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Integrated satellite-borne ultralong linear array infrared detector front end information acquisition circuit

A technology of infrared detector and acquisition circuit, which is applied in the field of information acquisition of spaceborne infrared cameras, can solve the problems of high bandwidth, high scalability, and high sampling rate, and achieve the effect of high bandwidth, high scalability, and high sampling rate

Inactive Publication Date: 2014-11-12
SHANGHAI INST OF TECHNICAL PHYSICS - CHINESE ACAD OF SCI
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  • Application Information

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Problems solved by technology

[0004] In order to overcome the deficiencies of the above-mentioned prior art, the present invention provides an integrated front-end information acquisition circuit of a space-borne ultra-long-line array infrared detector, focusing on solving the low-cost front-end information acquisition and conditioning of an ultra-long-line array detector in a space-borne infrared camera. Noise, high bandwidth, high sampling rate, multi-channel, small size, light weight, low power consumption, high scalability, high electromagnetic compatibility, high reliability design technical problems

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  • Integrated satellite-borne ultralong linear array infrared detector front end information acquisition circuit
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  • Integrated satellite-borne ultralong linear array infrared detector front end information acquisition circuit

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Embodiment 1

[0027] Example 1 according to Figure 4 The working steps of the front-end information acquisition system of the space-borne 4000 yuan infrared ultra-long line detector are as follows:

[0028] S1. The on-board instrument is powered on, the peripheral drive circuit works, and the 4,000-yuan long-line infrared detector on-board outputs 32 analog signals, which are distributed to 4 front-end unit modules; when the input clocks are at the same frequency and phase, multiple front-end unit modules When working together, all kinds of synchronous signals output must have the same frequency and phase, and the phase deviation should be controlled within half of the main clock cycle;

[0029] S2. When the detector pixel driving signal CP (attached Figure 4 ) when the rising edge arrives, each front-end unit module samples and holds the input 8-way analog signal, performs correlated double-sampling subtraction, and then samples and holds;

[0030] S3: Subtract the background signal of...

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Abstract

The invention discloses an integrated front-end information acquisition circuit for a spaceborne ultralong-linear-array infrared detector. According to the integrated front-end information acquisition circuit for the spaceborne ultralong-linear-array infrared detector, a front-end signal link of the long-linear-array detector is optimized, by adopting the design method that every eight channels serve as one front-end unit module for integration, ultralong-linear-array infrared detector signals can be processed only through the front-end unit modules; front-end analog units are converted into ASIC chips, and each chip can complete the whole processing process of eight infrared detector signals from an analog front end to digital quantification. After the technical scheme is adopted, the spaceborne ultralong-linear-array infrared detector has the advantages that the front-end signals has low noise, the signal bandwidth is large, the signal sampling rate is high, the multiple channels are achieved, the size is small, light weight is achieved, power consumption is low, electromagnetic compatibility is high, and the design is high in reliability. Besides, the resource conflicts between the size of a signal acquisition circuit and a platform of the ultralong-linear-array infrared detector are eliminated, and a technical bottleneck which limits the development of the spaceborne infrared remote sensing technology is eliminated.

Description

technical field [0001] The present invention relates to the technical field of information acquisition of space-borne infrared cameras, in particular to an integrated signal acquisition circuit for space-borne infrared long-line array detectors. Various requirements (low noise, high bandwidth, high sampling rate, multi-channel, small size, light weight, low power consumption, high electromagnetic compatibility, high reliability) coexist, and the ultra-long line infrared detector signal acquisition circuit scale and platform There are conflicting resolutions for resources. Background technique [0002] The core device of the modern infrared imaging system is the focal plane array (focal plane array FPA), including detectors and signal readout circuits. In the current space-borne infrared cameras, the infrared column detectors often have no more than 8 output channels, so the information The acquisition technology is generally designed according to the channel, and each chann...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01J5/10G01J5/02
Inventor 林长青孙胜利李璐芳周双喜王运赵明喻琪超程扬
Owner SHANGHAI INST OF TECHNICAL PHYSICS - CHINESE ACAD OF SCI
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