The difference between active components and passive components
(function/working characteristics and changes are different)
What are the active components and passive components? What are the differences between active and passive components? Let's take a look below.
1. Active components
Active component: a component of a circuit component that can perform data operations and processing. Including all kinds of wafers, such as active crystals in semiconductor devices, integrated circuits, image tubes, and displays are all active devices.
Active components are laymen's terms and should be called active components. The basic definition of active devices If electronic components work, there is a power supply inside, then such devices are called active devices.
An active component is an electronic component that has a gain or depends on the direction of the current flow. In fact, it refers to electronic parts other than resistance, capacitance, and inductance (they are called "passive components"). Examples of active components are transistors, thyristors, vacuum tubes, etc.
2. Passive components
Passive components: Compared with active components, it refers to the circuit components that do not affect the basic characteristics of the signal, but only pass the signal without modification. The most common ones are resistors, capacitors, inductors, ceramic oscillators, crystal oscillators, transformers, etc.
Passive components are what the Taiwanese electronics industry calls certain electronic components, which is different from active components). In mainland China, they are called passive devices and active devices. At present, passive components (capacitors, resistors, inductors) and active components (integrated circuits) are also commonly used in China.
Third, the difference between active components and passive components
1. Different working characteristics
Active components: need the power to display their characteristics.
Passive components: It does not consume electrical energy itself, or convert electrical energy into other energy in different forms, and only needs to input signals, and it can work normally without external power supply.
2. Different functions
Active components: generally used for signal amplification and transformation.
Passive components: used for signal transmission or "signal amplification" through directionality.
3. Different changes
Active components: When the voltage changes, the resistance, and impedance will change.
Passive components: When the voltage changes, neither resistance nor impedance changes.
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