| 1. | Digital analog converter
数字模拟转换器 |
| 2. | This type of authentication can be seen as a digital analog to having a physical token
这种类型的认证可以视为对物理标记的数字模拟。 |
| 3. | Allow easy teach ability for teachers . 7 . digital analog program and virtual recording function support simultaneous input and output for 4 digital programs and 5 analog programs
及同步输出功能，教师可以任选数位或类比教材教学，并具虚拟录音座功能，裨益教学 |
| 4. | Allow easy teach ability for teachers . 6 . digital analog program and virtual recording function support simultaneous input and output for 4 digital programs and 5 analog programs
及同步输出功能，教师可以任选数位或类比教材教学，并具虚拟录音座功能，裨益教学 |
| 5. | For the 8 - bit clamp circuits mainly including an 8 - bit dac ( digital analog converter , which can be shown as d / a ) , which function with a matching an op amp that turns the single ended signal to a full differential , so it is the point emphasized in this paper
因为8 bit箝位电路最主要由一个8位的d / a （ digitalanalogconverter可简写为d / a ）和一个与之相配的单端变全差分信号的运放来实现。因此，这也是本文着重论述之处。 |
| 6. | By processing real - time digital analog fault vibration signal and adopting minimum quadric multiplication and rectangle function , correct frequency chart will be gained . thus , the system design based on advanced dsp can be applied to the real - time fault diagnosis of rolling bearing in modern high - speed train
通过对采集的模拟的有故障振动信号进行在线实时数字信号处理，并在信号分析方面采用了最小二乘法及加窗函数，以获得正确的频谱，通过信号处理，并进行结果比对，进而可证明此系统在高速列车转向架滚动轴承在线诊断中应用的可行性。 |
| 7. | The thesis includes the design of hard circuit , pcb ( printed circuit board ) , driver and application soft involving a / d board and d / a board . the detailed functional modules consist of multiplex signals select module 、 analog digital conversion module 、 digital analog conversion module 、 pci protocol conversion module 、 driver and magnifying module 、 control logic 、 clock circuit and configuration circuit . the importance of the thesis is a / d board
本课题包括硬件电路、印刷电路板( pcb ) 、驱动程序和应用软件的设计，涉及a / d板和d / a板两大块部分，具体的功能模块包括多路信号选择模块、模数转换模块、数模转换模块、 pci协议转换模块、驱动放大模块、控制逻辑、时钟电路和配置电路，其中重点是a / d板部分。 |
