模转换

However, the CMOS image sensors can provide stronger anti-radiation capacity than CCD as well as Single Chip Integrating with image sensors array, drive and control circuit, signal processing circuit, A/D conversion circuit and Completely Digital Interface Circuit. The CMOS image sensors also possess high quantum efficiency, wide spectral response, good response uniformity, low supply voltage and low request of clock. At the same time, the small bulk, high reliability, low power consumption and low cost are the prominent advantages of the CMOS image sensors too, thus CMOS image sensor has more exploiture foreground in X-ray real-time radioscopy imaging system.

由于CMOS 图像传感器比CCD 具有更强的抗辐射能力，还具有将图像传感器阵列、驱动和控制电路、信号处理电路、模数转换电路、全数字接口电路等实现单片集成以及量子效率高、光谱响应宽、响应均匀性好、工作电压低、对时钟脉冲要求低、体积小、重量轻、功耗低、高可靠、低成本等优点，因此在X 射线实时检测中更具有开发前景。

The polysemous development among the three verbs is explained in terms of the hypotheses about the frame-to-frame transferring and the conceptual schema requirement for triggering the individual verb in a frame to be transferred into another frame. Furthermore, among the three verbs, only biaoshiI is a fully representative member of the source domain, i.e., the Statement frame, and thus capable of being extended to other domains, i.e., the Encoding and the Evidence frames. Here, lexical membership in the source frame or frame-representativity is the key to semantic extension.

为了解释这三个动词语义差异的现象，我们指出了框架到框框间转换的假设和让一个动词从一个框架移动到另一个框假所需的概念基模要求，并且进一步提出「框架代表性」(frame-representativity)的原则，说明「表示」做为「来源领域」最具代表性的一个词汇，因此可以从「陈述性的框架」延展到其他的框架。

The main features of the system are: the communications line is not only used for data transmission but also responsible for the system control and management; only one analogue to digital converter is needed for the whole system; a digital trimmer which is analogous to the adjustable resister in function is installed to each sub—system.

本文所进行的数字型条干均匀度测试仪的系统设计，采用了多微处理器的分布式并行结构，提出了一种数字信号的总线结构，采取了数据预处理和数字微调等措施，其主要特点为：半双工异步通信线不但用于数据传输，而且还负责系统的控制和管理；整个系统只需一路模数转换器；各子系统均设有数字微调装置，其功能类似于模拟电路中的电位器，可独立进行参数调整。

Sample and hold circuit is an indispensable important circuit block, which almost determines the performance of the whole A/D converter.

采样保持电路作为模数转换器的必不可少的关键单元，很大程度上决定了ADC的性能。

A high performance CMOS sample and hold circuit for use in the front end of a l2bit 100MS/s ADC is presented.

介绍了一种用于12bit，100MS/s流水线模数转换器前端的采样／保持电路的设计。

Wind loading ; windmill vibration ; similarity model ; modal analysis ; similarity transformation ; optimization design.

风荷载激励；风刀机振动；相似模型；模态试验；相似转换；优化设计

The stable and reliable operation voltage of the probe can be given by the following methods:(1) 20% light coupling efficiency is obtained by direct coupling of LD-optical fiber.(2) The light power is transmitted by multi-model optical fiber.(3) The largest photo-electric conversion efficiency is achieved by selecting the transformer regulation of step-up transformer.(4) The stable light intensity is achieved by using LD light feedback of driving circuit and refrigeration.

通过下述方法可提供稳定、可靠的探头工作电压：LD—光纤的直接耦合方式，可实现20％左右的光耦合效率；采用多模光纤传输功率；选择升压变压器最佳变比提高光电转换效率；采取LD驱动电路光反馈以及致冷措施使其发光幅值稳定。

This invention relates to a window A/D converter used in digital supply controllers composed of a PMOS difference input pair, a CTAT offset current generation circuit, two loop oscillators and a digital part including two n-bit counters, one n-bit comparator, one n-bit subtracter and an n-bit D trigger, in which.

本发明属集成电路技术领域，具体为一种适用于数字电源控制器的窗口式模数转换器。它由一个PMOS差分输入对、一个CTAT偏置电流产生电路、两个环路振荡器和数字部分组成。数字部分由两个n位计数器、一个n位比较器、一个n位减法器、一个n位D触发器组成。

It explains abstraitively the working principle of A/D converter of full-parallel, seriesparallel and successive approximation type.

本文简介了瞬态记录仪的产生及发展，并介绍了它的核心部件模数转换器在瞬态记录仪中的应用。

The Difference Amplifier 差分放大器: The difference amplifier is the complement of the summing amplifier and allows the subtraction of two voltages or, as a special case, the cancellation of a signal common to the two inputs.

电路见图5，这种电路在运算电路中相当有用，比如差分对单端的转换，抑制共模信号。

Breath, muscle contraction of the buttocks; arch body, as far as possible to hold his head, right leg straight towards the ceiling (peg-leg knee in order to avoid muscle tension).

呼气，收缩臀部肌肉；拱起身体，尽量抬起头来，右腿伸直朝向天花板（膝微屈，以避免肌肉紧张）。

The cost of moving grain food products was unchanged from May, but year over year are up 8%.

粮食产品的运输费用与5月份相比没有变化，但却比去年同期高8％。