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A Readout Circuit of Infrared Focal Plane Array Detector

An array detector and infrared focal plane technology, which is applied in the field of infrared focal plane array detectors, can solve the problems of affecting the imaging effect, reduce the uniformity of the readout circuit, etc., and achieve the effect of increasing the sampling rate

Active Publication Date: 2016-06-29
UNIV OF ELECTRONICS SCI & TECH OF CHINA
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Problems solved by technology

However, since the reference resistance is still affected by the substrate temperature, the integrated output voltage will also be affected by the substrate temperature, which ultimately reduces the uniformity of the readout circuit and affects the imaging effect

Method used

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  • A Readout Circuit of Infrared Focal Plane Array Detector
  • A Readout Circuit of Infrared Focal Plane Array Detector
  • A Readout Circuit of Infrared Focal Plane Array Detector

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Embodiment Construction

[0023] The specific structure of the readout circuit of the infrared focal plane array detector according to the embodiment of the present invention will be described in detail below with reference to the accompanying drawings.

[0024] Such as figure 1 As shown, in an embodiment of the present invention, a readout circuit of an infrared focal plane array detector includes a detection bridge circuit 10 and a substrate temperature compensation circuit 20 .

[0025] The detection bridge circuit 10 is connected to the microbolometer unit in the microbolometer array in the infrared focal plane array detector (in the figure, R s Indicates), and detects the signal generated by the microbolometer unit corresponding to the incident infrared radiation, thereby outputting the detection signal (indicated by I in the figure d express).

[0026] The structure of the detecting bridge circuit 10 may be a structure commonly used for detecting signals of microbolometers. For example, if fi...

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Abstract

The embodiment of the present invention discloses a readout circuit of an infrared focal plane array detector, comprising: a detection bridge circuit connected to a microbolometer unit and detecting a signal generated by the microbolometer unit in response to incident infrared radiation , so as to output the detection signal; the substrate temperature compensation circuit is connected to the detection bridge circuit, and performs temperature compensation on the detection signal output by the detection bridge circuit. In the readout circuit of the infrared focal plane array detector in the embodiment of the present invention, a substrate temperature compensation circuit is added after the detection bridge circuit. This circuit can compensate the influence of the substrate temperature, thus greatly reducing the substrate temperature. The effect of base temperature on the integral output voltage.

Description

technical field [0001] The invention relates to the technical field of infrared focal plane array detectors, in particular to a readout circuit of an infrared focal plane array detector. Background technique [0002] According to Planck's radiation theorem, any object with a temperature higher than absolute zero will have molecular thermal motion inside it, thereby producing infrared radiation with different wavelengths. How to convert this infrared radiation into a measurable signal to detect the objective world has become a goal that human beings are constantly striving for. The infrared focal plane array detector is a product of people's continuous exploration. [0003] The traditional infrared focal plane array has extremely high sensitivity, which is almost close to the background limit. However, when the operating temperature of this kind of photoelectron detector is high, the inherent thermal excitation process increases rapidly, which makes the dark current and nois...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01J5/02G01J5/24
Inventor 吕坚周云刘慧芳
Owner UNIV OF ELECTRONICS SCI & TECH OF CHINA
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