FSA乘法器的设计与实现

鉴于有限状态机对于具有逻辑顺序和时序规律的事件能有清晰的描述,对传统乘法器设计进行改进。提出一种快速、低功耗的FSA乘法器设计。该设计使用VHDL语言进行实现,并在QuartusⅡ上通过了仿真。仿真结果表明基于状态机的与基于逻辑电路的设计相比,在运算过程中产生的功耗以及运算速度上有较大的改善。     

“Quartus scale” of hot-rolled strip steels and its formation mechanism

The types and growth of various oxide scales formed during the different phases of the production of hotrolled strip steel products are reviewed. Similarities and differences between the ＂tertiary scale＂ on the surface of carbon steels at high temperatures and the oxide scale on pure iron are compared. The micro-structural features of the ＂final oxide scale＂ on the surface of strip steels at room temperature as well as the relationship between these features and the position of the steel coil （plate） and the subsequent processes of recoiling, temper rolling and trimming, etc. are summarized. The actual oxide scales retained on the commercial hot-rolled strip steels at room temperature have been proposed to define as ＂ quartus scale＂ for the first time. The micro-structural development and phase transformation of the initial ＂tertiary scale＂ during and after cooling and coiling are described. The reasons for the ＂tertiary scale＂ on carbon steels differing from the oxide scale formed on pure iron, and the major influencing factors in the formation of various types of ＂quartus scales＂ are analyzed from both thermodynamic and dynamic viewpoints. The development mechanism of ＂ quartus scales＂ is discussed and the potential effects of the ＂ quartus scale＂ state （thickness, constitution, structure and defects）, on the rusting and pickling properties of commercial hot-rolled strip steel, as well as on the mechanical properties of oxide scales are analyzed.     

基于FPGA的VGA图像显示系统的设计与实现

文中依据VGA接口的设计原理,提出一种基于DE2-70的VGA图像显示控制系统,与传统的VGA控制系统相比,由于FPGA体积小,可重构,因此很适合小型便携式系统设备的设计,给出了QuartusⅡ9.1的仿真结果。在硬件平台上实现了VGA的汉字显示和彩条信号的显示。实验结果表明:由FPGA作为处理器来控制VGA图像的和汉字的显示,能够达到预期的效果,克服传统VGA控制系统的弊端。     

数据采集系统设计

本系统设计主要实现的功能是：通过ADC0809模/数转换器对8通道的模拟信号进行循环测量。将测得的数据进行保存、处理和显示。数据处理功能上实现了对采集数据进行两倍放大、1/2的缩小和保持数据不变等操作,并且将处理后的数据输入到DAC0832进行数/模转换。主要解决的问题是如何进行数据采集以及怎样进行多路数据采集。     

互相关运算算法在微传感器检测中的应用

本文对电热激励硅微谐振式传感器的数字闭环控制系统中的相关检测运算模块进行设计,从理论上分析利用互相关运算原理实现相关检测的可能性,使用Verilog语言编写代码,并经过QuartusⅡ软件仿真和FPGA开发板的硬件调试验证。结果表明:该模块能够实现相关检测功能,达到设计的要求和性能指标。