Eve and has such a huge impact on people's future lives that it is called "a Christmas gift to the world". In addition, the three scientists were jointly awarded the 1956 Nobel Prize in Physics.

The diode is Fleming, and the triode is the American DeFors (special).

Following the advent of the diode, in 1906, the (American) De Forrest (Te) invented the triode.

It was invented by the Americans. The process of invention is that scientists are in the process of researching and improving the diode, so they invented the vacuum triode, and found that the vacuum triode has a larger switching speed, and also has an amplification function, which can better receive the signal of laughter.

United States. The first few scientists added a gate electrode to the diode. This is the prototype of the triode, and later the fiber and in this form of the vertical talk of the Tong Buxing improvement.

It was invented by the Americans. They had been using diodes, and then on top of that they added another tube called a gate.

Both semiconductor diodes and transistors are semiconductor transistor components. The basic principle is to use the unidirectional conduction function of the PN junction to work.

Semiconductor diodes are commonly used as rectifiers, switches, and detection components in circuits. Semiconductor transistors are commonly used as amplification, switching, oscillating elements in circuits.

Semiconductor diodes and transistors are semiconductor components and belong to active components.

Resistors, capacitors, and inductors are passive components.

In 1904, Fleming added a plate pole in front of the wire (filament) heated in a vacuum, thus inventing the first electron tube He called this electron tube with two poles a diode Using the newly invented electron tube, the current can be rectified and the ** receiver or other recording device can work

In 1883, Edison installed a small piece of copper wire near the filament of a vacuum light bulb and discovered that when there is a voltage, there is a mysterious electric current, that is, the Edison effect. In 1904, Fleming of England discovered that the forward voltage has a current, and the reverse voltage has no current, which has unidirectional conductivity and can be used for alternating current rectification.

Be careful, I've done this before. But in the end, it was blocked.

How diodes work.

Forward conduction, reverse non-conductive).

The crystal diode is a p-n junction formed by a p-type semiconductor and an n-type semiconductor, which forms a space charge layer on both sides of its interface and has a self-built electric field. When the applied voltage is not present, due to p-n

The diffusion current caused by the difference in carrier concentration on both sides of the junction and the drift current caused by the self-built electric field are equal and are in an electrically equilibrium state.

When there is a forward voltage bias in the external area, the mutual suppression effect of the external electric field and the self-built electric field increases the diffusion current of the carriers and causes the forward current. (That's why electricity is conducted).

When there is a reverse voltage bias in the outside world, the external electric field and the self-built electric field are further strengthened to form a reverse saturation current that is independent of the reverse bias voltage value within a certain reverse voltage range. (This is the reason why it does not conduct electricity).

The working principle of the transistor (current amplification).

The transistor is a kind of control element, mainly used to control the size of the current, taking the common emitter connection method as an example (the signal is input from the base, output from the collector, and the emitter is grounded), when the base voltage UB has a small change, the base current IB will also have a small change, controlled by the base current IB, the collector current IC will have a big change, the larger the base current IB, the larger the collector current IC, on the contrary, the smaller the base current, the smaller the collector current, That is, the base current controls the change of collector current. But the change in collector current is much greater than the change in base current, and this is the amplification effect of the transistor. ic

The ratio of the amount of change to the amount of change in IB is called the magnification of the transistor ( =δic δib, which indicates the amount of change. The magnification of the transistor is generally in the tens to hundreds of times.

The diode is one p-n junction, the triode is two p-n junctions, the diode has a unidirectional conduction effect, and the triode has an amplification effect.

The diode has a pn junction and the current at both ends is the same size. The transistor has two PN junctions, and the current has an amplification relationship.

Commonalities: they are all semiconductor devices, all of which are made of PN structure;

Differences: The diode, as the name suggests, has two poles and only one pn junction; The transistor has two PN junctions.

1.However, the triode (which contains collector C, emitter E, and base B) is not simply two PNs put together, each.

The thickness of the pole is exquisite;

2.The diode has the characteristics of unidirectional conduction, and is generally used in the fields of rectification, voltage stabilization, and freewheeling; The triode can be lifted and discharged.

Large, oscillating or switching semiconductor electronic devices.