Characteristics of the Noise of the On-Chip Amplifier Within A CCD for Astronomy and the Depression Methods

During the astronomical observation carried out with a CCD detector, the noise of the on-chip MOSFET amplifier is the main noise sources of the CCD at a very low light level, its characteristics are summarized in Section 2, the noise depressing effects of the three typical methods for processing the readout signals for the CCD are analysed in Section 3, a new method for the signal processing for depressing the read-out noise of the CCD, which is called the "Correlated Milti-Sample", is proposed in section 4 and the experimental results of four samples for depressing the read-out noise of the CCDare presented in the last Section.