Synchronous control method for multiple TDI CMOS imaging systems

Abstract

The invention provides a synchronous control method for multiple TDI CMOS imaging systems, relates to an aerospace application-based synchronous control method for multiple TDI CMOS imaging systems, and aims at solving the problem that when existing imaging systems are subjected to imaging control, the sampling metastate exists. According to the method, a single low-frequency crystal oscillator passes through a clock divider, then is fed into external clock frequency multipliers and jitter clearers and finally is fed into various imaging units; and by testing the metastate area of sampling andadjusting the rising edge of a clock frequency divider reset signal, the robustness of control signal sampling is guaranteed; by conducting dejitter and frequency multiplication on low-frequency clock signals near imaging controllers, increase of amplitude attenuation and jitter of high-frequency clocks is avoided, and then stable and reliable receiving of high-speed serial data is guaranteed; and by testing the metastate area of sampling and adjusting the rising edge of the clock frequency divider reset signal, the robustness of control signal sampling is guaranteed, and a detector can always stably work under various temperature conditions.

Description

technical field [0001] The invention relates to a synchronous control method of a multi-group CMOS imaging system, in particular to a synchronous control method of a multi-group TDI CMOS imaging system based on aerospace applications. Background technique [0002] For multi-group imaging systems, if each part adopts independent clocks for imaging control, there may be beat frequency interference among the imaging systems of each group, resulting in interference fringes on the image; for CMOS imaging systems using high-speed serial data transmission interfaces, for The signal integrity and jitter requirements of high-frequency data clocks are high. In order to avoid the impact of beat frequency, when the same synchronous clock is used for all parts, it is easy to cause high-frequency signals to attenuate the signal amplitude and increase jitter after passing through the transmission cable; CMOS detectors for aerospace applications , The phase-locked loop is canceled in the ch...

AI Technical Summary

Problems solved by technology

[0003] The present invention provides a synchronous control method for multiple groups of TDI CMOS imaging systems in order to solve the problem of sampling metastable state existing in the imaging control of the existing imaging system

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