Understanding of the image of the transistor

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To understand the effect of transistor amplification, remember that energy will not be generated for no reason, so the transistor will not produce energy ,.

However, the most amazing thing about the transistor is that it can control large current through small current.

The principle of amplification is that large static DC is controlled through small AC input.

Suppose the transistor is a dam. The strange thing about the dam is that there are two valves, one is a large valve and the other is a small valve. A small valve can be opened by manpower. A large valve is heavy and cannot be opened by manpower. It can only be opened by the hydraulic power of a small valve.

Therefore, the common workflow is that when people open small valves, a small flow of water will flow out, which will affect the switch of the valve, and the valve will be opened, the surging rivers flow down.

If you keep changing the opening size of a small valve, the valve will also change accordingly. If you can change the valve strictly in proportion, then the perfect control will be completed.

Here, Ube is a small water flow, UCE is a large water flow, and a person is an input signal. Of course, if we compare the water flow to the current, it will be more accurate, because the transistor is a current control element after all.

If one day, the weather is very dry, the river is gone, that is, the big water flow is empty. The Administrator opened the small valve at this time. Although the small valve still impacted the large valve and opened it, because there was no water flow, there was no water flow. This is the cutoff area in the transistor.

The saturation zone is the same, because at this time the river reaches a large degree, the size of the valve opened by the Administrator is useless. If you do not open the valve, the water will be washed out by yourself. This is the breakdown of the diode.

In a simulated circuit, the valve is generally semi-open, and the output flow is determined by controlling its opening size. When there is no signal, the water flow will flow, so when it is not working, there will also be power consumption.

In the digital circuit, the valve is in the on or off two states. When not working, the valve is completely closed with no power consumption