查询词典 analog channel

MER and BER are digital channel quality tests; C/N tests the quality of analog channels.

MER和BER是数字通道质量检测；C/N测量模拟通道的质量。

Because the Hall probe circuit, magnetic-flux meter circuit and extension measurement circuit share the same A/D converter, but MAX110 only have two channel, so the system use CD4052. CD4052 is the analog switch controlled by microcomputer, which can switch the three input channels. The singles is passed to microcomputer after A/D converted.

所有与模拟电路有关的低频接口控制线都采用光电耦合器TPL521进行隔离，而频率较高采用6N137构成单片机相关外围器件的隔离，以便抑制数字电路的尖脉冲和其他噪声对模拟电路产生干扰，提高系统的信号噪声比。

The highly integrated CX2070X SoCs include an integrated audio/voice digital signal processor, multi-bit codec, digital and analog input/out interfaces, and a power efficient 2.5-watt per channel Class-D amplifier to drive stereo speakers or optional post-width modulation and differential line-out for external speaker systems amplifiers.

高度集成的 CX2070X SoC 内置了集成的音频/语音数字信号处理器、多位编解码器、数字和模拟输入/输出接口，以及每通道功效为 2.5 W 的、驱动立体扬声器的或可选的后宽度调制的 D 类放大器，还有用于外部扬声器系统放大器的差分线路输出。

As the third part of the integrated project "Development and Research of the New Generation Automatic Sphygmography", subproject will focus on the time/frequency domain of analog Multi-Channel Signal Processing Technology for the New Generation Automatic Sphygmography.

本计画为整合型计画"新一代自动化诊断脉诊仪开发与研究"中之子计画，而子计画主要是针对类比式多通道脉波处理技术於脉诊平台实现。

THD+N: 20-Hz HPF, 20-kHz AES17 LPF Dynamic range: 20-Hz HPF, 20-kHz AES17 LPF, A-weighted Signal-to-noise ratio: 20-Hz HPF, 20-kHz AES17 LPF, A-weighted Channel separation: 20-Hz HPF, 20-kHz AES17 LPF Analog performance specifications are measured using the System Twot Cascade audio measurement system by Audio Precision in the averaging mode.

的THD + N：20 Hz的高通滤波器，20千赫AES17 LPF的动态范围：20 Hz的高通滤波器，20千赫AES17低通滤波器，A加权信号噪音比：20 Hz的高通滤波器，20 kHz的AES17，A加权频道分离低通滤波器：20 Hz的高通滤波器，20千赫AES17 LPF的模拟性能指标均采用了精密音频系统Twot梯级音频测量系统中的平均模式。

This system mainly contains the front-end pulse interception and back-end software analysis. In the first part, we used a non-invasive infrared measurement method based on the dual channel simultaneous measurement technique. We measured the photo-plethysmograph from the subject's fingers and toes simultaneously, then used an analog circuit and central control unit to process the signals. Finally, the digital volume pulse data is processed by a personal computer. Because the characteristic points of digital volume pulse always occur in sharp variations, this paper proposes two algorithms to solve this problem. First, we find the pacemaker and percussion wave peak from transient slope variation, and then locate the dicrotic notch and dicrotic wave peak by using the wavelet transformation algorithm. When we analyze the data, we use the Visual Basic graphical user interface, which together with the Matlab is the core of the system.

本系统主要包含前端脉波撷取及后端软体分析两部分，其中前端脉波撷取部份是以非侵入式的红外线量测方式，双通道同步量测受测者手指与脚趾的光容积变化描记图，同时将此讯号经类比处理电路及中央控制单元输出成为数位容积波，再传送至个人电脑中；而在后端软体分析部份，因数位容积波之特徵点皆出现於波形中急剧变化的部份，故本论文以瞬间斜率变化量来定位脉波讯号中的起搏点及主波峰顶点，并利用小波转换演算法（wavelet transformation algorithm）来分析重搏切迹与重搏波顶点；程式撰写主要以Matlab为核心，结合Visual Basic的图形化使用者操作介面，增加系统与使用者间的亲和力。

To exert the use of high sensitive CCD and improve the performance of instruments and the quality of pulsatile signal of spectrum,the paper based on linear CCD of buried channel IL-C6-2048C,the output of which is subtractive polarity and discrete analog signal,and intermixes the high amplitude of reset-pulse,designs the circuit to pre-treat properly to the output's signal.

为了充分发挥高灵敏度CCD的作用，提高脉动光谱信号的质量和仪器的性能，本文在埋沟道型IL-C6-2048C线阵CCD基础上，根据CCD的输出信号是负极性的离散模拟信号并且混杂有幅度较大的复位脉冲干扰的特点，设计电路对CCD输出信号进行适当的预处理。

This board has proper strategy to get the data for power quality analysis, because it uses two chip, six channel analog-to-digital converter and phase locking synchronous technology, which make it able to collect three phase electric voltage and electric current signals in timing sampling and equal-time cycle sampling ways.

并采用了两片六通道高速A/D转换器和运用了锁相同步技术，对三相电压和电流信号能进行定时采样和等间隔采样，这样得到的数据对于下一步电能质量指标进行分析更为合理。

Keyboard function set through waveform type,frequency,amplitude,duty cycle,and other parameters of a signal to the microprocessor 89C51 control,MAX038 generated by the various signals,In this process,four-channel signal through D/A converters have simulated voltage and current,It transported up through the analog signal amplification,it enters the frequency MAX038 coarse-IIN,fine-tuning FADJ end,the duty cycle control-DADJ. In its COSC port received a three relays and oscillation frequency capacitance as a choice.

通过键盘设定函数波形种类、频率、幅度、占空比等参数的一个信号进入单片机89C51控制，由MAX038产生各种波形信号，在此过程中信号通过四通道D/A转换器产生模拟电压和电流，它再通过运放将模拟的信号放大，它进入MAX038的频率粗调端IIN、微调端FADJ、占空比控制端DADJ、在它的COSC端口接一个继电器和三个振荡电容作为频率选择。

Eatures · Compatible with MCS-51 Products · 2K Bytes of Reprogrammable Flash Memory – Endurance: 1,000 Write/Erase Cycles · 2.7V to 6V Operating Range · Fully Static Operation: 0 Hz to 24 MHz · Two-Level Program Memory Lock · 128 x 8-Bit Internal RAM · 15 Programmable I/O Lines · Two 16-Bit Timer/Counters · Six Interrupt Sources · Programmable Serial UART Channel · Direct LED Drive Outputs · On-Chip Analog Comparator · Low Power Idle and Power Down Modes Description The AT89C2051 is a low-voltage, high-performance CMOS 8-bit microcomputer with 2K Bytes of Flash programmable and erasable read only memory.

eatures ·兼容MCS - 51的产品·及2k字节的编程快闪记忆体-耐力： 1 000写/擦除周期·在2.7 V至6 V的操作范围·完全静态的运作： 0 Hz至24兆赫·两个层次的程式记忆体锁· 128 × 8位内部RAM · 15个可编程I / O线·两个16位定时器/计数器· 6中断源·可编程串行UART的频道·直接驱动LED产出·单晶片模拟比较·低功耗的闲置和掉电模式描述该AT89C2051的是一个低电压，高性能的CMOS 8位微机与及2k字节的Flash可编程和可擦除唯读记忆体。

Neither the killing of Mr Zarqawi nor any breakthrough on the political front will stop the insurgency and the fratricidal murders in their tracks.

在对危险的南部地区访问时，他斥责什叶派民兵领导人对中央集权的挑衅行为。

In fact,I've got him on the satellite mobile right now.

实际上 我们已接通卫星可视电话了