输入电流

This way adding a biasing current to the input signal is avoided which substantially reduces noise.

这样就避免了向输入信号中加入偏置电流，从而充分降低了噪声。

When 20 kg acceleration is inputted, the potential distribution of piezoresistor device terminals, the corresponding stresses of the piezoresistive element and the current location are also obtained, which testifies the anti-over loading ability from the stress location in the fix-end cantilever.

在20kg加速度的输入下，得到了压阻块应力的分布，以及电流的大小及分布，和悬臂梁的应力大小及分布，验证了加速度计的抗过载能力。

When 20 kg acceleration is inputted, the potential distribution of piezoresistor device terminals,the corresponding stresses of the piezoresistive element and the current location are also obtained,which testifies the anti-over loading ability from the stress location in the fix-end cantilever.

在20kg加速度的输入下，得到了压阻块应力的分布，以及电流的大小及分布，和悬臂梁的应力大小及分布，验证了加速度计的抗过载能力。标签微机电系统压阻加速度计 MEMS piezoresistive accelerometer

In order to be able to drive three separated speed controllers I wanted to be able to isolate the output stages of the controllers to prevent possible unpredictable high current loops between circuits, this also allows us to run one or multiple batteries safely so I experimented with some designs, The opto isolator device (4N35) can be inserted at various strategic parts of the circuit and in fact it is often at the front end at the receiver input but I chose to isolate just the output stage as I will be adding the other channel circuitry to the same receiver and battery eliminator circuit voltage rails.

在为了能够驱动器3分离速度控制器，我想能够隔离输出阶段的控制器，以防止可能出现难以预料的高电流环路之间的电路，这也使我们能够运行一个或多个电池安全，使i试行了一些设计，光电隔离器装置（ 4n35）可以插入各种战略的部分电路，并在事实上它往往是在前端，在接收器输入，但我选择了孤立刚输出阶段，因为我会加入其他渠道电路，同时接收器和电池消除电路的电压轨。

SMD-MC34119 Pinout: C Three External Clock Inputs, Two Multi-purpose I/O Pins per Channel C Double PWM Generation, Capture/Waveform Mode, Up/Down Capability One Four-channel 16-bit PWM Controller One Two-wire Interface C Master Mode Support Only, All Two-wire Atmel EEPROMs Supported One 8-channel 10-bit Analog-to-Digital Converter, Four Channels Multiplexed with Digital I/Os IEEE 1149.1 JTAG Boundary Scan on All Digital Pins 5V-tolerant I/Os, including Four High-current Drive I/O lines, Up to 16 mA Each Power Supplies C Embedded 1.8V Regulator, Drawing up to 100 mA for the Core and External Components C 3.3V VDDIO I/O Lines Power Supply, Independent 3.3V VDDFLASH Flash Power Supply C 1.8V VDDCORE Core Power Supply with Brownout Detector Fully Static Operation: Up to 55 MHz at 1.65V and 85C Worst Case Conditions Available in a 64-lead LQFP Package

SMD-MC34119引脚说明： C款三输入外部时钟，两个多用途I / O引脚每通道双PWM生成，捕获/波形模式，上/下能力的一个四通道16位PWM控制器一两线接口C中间模式支持，只有在所有两线Atmel公司的EEPROM支持的一个8通道10位模拟数字转换器，四通道复用数字I / O的IEEE 1149.1 JTAG边界扫描所有数字引脚5V容限I / O口，其中包括4大电流驱动I / O线，最多一六毫安C镶嵌每个电源1.8V的稳压器，绘图高达100的核心和外部元件 3.3 VDDIO毫安I / O的电源线，独立电源3.3V的VDDFLASH闪光 1.8 VDDCORE核心电源掉电检测与全静态工作：高达55兆赫和85℃时为1.65V最恶劣条件下以64引脚LQFP封装

The automatic control system includes system unit and accessory equipment as well as AD converter, DA converter, memory SCR current convertor, hydraulic valves, pumps, voltage, current and pressure transmitters, switching amount I/O board, top hammer, valve position collector, displacement sensor, hexahedron crown and synthesizing block.

