Detection circuit of infrared focal plane readout circuit

Abstract

The embodiment of the invention discloses a detection circuit of an infrared focal plane readout circuit. The detection circuit comprises a test circuit, a detection circuit body, an integrating circuit and a sampling hold circuit, wherein the test circuit is used for receiving at least one test input signal, the detection circuit body is used for detecting signals of sensitive picture elements, receiving at least one test input signal and generating test signals, the integrating circuit is used for integrating the test signals to obtain integrated signals, and the sampling hold circuit is used for receiving the integrated signals and sampling and outputting the integrated signals. The detection circuit can detect the whole readout circuit before the sensitive picture elements are manufactured through an infrared focal plane array, unqualified circuits are screened out, and the manufacturing cost of the infrared focal plane array is reduced. In the normal work process after the sensitive picture elements are manufactured, it can be guaranteed that normal work of the readout circuit is not affected, and in other words, performance attenuation cannot be caused.

Description

technical field [0001] The invention relates to the technical field of infrared focal plane detectors, in particular to a detection circuit of an infrared focal plane readout circuit. [0002] Background technique [0003] At present, infrared imaging systems are being increasingly widely used in military, space technology, medicine and national economy related fields. The infrared focal plane array component is the core optoelectronic device for obtaining infrared image signals in infrared imaging technology. The infrared focal plane array assembly consists of an infrared detector and an infrared focal plane readout circuit (ROIC: readout integrated circuits). With the continuous expansion of the scale of infrared focal plane array components, the infrared focal plane readout circuit, which is an important part of it, needs to meet higher working performance. [0004] The ROIC circuit is a highly integrated circuit that integrates various functions of the infrared focal ...

AI Technical Summary

Problems solved by technology

However, the analog circuit of the infrared focal plane array readout circuit is difficult to detect before the infrared sensitive unit array is produced, because the circuit is incomplete and the output is a random signal

Although there are some detection methods now, there are some shortcomings in these methods. For example, an existing detection method can only detect whether the circuit structure behind the test circuit can work normally, but cannot detect the detection circuit part.

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