To get the problem solved, a protection circuit has been designed, which contains a micro-current amplifier, an absolute window voltage comparator, an ultra-range tips circuit, a UREF benchmark constant voltage source circuit, and an executive circuit.
针对这一问题，设计了一个保护电路，整个系统由微电流放大器、绝对值窗口电压比较器、超量程提示电路、UREF基准恒压源电路、执行电路构成。
Variable gain amplifier is an analog circuit, which varies gain, adjusts signal dynamic range and stabilizes signal power.
可变增益放大器是模拟单元电路之一，起着变化增益、调整信号动态范围、稳定信号功率的作用。
The approach uses a pulsed semiconductor lasers, a low-noise and low-temperature receiver with a PIN diode detector and FET transimpedance amplifier together, and means of digital-averaging and digital-filtering signal processing, to reduce the receiver`s noise to a minimum. It uses a Y type fiber distributor to reduce the reflection form the front of tested fiber too. By enhancing the receiver s sensitivity and signal-noise ratio we can enlarge the dynamic range of PC-OTDR greatly.
采用脉冲半导体激光器组件，低噪声、低温PIN-FET组件，使用数字平均结合数字滤波的信号处理方法，最大限度地抑制接收机的噪声；用Y型光纤分路器，降低前端反射，提高接收机的灵敏度和信噪比，使PC-OTDR获得大动态范围。
It can be fathomed the signal transforms into the digit signal through the analog signal by means of analog-digital conversion utensil ADC0809, Through the combination of multi-channel analogue switch and proportion amplifier, more voltage and current range was set up. Through constant current source circuit, the resistance/voltage measure was normalized.
通过模数转换器ADC0809将被测信号由模拟信号转换成数字信号，通过多路模拟开关与比例放大器的组合设置了多个电压、电流量程，利用恒流源电路实现了电阻/电压归一化测量。
Models include: a two-channel aid which is one of the cheapest; a four channel aid which also provides feedback reduction and comes with a speech amplifier; and the top of the range aid which along with four channels also features echo containment and the reduction of layered noise.
模式包括：双通道援助是最便宜的，一个四通道的援助也提供反馈减少和配备语音放大器；和顶部的各种援助以及4个频道还具有回声遏制和减少层次的噪音。
Mornsun has DC-DC, AC-DC power module, IGBT, LED and isolation amplifier. Power range of products is from 0.1W to 100W. They have compact sizes, high efficiency, and good compatibility.
公司主要产品有DC-DC、AC-DC、IGBT驱动、LED电源产品、工业信号隔离变送器/安全栅，输入功率从0.1W到100W，是全球微功率电源厂商中品种最多最全的制造商，具有体积小、效率高、兼容性好，可靠性高等特点，满足客户的通用性和个性化设计需求。
AMPLIFIER transient response is faster through the middle of the common-mode range by as much as a factor of 2 for bipolar input stages and by a factor of the square root of 2 for FET input stages
如果整个输入共模范围里两个差分对都有效的话，共模输入电压在共模范围中间，运算放大器的瞬态响应将加快，对于双极输入差不多加快2倍，而对于FET输入加快根号2倍(1.414)。
For signal conditioning or data aquisition we recommend our broad range of amplifier and A/D converter.
信号调节或数据采集，我们建议我们的放大器和A/D转换器广泛。
It measures the range and frequency of the vortex flow meter output signals by the analog to digital converter of the DSP on real time, and the gain of the variable gain amplifier is controlled by the digital to analog converter, then the relative stable range of the sensor output signals can be obtained.
利用DSP上集成的模拟数字转换电路实时检测涡街流量计传感器输出信号的幅度和频率，采用数字模拟转换电路对变增益运放进行控制，控制传感器输出信号幅度的相对稳定。
Programmable Gain Amplifier is used in a variety of applications to optimize the dynamic range of the overall system.
1绪论可编程增益放大器`〕是很多应用中最基本的模块，它主要用于优化整个系统的动态范围。
A low noise rail-to-rail input and output range operational amplifier was desighed.
设计了一个轨到轨输入输出范围的低噪声运算放大器。
Using four Gain-Amplifier casecade architecture on circuit achieves the system requirement that the gain range is 0~60dB, with 1dB gain step.
