What is the function of electronic components?
Release Date:
2023-01-21 12:00
Source:
Electronic components What is their function?
With the development of science and technology, the types of electronic components are increasing, approximately 10,000. According to the different functions in the circuit, commonly used electronic components can be roughly divided into 17 categories and 56 series. Any electronic device or electronic equipment is composed of electronic components, which play different roles in the circuit and work together to complete specific "tasks". In short, electronic components play ten major roles in the circuit.

1. Voltage exchange
Voltage exchange here has three meanings. First, high and low voltage conversion. Converting high AC or DC voltage to the required low voltage, or converting low AC or DC low voltage to the required high voltage. Usually, the conversion between high and low AC voltage requires a transformer, while the conversion between high and low DC voltage requires complex electronic circuits. Another is AC and DC conversion, that is, the DC voltage required by the circuit (referred to as the circuit) is converted from the mains 220V through rectification and filtering, or the DC voltage is converted into AC voltage through an inverter, for example, in car repair, the DC 12V of the battery is converted into AC 220V. The third is voltage stabilization. Voltage regulators or voltage stabilizing circuits are used to change unstable DC or AC voltage into a very stable voltage. The former is called DC voltage regulation, and the latter is called AC voltage regulation.
2. Generate AC signals that meet specific requirements
Whether in broadcasting and television technology, communication technology, or microcomputer technology, AC signals with amplitudes or frequencies that meet specific requirements are often needed, such as 20~2000Hz audio signals, 525~1620kHz high-frequency signals, 48~958MHz ultra-high frequency or very high frequency signals, pulse signals of different frequencies and waveforms. These signals are generated by various types of oscillating circuits.
3. Signal amplification
The radio signals received by the radio and the UHF or VHF television signals are very weak. In order to obtain bright broadcast sound and clear television images, we must use amplifier circuits to amplify the weak broadcast signals and television signals from the air. Various types of amplifier circuits are common in electronic technology work.
4. Signal conversion
In the application of electronic technology, it is sometimes necessary to transform the amplitude, frequency, and phase of the signal to meet certain requirements, which is usually called amplitude modulation, frequency modulation, and phase modulation. The medium-wave radio you usually listen to is an AM signal; the FM radio you listen to is an FM signal; the television broadcast you watch, where the image part is an AM signal, and the sound part is an FM signal; phase modulation technology is widely used in satellite television broadcasting. Correspondingly, it is sometimes necessary to reverse the amplitude, frequency, or phase of the signal, that is, to "recover" the original "surface" of the AM, FM, or PM signal, which is technically referred to as demodulation. Usually, the demodulation of an AM signal is called detection, the demodulation of an FM signal is called frequency discrimination, and the demodulation of a phase-modulated signal is called phase detection or phase detection.
5. On/Off or size control
In actual production and life, it is common to control some physical quantities (or phenomena) through circuits. Generally, there are two types of control: one is switch control, and the other is size or intensity control. For example, the connection and disconnection of the circuit, the generation and stop of the signal, the running and interruption of the program, etc., all belong to the connection and interruption control of physical quantities; the increase or decrease of the signal frequency, the increase or decrease of the volume, and the brightness or darkness of the TV picture all belong to size or intensity control.
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