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|  | | 为了更好的帮助您理解掌握查询词或其译词在地道英语中的实际用法,我们为您准备了出自英文原文的大量英语例句,供您参考。 | |
Evaluation of total muscular activity by quantification of electromyograms through a summing amplifier
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The detection system consists of two solid 7.6 cm×7.6 cm NaI(T1) detectors connected to a summing amplifier and mounted at 180° with respect to a uniaxially rotated sample container.
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A single loop pneumatic transfer system automatically moves samples to the irradiation position and returns them to a counting position between two NaI(Tl) detectors operated through a summing amplifier.
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Because MAX435 and MAX436 outputs are highimpedance current sources, you can create a summing amplifier simply by tying two or more outputs together.
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For hand-held operation, the BLR logic pulse is used for signal recognition and controls the gate of the summing amplifier.
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| | At the first, a method of improving A/D conversion resolution is presented. The basic principle is that several standard voltages are introduced at the input of a summing amplifier. These voltages are able to counterbalance a part of input voltage. As long as the standard voltages are composed and used according to the stipulative rule, a higher resolution can be conveniently obtained by using a lower resolution A/D converter under the control of a computer. Then, an example of a 8 bit A/D conveter used to ... | | 本文提出了一种提高A/D转换分辨率的新方法,即程控电压抵消法。它的基本原理是:在加法放大器的输入端引进若干个标定电压,此电压能抵消一部分输入电压,只要将标定电压按照一定的规律加以组合引入,就能在计算机程序控制下很方便地用较低分辨率的A/D转换器获得较高的分辨率。接着,较详细地介绍了一个用8位A/D转换器获得10位分辨的应用实例,并给出了电路图和控制程序流程图。最后进行了误差分析。实践证明,在计算机的配合下,适当提高A/D转换的分辨率,并保证其精度是可能的 | | 文摘来源 | |   |
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