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Active and passive components – basic electronic components in the PCBA process


Electronic components includes active and passive components, which are the building blocks of modern technology. They are used to make everything from cars to computers, and they’re an important part of our everyday lives. They’re the tiny, black pieces that make up your computer and cell phone, and everything in between.

What are electronic components?

What-are-electronic-componentsElectronic components are the building blocks of modern electronics. They provide functionality such as power, control, and communication between devices. Electronic components are made using semiconductor materials, which include silicon and germanium. These materials have thousands of tiny channels called p-n junctions that allow current to flow between transistors.

There are many different types of electronic components, each with its own purpose in an overall system. For example, a power supply is used to provide voltage and current to electronic circuits, while an LED light source provides illumination for a display screen.

What are two types of electronic components?

Electronic components are broken down into two categories: active and passive components. Active components include transistors and diodes, while passive components include resistors and capacitors.
Active components are electronic components that require power to operate. For example, a light switch is an active component because it requires an electrical current to turn on or off. Passive components do not have any internal power source, but they can be powered by other sources like an external battery pack or AC adapter.

What are the active and passive components in the circuit?

The active components are the ones that have an effect on the circuit. In this case, the battery is the active component. The passive components are those that don’t have an effect on the circuit. In this case, none of the other components in this circuit have an effect on it.

What are active and passive components with examples?

Active and passive components are used to describe the relationship between a transducer and its load. Active components have a mechanical or electrical output, while passive components simply take in an electrical signal from a source.

Active Components and symbols

The active component is a component obtained from or depending on the current direction. It is a circuit component that can perform data operation and processing. Active components include all kinds of chips, mainly three kinds : integrated circuits, transistors, diodes.

Integrated circuits

IC-active-componentsIntegrated circuit is a kind of micro electronic device or component. Using a certain process, the transistors, resistors, capacitors, inductors and other components required in a circuit and their wiring are interconnected together, made on a small piece or several small pieces of semiconductor chips or dielectric substrates, and then packaged in a tube shell to become a micro structure with the required circuit functions.


transistor-active-componentTransistors are solid state semiconductor devices used for detection, rectification, amplification, switching, voltage stabilization, signal modulation, etc. Meantime, as a variable current switch, transistor can control output current based on input voltage.


diode-active-componentA diode is an electron tube with two electrodes. It combines two semiconductors with different characteristics,and allow current to pass in one direction (the forward of the diode) and to prevent current from passing in the opposite direction (the reverse).

Other active components include silicon controlled rectifier, valve, BJT, MOSFET, active crystal in semiconductor components, integrated circuit, image tube and display.

Passive Components and symbols

Passive electronic components are the ones that don’t require any power for conducting their job. The most common types of passive electronic components are resistors, capacitors, inductors and transistors.


resistor-passive-componentResistors are used to make the circuit work in a particular way. For example, if you want to turn off an LED, you need to use a resistor to reduce the current flowing through it so that it stops glowing.


Capacitors-passive-componentCapacitors store energy in them and release it slowly over time by turning on a transistor or LED when they’re full. The positive charge is stored in one end while the negative charge is stored in the other end.


Inductors-passive-componentInductors contain a coil of wire that’s wrapped around a magnet when they’re placed inside something like an electric motor or loudspeaker. When electricity passes through this coil, it creates a magnetic field around it which creates movement within whatever object is holding onto it (like a motor).

What’s the feature of active and passive components?

In terms of circuit properties, active components have two basic characteristics:
(1) It also consumes electricity.
(2) In addition to the input signal, there must be an external power supply to work normally.

Passive components have two basic characteristics:
(1) It does not consume electric energy itself, or convert electric energy into other energy in different forms.
(2) It only needs input signal and can work normally without additional power supply.

The most important thing to remember when using active and passive components is that they are not interchangeable. The only way for both to work together is for them to be in the same circuit.

Active components are those that have their own power supply, and their own output. Passive components can be connected directly to an active component but cannot power themselves. Active components, like transistors and diodes, have current flowing through them when they’re in use. Passive components are more like batteries—they store energy but don’t actively produce it themselves.

You can use a passive component to amplify your signal, and if you’re looking for distortion, a passive component will do the trick. If you’re looking for clean sound, you’ll need an active component.

What is the difference between active and passive components?

What-is-the-difference-between-active-and-passive-componentsIf you look at most electronics, they’re either active or passive. While these terms are often used interchangeably, they have different meanings in electronics. The difference between active and passive components is simply the method used to get energy into the device.

Active components require power to function. They include transistors, diodes, and amplifiers. Active components are found in the majority of electronic devices, from computers all the way down to hearing aids.
Passive components don’t need any power to operate—they’re powered by something else (like batteries). In other words, passive components are used when you want to use a device without an external power source such as a rechargeable battery pack or solar panel.

Active and passive components are the key to building an efficient power supply, but they are not the only way. It is important to note that active and passive components are not interchangeable.



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