Synchronous Control Method of Multiple Groups of tdi CMOS Imaging System

Abstract

A synchronous control method for multiple groups of TDI CMOS imaging systems relates to a synchronous control method for multiple groups of TDI CMOS imaging systems based on aerospace applications, and solves the problem of sampling metastable states in existing imaging systems during imaging control. The invention uses a single low-frequency The crystal oscillator is sent to each imaging unit through the clock divider and then the external clock frequency multiplier and jitter cleaner respectively; by testing the metastable state area of ​​sampling, by adjusting the rise of the clock divider reset signal edge, so as to ensure the robustness of control signal sampling. The low-frequency clock signal is used for dejittering and frequency multiplication near the imaging controller to avoid the amplitude attenuation and jitter increase of the high-frequency clock, thereby ensuring the stable and reliable reception of high-speed serial data; by testing the metastable area of ​​sampling, by adjusting The clock divider resets the rising edge of the signal, thereby ensuring the robustness of the control signal sampling, and the detector can work stably 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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