A Charged Coupled Device (CCD) Controller/Signal Processor Based on a Digital Signal Processor

一种新型的模拟信号处理器模块， 电荷耦合器件（CCD）的输出将被建立。 单位 是围绕一个非常快速的16位模数转换器设计的 和数字信号处理器（DSP）集成电路。 通过 在CCD输出端采集多个波形样本 可以增加读出的动态范围 并应用最佳滤波技术来降低读出 噪声 DSP将存储样本并进行数字处理 他们得出一个单一的数字发送到主机， 从而减轻主机上的负载。 DSP还将 产生驱动CCD的时钟波形，以及 执行其他时间紧迫的任务，例如 发动机和百叶窗 新的电子系统比 以前的设计，也能够高速读出 CCD用于视场查找或高速测光。 我们计划 实验各种方法来改善读出噪声， 使用多个CCD的大信号处理能力。 的 该项目预计将持续约两年，涉及， 除了首席研究员，一名电气工程师， 一个电子技师，一个研究生

A new type of analog signal processor module for digitizing the output of charge-coupled devices (CCDs) will be built. The unit is designed around a very fast 16-bit analog-to-digital converter and a digital signal processor (DSP) integrated circuit. By taking multiple samples of the waveform at the output of the CCD it will be possible to increase the dynamic range of the readout and to apply optimal filtering techniques to lower the readout noise. The DSP will store the samples and numerically process them to derive a single number to send to the host computer, thereby relieving the load on the host. The DSP will also generate the clocking waveforms to drive the CCD, as well as carry out other time-critical tasks such as the operation of motors and shutters. The new electronic system is simpler than previous designs, and is also capable of high speed readouts of the CCD for field finding or high-speed photometry. We plan to experiment with various methods for improving readout noise and large signal handling capabilities using several CCDs. The project is expected to last about two years and involve, in addition to the Principal Investigator, an electrical engineer, an electronics technician, and a graduate student.