电压放大倍数是放大电路的一个重要的技术指标。
电压放大器?。
根据“虚短”和“虚断”的特点，可得到电路的通带电压放大倍数和通带截止频率。
According to "virtual short" and "virtual-off" feature, available to the circuit passband voltage gain and pass-band cut-off frequency.
电压放大器基于所述第一和第二电压信号之间的所检测的电压差而生成第三和第四电压信号。
A voltage amplifier generates a third and a fourth voltage signal based on a detected voltage difference between the first and second voltage signals.
利用铁-康铜热电偶丝、电压放大器、A/D板通过半人工热电偶测温方法在线采集磨削温度；
The grinding temperature is obtained online using thermoelectric couple, voltage amplifier, A/D card and data collection software.
当频率高于截止频率时，随着频率的升高，电压放大倍数将降低，由此电路具有“低通”的特性。
When the frequency is higher than the cut-off frequency, as the frequency increases, voltage amplification factor will be reduced, thus the circuit has a "low-pass" characteristics.
首先介绍了两种专用数字音频处理器的性能特点和原理，然后阐述高品质数字音频电压放大器的几种电路设计方案。
This paper introduces the operating principle of two special digital audio processors, and then describes several circuit designs of high quality digital audio voltage amplifier.
该晶片是一个压电谐振器，以精准而极高的频率对电压作出反馈，进行放大和收缩。
The wafer is a piezoelectric resonator, expanding and contracting in response to electrical voltages at a precise, extremely high frequency.
移位电流被放大，转换成为电压，作为部分复合视频信号或者数字信号输送给外部世界。
The displacement current is amplified, converted to a voltage, and fed to the outside world as part of a composite video signal or digitized signal.
共集-共基组合放大电路具有良好的宽带放大特性，既可以作为缓冲级又能够提供一定的电压和电流增益。
The CC-CE combined amplifier has the nicer wide band magnifiable characteristic qua the buffer and gives some gains in voltage and electric current.
放大器输入为电压信号，与光敏二极管产生的光电流信号成比例。调制光柱以断路器同样的频率照射光敏二极管。
The amplifier input is a voltage proportional to the photocurrent signal produced by a photodiode, which is irradiated by a modulated light beam at the same chopper frequency.
许多实际的放大器将多个放大器级联起来，以获得较高的电压增益。
Many practical amplifiers chain together a series of analog amplifier stages to obtain a high overall voltage gain.
将静电计置于电压模式，然后打开外部反馈，就把反馈电路从内部网络切换到连在前置放大器输出端的外部反馈网络上。
Placing the electrometer in the volts mode and then enabling external feedback switches the feedback circuit from an internal network to a feedback circuit connected to the preamp output.
其它特性包括：集成缓冲用来驱动基准电压，以及集成完全差动放大器用来缓冲调制器输入并进行电平转换。
Other features include an integrated buffer to drive the reference as well as a fully differential amplifier to buffer and level shift the input to the modulator.
和电压表电路一样，可以使用如图1 - 11所示的组合电路来改变皮安表放大器的增益。
Picoammeter amplifier gain can be changed as in the voltmeter circuit by using the combination shown in Figure 1-11.
结果显示，当放大器的负载网络取不同参数值时，分别得到高q值的正弦输出电压和低q值的非正弦输出电压。
The results showed that the sinusoidal output voltage at high Q and non-sinusoidal output voltage at low Q were obtained respectively when the parameters of the load network got various.
这就要求电压的总增益达到109，因此就需要很多放大器级联起来。
This requires an overall voltage gain of 109, so a number of voltage gain stages will be required.
再者，所用的放大器也要考虑在加到输入端的整个共模电压(范围内)输入偏置电流转换保持平滑。
Again, consider using AMPLIFIERs that exhibit a smooth input bias current transition throughout the applied input common-mode voltage.
该带隙电压基准源电路中的深度负反馈运算放大器为低失调、高增益的折叠型共源共栅运算放大器。
A deep negative feedback operation amplifier used in band gap reference is a common source and gate folded cascade operation amplifier with a lower offset voltage and a higher gain.
小于0.5伏的三角波电压经放大后再显示，该电路可作为各种电化学仪器的显示单元。
The ramp voltage less than 0. 5v will be displayed after amplification. The circuit can be used as display unit for various electrochemical instruments.
设计并实现了激励脉冲发射电路、滤波、信号放大、电压比较、检波等信号处理电路。
The interrogation pulse, filter, signal amplifier, voltage comparator and the signal processing circuits are designed and realized.
若考虑伺服放大器效率及电源功率等因素，伺服放大器电源电压应取额定输出电流所对应的伺服放大器输出电压的3倍左右为宜。
If the efficiency of servo amplifier is considered, it is practicable that the power supply voltage is about 3 times as large as the servo amplifier output voltage corresponding to rated current.
在微电流测量技术中，主要是考虑在有效抑制噪声的条件下对从微电流转换来的电压信号放大方法的研究。
The most important technique is voltage amplifier design in study of micro current measurement on condition that noise is restrained.
系统以DSP为控制核心，可自动识别并适应不同的电压和电流等级，采用程控放大、变化采样频率以获得优化的阵列测试效果。
The tester with DSP core could get excellent results by judging and adopting the different value of voltage and current, programmed amplifying and changing the frequency of sample.
其测量信号是经过TA末屏电压信号放大器引入谐波信号数字测量分析系统的。
Its measurement signal is to lead into harmonic signal digital measurement analysis system via ta end screen voltage signal amplifier.
但是短线路在两相短路时，由于测量电压的误差会放大，可能引起距离保护的超越。
Because the voltage measuring error increases when phase to phase short circuit occurs, distance relay protection will act improperly.
但是短线路在两相短路时，由于测量电压的误差会放大，可能引起距离保护的超越。
Because the voltage measuring error increases when phase to phase short circuit occurs, distance relay protection will act improperly.
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