查询词典 current amplifier

The research has studied a type of double input direct current amplifier which is holohedral symmetry and whole complementry to get the work fundamental of this electric circuit, and investigate the basic way and principle of the design.

文中通过对一款双差分输入全对称全互补直流功率放大器进行分析，总结出了这一类电路的工作原理，并探讨了这类电路的基本设计方法和设计原则。

The CC-CE combined amplifier has the nicer wide band magnifiable characteristic qua the buffer and gives some gains in voltage and electric current.

1共集-共基组合放大电路性能分析常见的组合放大电路有共射-共基、共集-共射和共集-共基等多种形式。

At first, this paper gives the brief introduction of the history and present status of accelerometer and its testing technology, the working principium and math model of the liquid floated pendu-lous accelerometer, and then, decides the binary width pulse force retrim loop as the design proposal of testing system, researches the transfer function of every part in the system emphasizly, analyses the stability of the whole accelerometer testing system from the angle of control theoretics by the open loop transfer function of system, and designed the correcting net, analyses the basal problems such as resolution, sampling restraint, precision and so on, designs the hardware testing circuits such as preamplification, band-pass filter, alternating amplifier, phase sensitive demodulatorn, pulse-width modulation, frequency scale circuit, moment current generator. Finally, using the graphics program language LabV-IEW which is designed for testing field especially by NI accomplishes the solfware design of testing system,realized the testing functions.

首先对加速度计及其测试技术的发展历史和现状，液浮摆式加速度计的工作原理和数学模型等作了简要的介绍，然后确定了以二元调宽脉冲再平衡测试回路为设计方案，并从控制理论的角度进行了分析，着重研究了系统中各部分的传递函数，利用系统开环传递函数分析了系统的稳定性，同时设计了系统的校正网络；分析了二元调宽脉冲再平衡测试回路的分辨率、采样约束以及测试精度等基本问题，并按照系统分析的结果设计了包括前置放大、带通滤波、交流放大、相敏解调、脉宽调制、频标电路以及力矩电流发生器等测试系统各部分硬件电路，验证了电路的正确性，最后按照测试系统的要求，采用了美国NI公司专为测试领域所开发的虚拟仪器工具——LabVIEW作为测试软件开发工具，利用该图形化编程语言完成了测试系统软件部分的设计，实现了测试功能。

An improved current-controlled tristate switching power amplifier based on sample-hold strategy is proposed in this paper.

提出一种改进的基于采样-保持策略的电流三态调制开关功放。

First it changed the variety of capacitive into the variety of voltage by charge amplifier ,then demodulates the carrier wave signal modulated by the accelerometer signal and passed thought the low pass filter ,at last ,output a direct current signal which is directly proportional the accelerometer signal ,the circuit has the function of measuring the variety of capacitive and the specialties of higher sensitive and better linearity.

介绍一种可用于微机械电容式加速度计检测的接口电路，该电路利用电荷放大器把电容变化转变成电压变化，再对被加速度信号调制的载波信号进行解调，经过低通放大滤波，最后得到与加速度信号成正比的直流电压信号，具有测量差分电容变化的功能和灵敏度高、线性好的特点。

This system consists of a power unit, a four-electrode probe, a constant current drive unit, pre-amplifier and filter units, a signal generator unit, and data acquisition and control units, where the signal generator unit, and the data acquisition and control units are carried out utilizing DAQ card (PCI-6024E) which is mounded inside a PC.

本系统硬体方面主要包括下列几个部份：电源电路单元、四端电极单元、定电流驱动单元、前置放大与滤波单元、信号产生单元、和资料撷取与控制单元等。

One or more sense amplifiers for sensing the conduction current of non-volatile memory is controlled by signals that are timed by a reference sense amplifier having similar characteristics and operating conditions.

本发明提供用于感测非易失性存储器的传导电流的一个或一个以上感测放大器，其是由通过具有类似特性及操作条件的参考感测放大器而定时的信号加以控制。

At this time, the amplifier output current is zero, the servo valve closed, hydraulic cylinder driving the valve plate parked in the corresponding position of qT.

这时，放大器的输出电流亦为零，伺服阀关闭，液压缸带动的阀板停在相应的qT位置。

According to the pamphlet, the current in the amplifier can be amplified to 3 amperes.

根据小册子，在放大器里的电流可以被放大到 3 安培。

According to the pamphlet, the current in the amplifier can be amplified to 3 amperes.

根据这个小册子，在放大器中的电流可以被增强到3安培。

I had a lovely dog named PiPi, he was one of my best friends.

我曾经有过一只小狗，它的名字叫皮皮，它很善良，它是我最忠实的朋友。

Newly ovulated mouse oocytes were cultured in the CZB medium supplemented with different concentrations of pyruvate before treated for activation or assayed for MPF activity.

我们猜测卵母细胞在不含丙酮酸的条件下老化的更快，并且卵丘细胞可能通过消耗不含葡萄糖的CZB中的丙酮酸从而促进卵母细胞老化。