After performing the shorts and opens test, the in-circuit tester tests each component on a PCB assembly one at a time.
短路、开路测试完成以后，在线测试仪需要在同一时间对印刷电路板上的每一个器件进行测试。
Sensitive component and circuit board are in solid construction, rigid vibration-proof
敏感部件及线路板是全固体结构，坚固抗振。
The shape coefficient of the two-circuit UHV steel tube transmission tower is obtained by the three-component-force test; and after the resonance response in the results of the HFFB test of the semi-rigid model of the lattice type tower is filtered, the foundation moment spectrum in the along-, cross-wind and torsion direction un der different wind angles is fitted to formulation.
由静力三分力风洞试验得到钢管输电塔的体型系数；对输电塔半刚性模型的HFFB试验结果进行处理，去除了基底弯矩谱中共振响应的影响，并对处理后的弯矩谱进行拟合，得到各风向角下的顺风向、横风向及扭转向的基底弯矩谱公式。
A negative resistance is not a component of the real circuit, but it can be realized by using other circuit components.
负电阻不是实际存在的电路器件，但它可以通过其它的电路元件来实现。
It not only guarantees with no loss in the printed circuit board and each component, but also improves the velocity and precision of the testing of capacitance greatly.
既保证了印刷电路板和各元件完好无损，又可大大提高了电容测试的速度和精度。
ABSTRACT With the widespread use of VLI, VLSI component on Printed Circuit Board, traditional logical test process is time consuming, complex, and of high cost.
随着大规模、超大规模集成电路和表面安装技术在印刷电路板制造中的广泛应用，传统的印刷电路板逻辑测试方法面临着严重的挑战。
ABSTRACT With the widespread use of VLI, VLSI component on Printed Circuit Board, traditional logical test process is time consuming...
随着大规模、超大规模集成电路和表面安装技术在印刷电路板制造中的广泛应用，传统的印刷电路板逻辑测试方法面临着严重的挑战。
Manufacturing equipment ranges from semiconductor fabrication, lightwave/optical component fabrication, printed circuit board manufacturing, and assembly and hard drive manufacturing.
无论是服务器、台式机和笔记本计算机还是投影仪和硬盘，IT 交易会为 IT、网络计算和电讯设备等提供了一个巨大的市场。
Printed circuit board; component; liberation; content
电路板；组成；解离；含量
A large number of structures will be discusses to improve the delta-I noise, i. e. etch slot and put ferrite bead between the component and another component to isolated delta-I noise. This method not only increases the cost of product and the ferrite bead is low pass circuit that will make signal integrity problem.
以往的论文有提出许多改善突波电流杂讯的方式，例如利用蚀刻槽线及磁珠元件隔离元件与元件之间突波电流杂讯的干扰等，但如此不仅容易导致电路成本的增加，并且由於磁珠为低通的元件，反而会造成低频的功率完整性问题。
Under normal circumstances, only a spark generator, the working hours of 0.5~1s, the reason does not automatically break arc in general is to control the circuit board component disorders, spark generator, electrode gap inappropriate discharge.
正常情况下，火花发生器的工作时间只有0.5～1s，不能自动断弧的原因一般是控制线路板元件失调，火花发生器的放电电极间隙不合适。
On the basis of design theory of multi-layer PCB, the thesis detailedly introduces the PCB realization process of SoC verification platform by the following four steps: founding the component decal; definning the board outline, importing the circuit netlist; assigning the design rules, component placement and routing; design rule checking and copper pouring.
然后，根据多层PCB板的设计原理，从建立元件封装、定义PCB板的板边框，导入网表、定义设计规则，元件布局布线、设计规则检查，覆铜四个步骤详细介绍了SoC/IP验证平台的板级实现过程，同时对SoC/IP验证平台作了信号完整性分析。
the discrete component, integtate circuit and the mixed of them are used in fed matrix scan power amplifying circuit. power mos tube is used in push-pull power amplifying circuit, stv7697b which exclusive use in pdp is used in the integtate circuit, particularly introducing the circuit designing method, the mixed method includes the strongpoint of them, it is the first time to use this method in fed. all of these methods have been applied to the 25 inch colour fed driving system which could display color images. and the mixed methods are further appllied to the 34 inch colour fed.
