天文CCD片内放大器的噪声特性及其抑制方法

分析了低光度天文应用时CCD器件的主要噪声源的噪声特性和三种典型CCD读出信号处理方式的噪声抑制效果;提出了天文CCD读出信号的相关多次采样(CMS)处理新方法,并分析了四次采样抑制CCD读出噪声的实验结果。

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.