基于CC2530的医用体重测量系统设计

设计了一种基于CC2530的医用体重测量系统,该系统主要使用CC2530的无线通信功能,结合压力传感器,AD转换器等实现病人体重的连续监测.压力传感器的输出信号通过24位的高精度∑-△型AD7799进行模数转换,接收端收到的数据能够通过AT24C04进行存储,达到掉电保存,采用Nokia5110终端显示.     

对一款新型高精度电子计重仪的研究

新型高精度电子计重仪是一款全新的高精度的全自动计重仪器,它主要由称重传感器,16位单片机控制模块,AD转换模块,数码管显示模块,交流稳压电源五部分组成。针对目前广大的市场,我们有针对性地开发出这套有实用价值的电子秤系统。从技术上克服诸多缺点,改善电子秤系统在应用中的不足之处,具有现实意义。     

一种自适应的无线射频识别系统中的防冲突算法(英文)

A novel anti-collision algorithm in RFID wireless network is proposed.As it is put forward on the basis of collision tree(CT)and improved collision tree(lCT) anti-collision protocols,we call it adaptive collision tree protocol(ACT).The main novelty of this paper is that the AD strategy is introduced and used in ACT to decrease collisions and improve the tag system throughput.AD strategy means that query strings will divide into two or four branches adaptively according to the label quantity.This scheme can decrease both depth of query and collision timeslots,and avoid producing too much idle timeslots at the same time.Both theoretical analysis and simulation results indicate that the novel proposed anticollision protocol ACT outperforms the previous CT and ICT protocols in term of time complexity,system throughput,and communication complexity.     

ST8105A实现AD688AQ测试

针对在数模混合测试仪器ST8105A上实现AD688测试的需要,通过对仪器的软硬件资源与器件测试需求的软硬件资源进行分析比对,将两者的资源进行匹配并进行合理的优化分配使用,利用已有的测试仪器的软件API对测试仪器硬件的控制测试,实现了AD688测试需要的适配器设计及软件编程,并完成测试,达到对测试仪器软硬件资源熟悉掌握并可熟练运用的目的.     

用于感应同步器的数字变换芯片AD2S90

AD2S90是AD公司生产的能以鉴相的方式对感应同步器信号进行数字化处理的专用芯片。它具有成本低、功耗小、功能多、所需外围元件少等优点，文中介绍了AD2S90数字变换芯片的引脚功能、工作原理及输出信号模式。同时给出了一个由AD2S90组成的单片机数显表的实现方案。     

5V供电的CATV线驱动器AD8323

AD8323是ANALOG DEVICES公司生产的，采用5V供电的CATV线驱动器，它具有良好的阶梯输出功率控制功能，同时具有低失真，低噪声，支持SPI接口等优良性能，是一个低功耗，数字控制的可变增益放大器，最适合对同轴电缆的驱动，文中介绍了AD8323的主要性能，引脚功能和它在应用设计中的说明。     

实现侦察接收机宽范围自动增益控制的一种方法

现代的侦察接收机都要求接收机在宽频带范围内工作，传统的自动增益控制方法已经难以满足要求。介绍一种采用乘法型D／A转换器，实现宽范围的自动增益控制的方法，这对现代侦察接收机的设计具有一定的参考价值。     

AD855x系列在微弱信号检测中的应用

分析一般的前置放大器存在的问题及传统的解决办法，详细说明了AD855x系列的性能优点及其在微弱信号检测中的应用。通过实例说明在应力传感系统中使用AD855x系列的显著优点。     

Metal-amyloid-β peptide interactions: a preliminary investigation of molecular mechanisms for Alzheimer''''s disease

Although humans have spent exactly 100 years combating Alzheimer's disease (AD), the molecular mechanisms of AD remain unclear. Owing to the rapid growth of the oldest age groups of the population and the continuous increase of the incidence of AD, it has become one of the crucial problems to modern sciences. It would be impossible to prevent or reverse AD at the root without elucidating its molecular mechanisms. From the point of view of metal-amyloid-β peptide (Aβ) interactions, we review the molecular mechanisms of AD, mainly including Cu2 and Zn2 inducing the aggregation of Aβ, catalysing the production of active oxygen species from Aβ, as well as interacting with the ion-channel-like structures of Aβ. Moreover, the development of therapeutic drugs on the basis of metal-Aβ interactions is also briefly introduced. With the increasingly rapid progress of the molecular mechanisms of AD, we are now entering a new dawn that promises the delivery of revolutionary developments for the control of dementias.     

基于AD9958的双通道直接频率合成器的设计

介绍了高性能DDS器件AD9958的主要特点和内部结构,简单描述了AD9958用作直接频率合成器时输出单频信号的控制方法。给出了利用89C51系列单片机和AD9858组成的双通道直接频率合成器的设计框图。结果表明以AD9958作为核心部件设计的双通道直接频率合成器可以对通道间的不均衡进行校正,也能够对多片AD9958实现同步。