Active and passive are two terms commonly used in electronics to describe different types of components or assemblies in a circuit. In circuit design and analysis, it is very important to understand the concepts of active and passive. This article examines the differences between active and active passive electronic components in detail.

The meaning of active passive electronic components

Active components are those that can input energy and convert it into an electrical output, such as transistors, amplifiers, batteries, etc. These components require the input of an external energy source to work, so they are called "active components."

In contrast, active passive electronic components refer to those components that cannot convert energy into electrical output, such as resistors, capacitors, inductors, etc. These components do not require the input of an external energy source to work, so they are called "active passive electronic components."

It should be noted that active components can be built with active passive electronic components, because active components need to use resistors, capacitors, inductors, and other components to achieve their specific functions. In addition, active components can control the behavior of active passive electronic components, such as a transistor that can control the current and voltage of resistors and capacitors in a circuit.

The difference between active and active passive electronic components

1, energy conversion: active components can convert energy into electrical signal output, such as power supplies, amplifiers, transistors, etc. These components require the input of an external energy source to work. In contrast, active passive electronic components can not convert energy into electrical output, they can only affect the resistance, capacitance, inductance and other properties of the circuit.

2, circuit power: Because the active components need the input of external energy to work, they will consume a certain amount of power in the circuit. In contrast, active passive electronic components do not require additional power supply to operate, so they do not have any effect on the power consumption of the circuit.

3, control capability: active components have the ability to control other components, such as a transistor can control the current and voltage of resistors and capacitors in the circuit. In contrast, active passive electronic components cannot control other components.

4, self-excited oscillation: active components may produce self-excited oscillation phenomenon, that is, the energy in the circuit circularly flow and produce frequency. On the contrary, active passive electronic components do not generate self-excited oscillations.

5, dynamic response: active components can respond to changes in external signals, and change the output signal in a certain way. In contrast, active passive electronic components cannot dynamically respond to external signals, and their response depends only on parameters such as resistance, capacitance, and inductance in the circuit.

6, transmission capacity: active components have signal amplification and transmission capabilities, such as amplifiers can enhance the amplitude of the signal. In contrast, active passive electronic components cannot amplify or transmit signals.

In short, active passive electronic components and active passive electronic components are two different types of components in the circuit. Active components need external energy input to work, while active passive electronic components do not. In circuit design and analysis, understanding these two concepts is very important.

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