AD590在光电测量电路中的应用

温度传感器是用来感测温度的，因此利用温度传感器可以将周围环境中温度的变化转换成电流或电压的变化，从而可以实现电流或电压的调整。现以AD590为例介绍温度传感器在激光器和光检测器中的这种应用。     

基于FIF0与电平转换器的DSP高速ADC系统

给出了一种以DSP数字信号处理芯片TMS320VC5402作数据处理器，结合高速模数转换器AD9244、先进先出缓冲存储器芯片IDT7204以及电平转换器SN74ALVC164245构成的高速数据采集系统的设计方案。     

内含低噪声可编程增益放大器的24位∑-Δ模数转换器AD1555/AD1556

美国ADI公司推出的24位∑-Δ模数转换器AD1555/AD1556内含可编程增益放大器,可用于低频、大动态范围的测量,并可实现模拟输入线性输出,AD1555/AD1556有五种不同的增益设定.将AD1555和AD1556数字滤波器/抽样器结合使用可组成高性能的模数转换器,因而可广泛应用于地震数据探测系统和自动测试装置.     

AD603在振动信号采集系统中的应用

本文介绍了ADI公司的电压控制增益低噪声、宽带放大器AD603的原理、特点及其在振动信号采集系统中应用的电路设计方法。     

双高速低噪声运算放大器AD8022

AD8022是ADI公司生产的双重高速低噪声运算放大器，它具有低噪声、低功耗，低失真等特点，可以作为各种数字用户线的接收放大器。文中介绍了AD8022的技术性能和工作原理，给出了用AD8022组成的差动输入Sallen-Key滤波器的应用电路。     

绝缘电阻的数字测量

介绍如何利用AD674A来完成绝缘电阻的数字测量，阐述了硬件结构与软件设计。     

A stereoselective synthesis of squalamine

Squalamine (1) was synthesized stereoselectively in 14 steps and 19% overall yield from 3-keto-5-chenodeoxycholanate (2) by using a modified Sharpless asymmetric dihydroxylation as the key step.     

Virtual Screening and Hit Selection of Natural Compounds as Acetylcholinesterase Inhibitors

Acetylcholinesterase (AChE) is one of the classical targets in the treatment of Alzheimer’s disease (AD). Inhibition of AChE slows down the hydrolysis of acetycholine and increases choline levels, improving the cognitive function. The achieved success of plant-based natural drugs acting as AChE inhibitors, such as galantamine (GAL) from Galanthus genus and huperzine A from Huperzia serrate (approved drug in China), in the treatment of AD, and the fact that natural compounds (NCs) are considered as safer and less toxic compared to synthetic drugs, led us to screen the available NCs (almost 150,000) in the ZINC12 database for AChE inhibitory activity. The compounds were screened virtually by molecular docking, filtered for suitable ADME properties, and 32 ligands from 23 structural groups were selected. The stability of the complexes was estimated via 1 μs molecular dynamics simulation. Ten compounds formed stable complexes with the enzyme and had a vendor and a reasonable price per mg. They were tested for AChE inhibitory and antioxidant activity. Five compounds showed weak AChE inhibition and three of them exhibited high antioxidant activity.     

基于DSP的列车振动测试系统

为方便、快捷地检测和评价列车的振动性能,将AD73360及DSP技术应用到列车振动测试系统中。采用AD73360将车厢内的振动加速度转换为数字信号,再利用DSP芯片的高速数据处理能力对加速度信号进行分析,同时在线得到列车运行的平稳性和舒适性指标。研究分析了列车振动测试系统,给出了系统设计方案,详细介绍了TMS320F2407 DSP和AD73360接口电路的软硬件设计方法。实践证明,该系统能够准确、快速地在线测得列车运行的振动参数,为保障行车安全提供比较有效的依据。     

基于AD9957的双通道高速数字调制信号源设计

介绍了ADI公司具有内部调制功能的高速DDS器件AD9957的特点与应用,并提出了一种全新的高速调制信号源设计方案,给出了硬件结构框图和软件流程,详细介绍了系统工作原理.实践证明,输出正弦波最高频率达400 MHz,调制波调制速度可达1 MHz.