共查询到20条相似文献,搜索用时 62 毫秒
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文章在对带隙基准基本原理与电路结构分析基础上,介绍了一种高精度、低功耗、高电源抑制比的BiCMOS带隙基准电压源电路。该电路的实现是基于0.6μm、5V的BiCMOS工艺。仿真结果表明,该基准电路稳定工作电源电压范围为1.9V~6.4V,在低频下的电源抑制比可达到-88dB,温度变化范围从-25℃至150℃时,温度系数为9.73×10^-6,输出电压误差为1.72mV。 相似文献
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采用0.5μm CMOS工艺设计了一种高精度低压基准电压源.提出了一种结构比较新颖的基准电压源电路,该基准电压源电路具有较低的温度系数、较大的温度范围和较高的电源抑制比.此外,还增加了提高电源抑制比电路、启动电路,以保证电路工作点正常、性能优良,并使电路的静态功耗较小.Spice仿真结果表明低频时电源抑制比可达70dB;在-40~120℃范围内,输出变化仅为0.004V,温度系数可达25×10-6V/℃;静态功耗小,在电源电压Vdd=3.3V时,总功耗约为0.025mW. 相似文献
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KERRY Lacanette 《仪表技术与传感器》2006,(5):61-62
介绍了比例输出传感器与A/D转换器之间的配合使用情况。设计了传感器测量电路,包括比例输出传感器、电流驱动电桥和惠斯通电桥。将ADC的基准电压输入和传感器输出结合在一起,节省了电压基准或电流源。该设计降低了电路整体成本,提高了温度稳定性和测量精度,降低了温漂,减少了线路板面积,消除了不理想的基准源引入的误差。 相似文献
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提出了一种低压高阶曲率补偿的CMOS带隙基准电路。电路采用电流模BGR结构,采用对VBE的线性补偿方法。利用BISM 3模型,电源电压可在5V,在-55—125℃温度范围内,温度系数为6.034ppm/℃。在低电源电压,低频下PSRR为-73dB。整个带隙基准电压源具有好的综合性能。 相似文献
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This paper presents a group solid-state voltage reference source based on 7 V zener diodes. The source is software monitored and controlled in order to achieve the stability of the reference voltage required for the national level standard. Self-control of the voltage source is made feasible by a special design, which includes controllable voltage reference elements, integrated measurement system and software prediction of the reference voltage. By application of the control loop, some phases of the procedure of screening and selection of voltage reference elements can be relinquished or simplified. This entails a drastic cost reduction. Self-control of the voltage reference source also has a great impact on the extension of the intercalibration interval. 相似文献
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A. I. Erokhin A. S. Medvedko D. N. Skorobogatov P. A. Selivanov 《Instruments and Experimental Techniques》2010,53(2):240-245
A power system based on regulators connected in a pulse-width modulation (PWM) half-bridge circuit with up-to-date power IGBT
switches. The system ensures the four-quadrant operation with an out-put voltage of up to 600 V and current of up to 500 A.
The control system is based on a digital signal processor and ensures all necessary measurements, interlocks, PWM signal generation,
and communication with the computer. 相似文献
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近年来,为了减小共模电压对电压源逆变器的影响,模型预测共模电压抑制方法得到广泛研究。然而,常规的电压源逆变器模型预测共模电压抑制方法每个控制周期仅采用一个非零电压矢量作用,导致其电流谐波较大。为此,提出了一种混合多矢量模型预测共模电压抑制方法。首先给出了所提多矢量模型预测共模电压抑制方法的实现原理。其次详细分析了死区和电流纹波对共模电压的影响,并进一步对所提多矢量法进行改进。改进的方法在电流扇区7内使用单个非零电压矢量作用,而在其他扇区内使用多个非零电压矢量作用,从而不仅可以完全将共模电压限制在±Vdc/6之内,而且可以减小电流的总谐波畸变率。仿真和实验结果验证了该方法的有效性。 相似文献
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电压基准是提供一个精确的输出电压,作为电路系统或负载的精确参考电压,因而称其为基准。在测量仪表中,模拟信号和数字信号的相互转化就需要满足精度要求的电压基准。本文从实际应用的角度介绍了电压基准的种类、特点及其主要技术参数,选用电压基准的方法和注意事项。 相似文献
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In dynamics of evaporation or drying of microdrops from a solid surface, a faster and precise quartz crystal microbalance (QCM) is needed. The fast QCM based on frequency to voltage converter is an attractive and powerful tool in the investigation of the dynamic regime of evaporation to translate the frequency shift in terms of a continuous voltage change. The frequency shift monitoring in fast QCM applications is a real challenge for electronic processing interface. Originally developed as a frequency shift processing interface, this novel passive frequency to voltage converter can produce faster, stable, and accurate results in regard to the QCM sensor behavior. In this article, the concept and circuit of passive frequency to voltage converter will be explained followed by static and dynamic characterization. Experimental results of microdrops evaporation will be given. 相似文献
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Akash Kumar Anindya Debnath Antar Banik Kabirul Islam Mondal Partha Pratim Biswas Rik Bhattacharyya T K Maiti 《测试科学与仪器》2017,8(1)
研制了基于定时器的压频转换器, 电路主要由工作于非稳态多谐振荡器模式下的定时器LM555和两个光敏电阻构成. 由于数字存储振荡器测得的定时器输出波频率与所施加的输入电压基本呈线性比例关系, 所研制的转换器为类数字输出, 因此具有线性输入/输出关系、 体积小、 易携带和高性价比等优点. 此外, 定时器输出波可以直接与PC机、 微处理器或微控制器相连, 不需要模/数转换器就能完成对输入电压信号的进一步处理. 相似文献
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R. Hamerlik 《Scanning》1989,11(1):21-23
It is shown that a change in the SE current is opposite and equal in magnitude to a change in the absorbed current. Thus using the effect of potential contrast, allows measurement of voltage changes on a specimen by means of changes in the absorbed current. The present method offers a new possibility to complementary information, which can be helpful in various cases. 相似文献