A kind of ccd signal simulator and simulation method

Abstract

The invention discloses a CCD (Charge Coupled Device) signal simulator used for simulating a CCD chip to generate an output signal. The CCD signal simulator comprises a control module, a memory module, a pixel signal output circuit and a control signal output circuit, wherein the control module judges an input control command and receives input image data or generates output signals of both the pixel signal output circuit and the control signal output circuit according to the control command; the pixel signal output circuit utilizes an input signal to output a pixel signal; and the control signal output circuit outputs a line synchronization signal and a clock signal. Meanwhile, the invention provides a simulation method adopting the CCD signal simulator. The CCD signal simulator can replace a real CCD chip and simulate the CCD chip to generate electrical signals, and satisfies the requirement on CCD signals in the test process of a satellite camera video electronic system without the need of the CCD chip.

Description

technical field [0001] The invention belongs to the technical field of aerospace remote sensors, and relates to a CCD signal simulator and a simulation method, which can be used for testing the video electronic system of aerospace cameras. Background technique [0002] CCD chip is the key device in satellite camera video electronic system. In the satellite camera video electronic system, the CCD chip receives the optical signal from the optical system, completes the conversion of the optical signal to the electrical signal, and converts the converted electrical signal into a digital signal after correlated double sampling, A / D conversion, etc. Send it to the digital signal processor to complete the image signal processing and output imaging. The block diagram of the satellite camera video electronic system is as follows: figure 1 shown. Due to the high requirements of CCD on the application environment, during the testing process of the video electronic system, the expens...

AI Technical Summary

Problems solved by technology

Due to the high requirements of CCD on the application environment, during the testing process of the video electronic system, the expensive CCD chip may be damaged, which will cause economic losses and affect the subsequent testing of the digital signal processing circuit, thereby affecting the camera. overall development cycle

Increased R&D costs for satellite camera video electronics systems

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