Weak signal reading-out analog signal link structure for short wave infrared detector

An analog signal, short-wave infrared technology, used in electrical radiation detectors, instruments, measuring devices, etc., can solve problems such as difficult to implement, complex structure, difficult to achieve dynamic range, noise suppression requirements, etc. Output swing, the effect of improving dynamic range
CN102818639AInactive Publication Date: 2012-12-12SHANGHAI INST OF TECHNICAL PHYSICS - CHINESE ACAD OF SCI
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
SHANGHAI INST OF TECHNICAL PHYSICS - CHINESE ACAD OF SCI
Publication Date
2012-12-12
Estimated Expiration
Not applicable · inactive patent

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Abstract

The invention discloses an analog signal link circuit for a high-frame frequency reading-out integrated circuit system for collecting and processing weak signals of a short wave infrared detector and belongs to the technical field of integrated circuit design. The analog signal link circuit is characterized in that a reading-out circuit adopts an analog signal link structure. The analog signal link circuit has the concrete scheme that a current source loaded CTIA (capacitance trans-impedance amplifier) structure input stage in a cascade structure is adopted in a unit structure, a CDS (correlated double sampling) module and a charge amplifying module are arranged in a row public structure, and a public output stage adopts a complementary output stage. The CDS structure is integrated in the analog signal link, the serious low-frequency noise of a reading-out circuit of the infrared detector is filtered out, and the technical support is provided for the short wave infrared detector in applications of high resolution ratio and the like.
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Description

technical field

[0001] The invention relates to the technical field of mixed-signal integrated circuits, in particular to an analog signal chain structure for short-wave infrared detector weak signal readout, which is used in short-wave infrared detector array (Infrared Focus Plane Array-IRFPA) systems with photoelectric weak The high frame frequency readout integrated circuit of the signal function can realize the integration, sampling, amplification and output of the weak light response signal of the short-wave infrared detector. Background technique

[0002] The infrared detector array is the core device in the infrared imaging system. An infrared detector array generally consists of two parts: an infrared detector array and a readout circuit. After receiving the incident infrared radiation, the infrared detector generates a photocurrent related to the performance of the incident infrared radiation, and transmits it to the corresponding readout circuit unit. The traditi...

Claims

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