Based on properties of the noise module on the CCD output signal

general methods to suppress different noise were introduced. Based on area array CCD

the technique of suppressing noise of CCD signal acquisition scheme was presented. Noise suppressing and processing circuits of CCD signal acquisition scheme were designed. These circuits were used in signal acquisition scheme of CCD442A.The SNR of the acquisition system was also calculated by means of integrating spheres. According to the simulation and laboratory radiometric calibration experiment

the results show that the reset noise and the dark current noise are suppressed by the signal acquisition scheme of CCD442A with correlated double sampling(CDS) and black level offset compensation

and the system SNR exceeded 40 dB at medium illumination.