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Bidirectional diode
The diode is one of the commonly used electronic components. Its characteristic is unidirectional conduction, that is, the current can only flow from one direction of the diode. The function of the diode includes a rectifier circuit, a detection circuit, a voltage stabilizing circuit, and various modulation circuits. It is composed of diodes, and its principles are very simple. It is because of the invention of diodes and other components that our colorful world of electronic information was born. Since the role of diodes is so great, how should we detect this component? In fact, it is very simple. Just use a multimeter to reach the resistance file and measure if the forward resistance is very small and the reverse resistance is very large. This means that the diode is good. For such basic components, we should firmly grasp his principle of action and basic circuit, so as to lay a good foundation for future electronic technology learning.
The current directionality of most diodes is usually called "Rectifying" function. The most common function of a diode is to only allow current to pass in a single direction (called forward bias) and block in the reverse direction (called reverse bias). Therefore, the diode can be thought of as an electronic check valve. However, in fact, the diode does not show such perfect on and off directionality, but rather more complex nonlinear electronic characteristics-which is determined by the specific type of diode technology. In addition to being used as a switch, the diode has many other functions.
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