Infrared receiver tube, as a semiconductor device that converts infrared light signals into electrical signals, plays an important role in modern electronic devices. In order to better understand and apply infrared receiver tubes, we need to have a deep understanding of their main technical parameters. These parameters not only determine the performance of the infrared receiver tube, but also directly affect its performance and reliability in various electronic devices.

Maximum reverse operating voltage

The maximum reverse operating voltage refers to the maximum voltage value that the infrared receiver tube can withstand under reverse bias conditions. This parameter directly determines the safety of the infrared receiver tube in the circuit. If the reverse voltage exceeds this value, it may cause damage to the device. Therefore, when selecting an infrared receiver tube, it is necessary to ensure that its maximum reverse operating voltage meets the requirements of the circuit design. Generally speaking, the maximum reverse operating voltage range of an infrared receiver tube is between a few volts and several tens of volts, depending on the model and specifications of the device.

dark current

Dark current refers to the current passing through the PN junction in an infrared receiver tube under non illuminated conditions. This parameter reflects the leakage current of the device in the absence of light. The smaller the dark current, the more stable the performance of the device under no light conditions and the lower the noise. In practical applications, the magnitude of dark current directly affects the sensitivity and signal-to-noise ratio of infrared receiver tubes. Therefore, when selecting an infrared receiver tube, it is advisable to choose devices with lower dark current to improve the overall performance of the system.

Photocurrent

Photocurrent refers to the current passing through the PN junction in an infrared receiver tube under illumination conditions. This parameter directly reflects the device's ability to respond to optical signals. The larger the photocurrent, the more sensitive the device is to light signals and the higher the conversion efficiency. In practical applications, the magnitude of the photocurrent determines the sensitivity of the infrared receiver tube, which is the minimum light signal intensity that the device can detect. Therefore, when selecting an infrared receiver tube, it is necessary to choose a device with appropriate photocurrent according to actual application requirements.

sensitivity

Sensitivity is an important parameter for measuring the response capability of infrared receivers to light signals. It is usually defined as the ratio of the photocurrent generated by a device under specific lighting conditions to the incident light power. The higher the sensitivity, the more sensitive the device is to light signals and can operate normally under lower lighting conditions. In practical applications, the sensitivity directly determines the detection distance and range of the infrared receiver tube. Therefore, when selecting an infrared receiver tube, it is necessary to choose a device with sufficient high sensitivity according to the actual application scenario.

Junction capacitance

Junction capacitance refers to the capacitance at the PN junction of an infrared receiver tube. This parameter will affect the frequency response characteristics of the device and the stability of signal transmission. The smaller the junction capacitance, the better the high-frequency performance of the infrared receiver tube, which can respond more quickly to changes in optical signals and reduce signal distortion. Especially in high-speed data transmission or high-frequency signal processing applications, the size of the junction capacitor is particularly important. A larger junction capacitance may cause signal delay, waveform distortion, and other issues, affecting the overall performance of the system. Therefore, when selecting an infrared receiver tube, if the application requires high frequency response, priority should be given to devices with smaller junction capacitance to ensure accurate signal transmission and stable system operation. Meanwhile, understanding the characteristics of junction capacitance can also help take appropriate measures in circuit design, such as adding filtering circuits or using impedance matching techniques, to further optimize the performance of infrared receiver tubes.