此设计是采用四级差动放大器的架构来达到系统要求，增益范围设计在0dB到60dB，最低增益步阶为1dB。
A fully differential R-MOSFET-C fourth-order Chebyshev filter employing fully differential operational amplifier, passive resistors and current-steering MOS transistors is proposed, this proposed implementation relies on the tunability of current-steering MOS transistors in the triode region acting as variable resistors in order that the cutoff frequency of the filter could be tuned continuously, the amplifier is not only with voltage common-mode negative feedback, but also with current common-mode negative feedback, which will benefit for the stability of its dc operating point, the filter whose cutoff frequency range is from 20kHz to 420kHz, demonstrates better than 65dB THD with 100kHz, 2.5Vpp input signal in Taiwan UMC 2P2M(2-Poly, 2-Metal) 0.5pm CMOS technology, the filter measures 0.36mm2, and consumes only 16mW from a single 5.0V power supply.
摘要提出了一种新的全差分运算放大器，该运算放大器在具有电压共模负反馈的同时还具有电流共模负反馈，能较好地稳定其工作点。通过利用MOS管工作在线性区便能作可变电阻之用的特性，设计实现了基于R-MOSFET-C运放的全差分频率连续调节的四阶Chebyshev低通滤波器。该滤波器采用台湾联电2层多晶硅、2层金属(2P2M)5V电源电压、0.5μm CMOS工艺生产制造。其芯片面积大小为0.36mm~2，截止频率调节范围为20kHz到420kHz，输入信号频率在100kHz，2.5Vpp时的失真小于-65dB，功耗仅为16mW。
Since the lower differential amplifier has provisions for an external emitter resistance, its linear signal handling range may be adjusted by the user.
由于差动放大器具有较低外部辐射源规定抵抗其射程可以调整线性信号处理的用户。
7Nm 重复性:优于±5%#TECHNICAL SPECIFICATIONS:⑴intensity range measured 0.1-30000(uwcm2)⑵measured range of ultraviolet rays 200-320 nm central wavelength 254nm ⑶amplifier is constructed by collector block and the measured values are stable and reliable ⑷size 200×150×85mm weight 1kg ⑸supply2×1.5v 1#battery ⑹temerature of work enviroment 0-40℃ relative humidity≤80% Without disturbation due to strong magnetic and electric field ⑺precision ±15%(2253.7nm) repetation better than ±15
技术指导⑴量测强度宽：0.1-30000(uwcm2)⑵紫外线范围：200×320nm（中心波长254nm ⑶放大器采用集成块测量值稳定可靠⑷外形尺寸：200×150×85mm重量1公斤⑸电源：1.5v1号电池2节⑹工作环境条件：温度（0-40℃相对湿度≤80%），无强电电磁场干扰。
S interlock delay time. Its own work and a wide supply voltage range (3~20V), in its interior is also designed to be driven with the power devices, adopted by the current linear current amplifier circuit design also ensures internal 3 channel high side driver and low side drivers can be used alone, can only use it within three low side drive, and input signal level compatible with TTL and COMS.
它自身工作和电源电压的范围较宽(3～20V)，在它的内部还设计有与被驱动的功率器件所通过的电流成线性关系的电流放大器，电路设计还保证了内部的3个通道的高压侧驱动器和低压侧驱动器可单独使用，亦可只用其内部的3个低压侧驱动器，并且输入信号与TTL及COMS电平兼容。
An advantage to this type of rail-to-rail input stage design is that input stage transconductance can be made constant throughout the entire input common-mode voltage range, and the AMPLIFIER slews symmetrically for all applied signals.
slews指以某升/降速率变化：放大器对所有信号的升/降都以相等的速率变化着。
We achieved a lasing output with continuously tunable wavelength in the range from 1547.70 to 1557.52nm when the pump power of power amplifier is 1.5W and 2.5W. Its optical signal-to-noise ratio and 3-dB spectral width is about 30dBm and no more than 0.1 nm, and the slope efficiency is about 80.1%.
在放大器的泵浦功率为2.5W时，实现了在1546.96nm-1557.72nm波段波长连续可调谐的激光输出，激光器的边模抑制比高于30dBm，3dB谱线宽小于0.1nm，斜率效率高达80.1%。
A system based on three-wavelength in near infrared range was designed to detect the blood glucose concentration. The system is composed of a light source, a chopper, a detector and a lock-in amplifier. 1200 nm, 1350 nm, 1610 nm were chosen in this system. The detector contained ring source and round photodiode.
研制了一套基于近红外三波长的血溏浓度检测系统，其主要由光源、斩波器、探头及锁定放大器组成，3个波长分别为1200、1350和1610nm，探头采用圆－环式设计，并将源探间距设为理论分析的最佳距离3~5mm。
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