行间转移CCD数字系统的VHDL设计

A VHDL Design of Digital System for an Interline-Transfer CCD

首先分析了KAI-04022行间转移面阵CCD以及模拟前端信号处理器AD9845B的工作原理及控制要求;重点介绍了在QUARTUS 8.0的开发环境下,使用VHDL语言与FPGA器件对此图像采集系统的数字控制部分进行的分析与设计过程,并给出了系统仿真波形图。最后对硬件电路进行了测试,给出了主要输出端口的实测波形,并对仿真与实测波形进行了比较与分析。

This paper presents a new digital system designed with the VHDL and Quartus Ⅱ,which is used to control and drive an interline-transfer CCD imaging system.We first introduce and analyze the principle of the CCD imager KAI-04022 and that of the analog front-end processor AD9845B.We subsequently give a design of the digital system with a 2-layer 4-module VHDL program and with the digital control based on an FPGA（Altera EP2C35F672）.The design is under the development environment of QuartusⅡ 8.0.This paper provides simulated waveforms as well as measured waveforms in an operational test.In addition,we compare and analyze the simulation and test results.We conclude that our design meets requirements for the CCD camera.