SMD infrared receiver diode, also known as surface mount infrared receiver diode, is a kind of semiconductor component that is widely used in various fields. With the continuous development of electronic technology, SMD infrared receiver diodes have been widely used in remote control, infrared communication, and other fields. This article will introduce the basic knowledge, working principle, and application of SMD infrared receiver diodes.

Introduction to SMD Infrared Receiver Diode

SMD infrared receiver diode is a kind of semiconductor device that can convert infrared light into electrical signals. It is usually used in the receiver part of the infrared communication system, and can be widely used in remote control, TV remote control, and other fields. The main components of SMD infrared receiver diode include infrared receiving diode, filter, and amplifier circuit. The infrared receiving diode is responsible for converting infrared light into electrical signals, the filter is used to filter out the interference of other light, and the amplifier circuit is used to amplify the electrical signal to the required level.

Working Principle of SMD Infrared Receiver Diode

The working principle of SMD infrared receiver diode is based on the photoelectric effect. When the infrared light is incident on the surface of the infrared receiving diode, the electrons in the semiconductor material will be excited and move, forming an electrical current. The output electrical signal is then amplified by the amplifier circuit and output to the subsequent circuit for processing. The following is a detailed description of the working principle of SMD infrared receiver diode:

1. When the infrared light is incident on the surface of the infrared receiving diode, the photons with energy greater than the band gap of the semiconductor material will be absorbed by the material, causing the electrons to be excited and move from the valence band to the conduction band, forming an electrical current.

2. The output electrical signal is a low-frequency signal, which needs to be amplified by the amplifier circuit to meet the requirements of the subsequent circuit.

3. The amplified electrical signal is then output to the subsequent circuit for processing, such as decoding and control.

Classification and Characteristics of SMD Infrared Receiver Diode

SMD infrared receiver diodes can be divided into many types according to different parameters and applications. The following are some common types and characteristics of SMD infrared receiver diodes:

1. According to the frequency band, SMD infrared receiver diodes can be divided into narrow band and wide band. Narrow band infrared receiver diodes have high selectivity, while wide band infrared receiver diodes have strong anti-interference ability.

2. According to the sensitivity, SMD infrared receiver diodes can be divided into high sensitivity and low sensitivity. High sensitivity infrared receiver diodes have strong receiving ability, while low sensitivity infrared receiver diodes have low power consumption.

3. According to the output form, SMD infrared receiver diodes can be divided into current output and voltage output. Current output has good anti-interference ability, while voltage output has a high output level.

Application of SMD Infrared Receiver Diode

SMD infrared receiver diodes have a wide range of applications, mainly including:

1. Remote control: SMD infrared receiver diodes are widely used in various remote controls, such as TV remote control, air conditioner remote control, and so on.

2. Infrared communication: SMD infrared receiver diodes are used in infrared communication modules, such as wireless keyboard, infrared printer, and so on.

3. Security monitoring: SMD infrared receiver diodes are used in security monitoring systems, such as infrared alarm, infrared obstacle avoidance, and so on.

4. Home automation: SMD infrared receiver diodes are used in home automation systems, such as smart home, intelligent lighting, and so on.

Conclusion

SMD infrared receiver diode is a kind of important semiconductor component with wide application prospects. With the continuous development of electronic technology, the application of SMD infrared receiver diodes will be more extensive. In the future, the development of SMD infrared receiver diodes will focus on improving the performance, reducing the cost, and expanding the application range.