一种六面顶高压合成压机自动控制系统，包括：主机及其附属设备，还有A／D、D／A转换器，存贮器，可控硅变流器，液压阀组、泵组，电压、电流、压力变送器，开关量输出、输入板，顶锤、阀组位置采集器、位移传感器，六面顶，合成块。

In order to reduce the effect of probe errors in near-field antenna measurement, the solutions are proposed as follows: On the one hand, theoretical formula of probe-compensated is derived; on the other hand, drop-shaped probe is designed and near-zone gain, far-field patterns, axial ratio, main lobe width, input impedance, voltage standing-wave ratio, electromagnetic field and current distribution of probe are obtained through the computer simulation.

针对近场测量中的重要误差源之一&探头&的影响，本文提出解决方法：一方面用探头补偿的方法，根据洛仑兹互易定理和微波网络理论对补偿的解析式进行详细推导；另一方面用两种不同的仿真软件求解终端开口矩形波导探头的近场增益、远场方向图、轴比、主瓣宽度、输入阻抗、电压驻波比、电场分布、磁场分布、表面电流分布等特性参数，可实现探头增益的修正。

Practical ammeters, however, do have some small current that flows when the input is open.

然而，实际的安培计在输入端开路时的确有一些小的电流。

Practical ammeters, however, do have some small current that flows when the input is open.

在输入端开路时，理想的安培计指示为零，而实际的安培计总有小部分电流流过。

Voltage Source and Current Source, Thevenin Theory, Trouble Shooting, Characteristic Curve of Diode, Diode Models, Rectifier Circuits, Input Filtering Capacitor, Voltage Multiplier Circuits, Limiter and Clipper Circuits, DC Clampers and Peak-to-peak Detectors, Zener Diode, Zener Diode Rectifier, Photoelectric Devices, Collector-Emitter Junction, Transistor Characteristics of common-emitter, Base Bias, LED Dirver, Establishing a Stable Q-point, PNP Transistor Biasing, Transistor Biasing, Coupling and By-Pass Capacitors, AC Emitter Resistance, Common-Emitter Amplifier, Other Common-Emitter Amplifiers, Cascaded Common-Emitter Amplifiers, AC Load Line, Emitter Follower, Class B Push-pull Amplifiers, JFET Characteristic Curve, JFET Biasing, JFET Amplifier, VMOS Circuit, Differential Amplifier, Operational Amplifier, Non-inverting Feedback, Negative Feedback.

电子学实验( S0704)(1，1)/应用电子学实验( S0472)(1，1)电压源和电流源、戴维宁定理、故障排除、二极体特性曲线、二极体近似模型、整流电路、电容-输入型滤波器、倍压电路、限制器电路和峰值检测电路、直流定位器与峰对峰检测器、齐纳二极体、齐纳二极体整流器、光电元件、集射极接面、集极特性曲线、基极偏压、LED驱动器、建立一个稳定的工作点 Q 、 PNP 电晶体偏压、电晶体偏压、耦合及旁路电容、交流射极电阻、共射极放大器、其他 CE 放大器、串接共射极放大器、交流负载线、射极随耦器、 B 类推挽式放大器、 JFET 特性曲线、 JFET 偏压、 JFET 放大器、 VMOS 电路、差动放大器、运算放大器、非反向电压回授、负回授。

And Pharaoh spoke to Joseph, saying, Your father and your brothers have come to you.

47：5 法老对约瑟说，你父亲和你弟兄们到你这里来了。

Additionally, the approximate flattening of surface strip using lines linking midpoints on perpendicular lines between geodesic curves and the unconditional extreme value method are discussed.

提出了用测地线方程、曲面上两点间短程线来计算膜结构曲面测地线的方法，同时，采用测地线间垂线的中点连线和用无约束极值法进行空间条状曲面近似展开的分析。