基于CPLD的高精度双积分式A／D转换器设计  

A desingning of high-precision A/D converter by double-integral based on CPLD

作　　者：邓翔宇[1] 赵又新[1] 

机构地区：[1]兰州工业高等专科学校电气工程系,甘肃兰州730050

出　　处：《自动化与仪器仪表》2008年第1期62-65,共4页Automation & Instrumentation

摘　　要：在高精度A/D转换器的设计中,双积分式A/D转换电路具有结构简单,工作线性性好的优点,但其双积分电压的切换控制和高位数计数器的实现一直是一个瓶颈。应用大规模可编程逻辑器件CPLD对积分充放电控制电路和计数器进行设计,同时运用QUARTUSⅡ开发软件对电路进行时序仿真和功能验证,从而实现了高精度、高可靠性、高线性性的A/D转换器。Analog-to-digital converter by double integral has the excellence of configuration-simpleness and linearity-high in course of high-precision AD converter designed, but it is very difficult that the switch-controled of double-integral voltage and high-precision counter Switch-controled of double-integral voltage and high-precision counter are designed by CPLD,and further Timing simulation and fimctional verification of the designed circuits are doing by QuartusⅡ. Accordingly AD converter is realized which is high-precision,high-reliability and high- linearity.

关 键 词：FPGA/CPLD VHDL LED/LCD通用译码器 

分 类 号：TP335.1[自动化与计算机技术—计算机系统结构]