基于PCI和FPGA的信号源设计

Design of Signal Source Based on PCI and FPGA

信号源是航天遥测试验的核心部件,它作为地面设备提供实验过程中所需的各种参数;本信号源采用模块化设计方法,将PCI技术和FPGA技术进行有机结合,对信号源进行了系统方案设计、系统硬件设计和系统软件设计等工作,通过控制FPGA内部ROM的读写、高精度D/A转换器AD9744的转换和多路选择开关ADG1208的选通,产生多路参数可控模拟信号输出;测试结果满足设计要求,已经成功应用于某地面测试设备的自检和检测中。

Signal source is the core parts of the space telemetry experiment, which provides kinds of parameters in the experiment process as the ground equipment. The Signal source made use of the modularized design＇ s scheme and combined the PCI and FPGA technology ef- fectively, which introduced signals source from system scheme design, system hardware design and system software design. The Signal source controlled the internal ROM of FPGA to read and write, conversion of high-precision D/A device AD9744 and gating of multi-chan- nel selector switch ADG1208 gating, produced multi-channel analog signal output. The test result of this signal source satisfied the design demand, and the signal source is successfully applied in self-detection and test of certain acquisition device.