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    A/D conversion realizes the conversion from simulative signal to numeric signal by means of inquiry;
    A/D转换模块采用查询方式,完成模拟信号向数字信号的转换;
    Besides the software and hardware design, the thesis also presents the transformation between analog and digital video signal, I2C-bus and CAN-bus.
    除了本系统软硬件设计等主要内容外,本论文还就本系统所涉及到的一些技术进行了讨论,例如视频模拟信号与视频数字信号的转换,I~2C总线与CAN总线的应用等。
    The principle of the circuits are stated: firstly, realize 4 bit current mode flash ADC, the digital result is sent to DAC, then subtracted by input current, pass current amplifier, at last get to subsequent 4 bit flash ADC.
    它首先实现高4位的ADC(采用并行电流模ADC实现的),高4位数字信号除了输出外,又通过DAC把高4位的数字信号转换为模拟信号,并与输入模拟信号进行相减,剩余的低位输入的信号通过电流放大器,输入到第二级并行ADC中,实现低4位的数字信号输出,最后与高4位数字信号合在一起构成整个ADC的输出。
    With core components of TLC2543 A/D converter and AT89C52 single chip, the data collector is designed to finish the conversion from analog signal to digital signal. The sampled data is transported to PC by RS-232 serial communication.
    以TLC2543A/D 转换器和AT89C52 单片机为核心器件设计了数据采集器,完成模拟信号到数字信号的转换,并通过RS-232串行通讯把采样数据传输给PC机。
    The signal acquisition system mainly deal with the acquisition of EEG, the conditioning, amplifying and A/D converting which are imposed on the signals, only after this can the signals enter the computer.
    该系统主要是完成了对脑电信号的采集、前置放大、中间级放大、调理和A/D(模拟信号-数字信号)转换,使之进入计算机。
    The part is capable of driving up to 100mA of current through a Fiber Optic LED from an ECL or TTL level input signal.
    它将输入的TTL 或ECL 数字信号转换为相应的高频电流脉冲驱动光纤LED,电流脉冲最高可到100mA。
    (3) Make the MCU control to the integration A/D's registers for the analog signal to the digital signal of the voltage signal of the sensor.
    (3)用单片机来控制其内部集成的A/D转换器的相应寄存器对传感器输出的电压信号进行从模拟信号到数字信号的转换。
    For the importance of FT in signal processing, the most important step from theory to practice is to change the digital signal into analog signal by the method of sampling.
    由于傅立叶变换在信号处理中有着很重要的意义和作用,而在信号处理中最重要的由理论通向实践的重要一步就是将数字信号转换为模拟信号,这项工作的实现手段就是采样。
    Besides,the principle of resolver digital converter AD2S90 and special chip AD2S99 as well as their interface method with DSP are all given.
    给出了基于AD2S90和AD2S99的旋转变压器 /数字信号转换的原理及其与DSP的接口方法
    The transmission of E1 data packet to EPON bus was realized by conversion of HDB3 line encoding to NRZ digital signals, setting up clock of system and network, organizing EPON data frame, and generating synchronization clock of E1 circuit simulation etc.
    其 E1 数据包到 EPON 总线的传输,通过 HDB3线路编码到 NRZ 数字信号的转换,系统及网络时钟设定,EPON 数据帧的组织,E1 仿真电路同步时钟的产生等步骤实现。
    In the design FPGA is used to control audio sampling and accomplish the conversion from digital audio signal to PWM signal,and then the PWM signal is used to drive the H-bridge for providing audio power output.
    设计中通过FPGA实现对音频信号的采样控制,并将采样的数字信号转换为脉宽调制(PWM)信号,然后驱动H桥电路,实现功率放大。
    Digitization of the IF processing confers several important advantages in a receiver, including greater reliability, potentially lower power dissipation.
    射频接收器架构中,在一个中频上就进行模拟数字信号转换有诸多优点,比如更高的信号处理可靠性和更低的电路功耗,更重要的是有利于射频接收器系统的集成,为多制式射频接收电路的研制提供了可能。
    In this design ,the Pcm interface chip is TP3057,it was used tofinish A/D transform ,The compress coding was finished by Q4401 ,the initialization and control were accomplished by 8051 singlechip.
    在设计中用PCM接口芯片TP3057来完成从模拟信号到数字信号的转换,再由Q4401进行压缩编码,对Q4401的初始化及控制由8051单片机来完成。 本文中详细的给出了这一设计的软硬件实现方案。
    The usage of digital signal and its merit in storage, transmission, and processing make people pursue to convert digital signal into PWM signal directly,which amplified through switching amplifier.
    数字信号源的广泛使用及数字信号在存储、传输和数据处理上的优点,使人们开始追求直接将数字信号转换为PWM信号,通过开关放大器进行放大,省去传统功放所需的模数转换环节。
    Based PC, D/A convertor and 2-dimension galvanometer scanning system, lasermarking control system is built. Coordinate data scanned and kept in the computer are transformed into the analog signals by D/A converter, then control the galvanometer to deflexion.
    基于PC、D/A转换器和二维振镜扫描系统搭建激光打标机控制系统,将存储在主控计算机的扫描坐标点的坐标数据通过D/A转换,将数字信号转换成模拟信号来控制振镜偏转。
    The signal detection system based on RS-232C standard fulfills the diversion of gas sensors’ analog signals to computer’s digital signals and digital signals’ storage ,and provides the standard datasheet for pattern recognition and emulational algorithms.
    基于RS-232C标准的数据采集模块实现了从气体传感器模拟信号到计算机数字信号的转换以及数据的有序存储,为模式识别和仿真算法提供了标准化的数据集。
    The first module is used to acquire analog image data and convert the data to digital signals.
    图像信号采集与转换模块主要完成模拟图像信号的接收和模拟/数字信号转换;
    This paper brings forward new method on measuring the plate current density of ESP and introduces each parts of the measuring device such as the transforming of I/O, the magnification of pressure code, the transforming of A/D, the interface circuit, the data receiving method of computer and etc.
    本论文就电除尘器的板电流密度的测试提出了新的方法,并就测试装置的各组成部分,如:I(电流)/V(电压)转换及电压信号的放大、A(模拟信号)/D(数字信号)转换及接口电路、微机对数据的接收方法等作了详细的说明。
    In this paper, a high resolution DAC is designed by using ∑-△ structure.
    基于过采样和∑-Δ噪声整形技术的DAC能够可靠地把数字信号转换为高精度的模拟信号(大于等于16位)。
 

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