Image data transmission circuit of satellite-borne high-resolution CCD (Charge Coupled Device) camera

Abstract

The invention provides an image data transmission circuit of a satellite-borne high-resolution CCD (Charge Coupled Device) camera, relating to the technical field of aerospace optical remotely-sensed imaging technology and solving the problem that the performance of the data transmission circuit is reduced after data transmission because the transmission of image data of a single channel of the traditional satellite-borne CCD remote sensing camera needs coordination of a plurality of differential driver integrated circuits. The image data transmission circuit comprises a high-speed serial differential transmitting circuit at a transmitting end and a high-speed serial differential receiving circuit at a receiving end. The high-speed serial differential transmitting circuit receives image data, line synthesizing signals and data clock output by a satellite-borne high-resolution CCD; the image data, the line synthesizing signals and the data clock are subjected to parallel-serial conversion and differential driving through a high-speed LVDS (Low Voltage Differential Signaling) serializer to output four groups of high-speed serial LVDS signals; and the four groups of LVDS signal flows are transmitted to the high-speed serial differential receiving circuit through an LVDS transmission cable. By means of the image data transmission circuit provided by the invention, the size, the weight and the power consumption of a data transmission link of the satellite-borne high-resolution CCD camera are reduced, and the quality of image transmission is effectively ensured.

Description

technical field [0001] The invention relates to the technical field of aerospace optical remote sensing imaging, in particular to an image data transmission circuit of a spaceborne high-resolution CCD camera. Background technique [0002] With the development of aerospace optical remote sensing imaging technology, the requirements for the ground pixel resolution and width of space-borne CCD remote sensing cameras are constantly increasing. In order to meet the requirements, most space-borne high-resolution CCD remote sensing cameras use high-speed multi-channel parallel output structure. "High speed" is due to the high readout frequency of CCD pixels due to high resolution, resulting in high data rate image data; "multi-channel" contains two meanings: one is to use multiple CCDs to meet the ground width of the camera Splicing; the second is to ensure the complete transfer and output of the signal charge, the CCD uses multiple taps to output in parallel. This will inevitabl...

AI Technical Summary

Problems solved by technology

[0003] The invention solves the problem that the single-channel image data transmission of the existing space-borne CCD remote sensing camera requires the cooperation of multiple differential driver integrated circuits, resulting in large phase deviations in the output signals of the multi-chip differential driver integrated circuits and inaccurate positioning of the data clock in practical applications. , and cause the performance degradation of the data transmission circuit after the data is transmitted, and provide a space-borne high-resolution CCD camera image data transmission circuit

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