摘 要：采用分立、集成及它们的混合方案来实现场致发射显示器矩阵扫描功率放大电路。分立式采用功率型mos管组成的推挽功率放大电路来实现，集成式主要是基于pdp专用驱动芯片stv7697b，详细介绍了电路设计方案，混合式驱动方案结合了分立和集成两种驱动方式的优点，这个方案在fed的应用尚属首次。这些方案已经应用于25英寸彩色fed驱动系统中，能显示各种彩色视频图像，亮度达410 cd/ m2，对比度达1 010∶1。其中基于stv7697b的分立、集成混合驱动方案将在34英寸的彩色fed中得到进一步的应用。
To know that dust and static electricity are the enemy of electronic equipment, board thickness on the dust component is not conducive to heat, damp weather also easily lead to local short-circuit.
要知道，灰尘和静电都是电子设备的大敌，板卡上灰尘过厚不利于元器件散热，天气潮湿时还容易引起电路局部短路。
By main control AT89S52、clock circuit DS1302、The temperature sensor DS18B20、display circuit、keystroke circuit and restore circuit component, to achieve clock calendar display function can be carried out, hours seconds of the show and real-time temperature display.
系统由主控制器AT89S52、时钟电路DS1302、温度传感器DS18B20、显示电路、按键电路、和复位电路等部分构成，能实现时钟日历显示的功能，能进行时、分、秒的显示。
This controller is the typical sequential control circuit which is constituted by many kinds of logical integration component.
该控制器是由多种逻辑集成器件构成的典型时序控制电路。
The output analog signal of the grating torque sensor is magnified, shaped and filtered by ispPAC10 on the basis of component program, which gets rid of traditional circuit's complex debugging.
采用ispPAC10芯片，通过器件编程的方式，实现对模拟信号的放大、整形和滤波，避免了传统模拟电路调试的麻烦。
Moving iron-style electro-acoustic transducer in the magnetic circuit by a fixed coil and the vibration of the ferromagnetic component parts.
动铁式电声换能器主要由固定于磁路中的线圈和可振动的铁磁性部件所组成。
The electronic governor is an important component of the diesel locomotive control system, the main contents of which are:the design of electronic governor controller by applying PID algorithm and Goodwins self adaptive scheme, the design of control circuit, the design of analogue input channel and logical input channel, and the software progr...
电子调速器是内燃机车微机控制系统的一个组成部分，其设计的主要内容有：采用PID控制算法和哥德温自适应控制方案的电子调速器的设计，主控制电路的设计，模拟量输入通道与数字量输入通道的设计，及上述各部分的软件编程与统编
MC145554P Pinout: RFR6000 Device Features · Compatibility with QUALCOMM's radioOne ZIF chipset eliminates the entire IF, reducing component count and space · Single- or multiband operation: cellular, PCS, GPS · Single- or multimode operation: cellular CDMA, PCS CDMA and GPS · Full downconversion RF to baseband · Receive path circuitry C GPS LNA C Stepped gain control C Three sets of quadrature downconverters C Band-specific low-pass filter C Baseband amplifiers with DC offset adjustment · Only one single-band external VCO is needed for all CDMA bands of operation for entire radioOne chipset · Includes entire on-chip GPS VCO-including resonant circuit · Individual circuit power on/off controls · Power reduction feature control extends handset standby time C Selective circuit power-down C Gain and bias controls · Low-power supply voltage (2.7 to 3.0 V), low-power dissipation C Digital reference voltage is compatible with lower MSM voltage (1.8 to 3.0 Vdd)· Available in small, thermally efficient package 40-pin BCC
MC145554P引脚说明：RFR6000设备特点·与高通公司的芯片组的radioOne的ZIF兼容性省去了中频全，减少元件数量和空间·单或波段操作：蜂窝电话，个人通讯，全球定位系统·单或多模操作：蜂窝CDMA及PCS CDMA和GPS ·全变频射频到基带接收通道电路直流· GPS LNA与步进增益控制C三组的正交下变频器C波段专用低通滤波器基带放大器失调调整·只一单波段外部VCO的运作都需要对整个的radioOne所有CDMA芯片组·包括整个频带上的芯片GPS的VCO，谐振电路·个人，包括开/关控制·节电功能扩展电路的功率控制手机的待机时间C选择性电路断电C增益和偏置控制·低电源电压（2.7至3.0 V），低功耗C数字参考电压与低电压兼容的MSM（ 1.8至3.0电压Vdd）·提供小，热效率的封装