Infrared focal plane array and infrared sensor reading circuit

Abstract

An infrared sensor reading circuit disclosed by the present invention comprises a first transistor, a second transistor, a sensor, an integrating capacitor and a hysteresis comparator. The source of the first transistor is connected with a power supply, the drain of the first transistor is connected with the first end of the sensor, and the grid of the first transistor is connected with the outputend of the hysteresis comparator. The source electrode of the second transistor is grounded, the drain electrode of the second transistor is connected with the first end of the sensor, and the grid electrode of the second transistor is connected with the output end of the hysteresis comparator. The second end of the sensor is respectively connected with the first end of the integrating capacitorand the input end of the hysteresis comparator, the first end of the integrating capacitor is connected with the input end of the hysteresis comparator, and the second end of the integrating capacitoris grounded. The first transistor and the second transistor play a switching role, the resistance is far less than that of the sensor, only the sensor consumes energy, and the energy utilization rateof the sensor is close to 100%, so that the energy utilization rate is improved. The invention further provides the infrared focal plane array with the above advantages.

Description

technical field [0001] The present application relates to the technical field of infrared sensors, in particular to an infrared focal plane array and an infrared sensor readout circuit. Background technique [0002] Infrared imaging technology has important applications in the fields of industry, electric power, medicine, environmental monitoring, security, forest fire prevention and so on. The core component of the infrared imaging system, the infrared focal plane array, includes an uncooled infrared focal plane detector and a readout circuit. The function of the readout circuit is to complete the conversion, amplification and transmission of sensor signals. [0003] The circuit diagram of the existing readout circuit is shown in figure 1 As shown, including resistor Ref, two MOS (metal oxide semiconductor, MOS for short) tubes, sensors, and power input from one end of resistor Ref, two MOS tubes are equivalent to current sources in this circuit, two MOS tubes and resistor...

AI Technical Summary

Problems solved by technology

[0003] The circuit diagram of the existing readout circuit is shown in figure 1 As shown, including resistor Ref, two MOS (metal oxide semiconductor, MOS for short) tubes, sensors, and power input from one end of resistor Ref, two MOS tubes are equivalent to current sources in this circuit, two MOS tubes and resistor Ref It will consume a lot of power, resulting in low energy utilization at the sensor, below 50%

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