查询词典 DC

DC:dc coupling,all signal are directly connected to attenuator.

DC：直流耦合，所有信号都直接连接到衰减器。

This DC side APF is shunted at the DC side of rectifier bridge.

该DC侧APF并联在整流桥的直流侧。

In the course of design and analysis for Buck DC/DC converter, it is very important to analize the output voltage ripple formed in operating.

在Buck DC/DC变换器的分析与设计中，对开关工作时所形成的电压纹波的分析是至关重要的。

The relationship between output voltage and capacitance in switched-capacitor DC-DC converter was investigated,and the reasons for output voltage ripple in the converter were analyzed.

研究了开关电容DC-DC变换器输出电压与电容的关系，分析了变换器输出电压波纹产生的原因。

The AC ripple present on DC link voltage depends on the valueof the DC link capacitor C.

在DC连接电压出现的AC波纹取决于DC连接电容器 C 的值。

The paper is based on the project"Theoretical Research and Design of KeyTechnique for Power Management IC". And it mainly deals with the design of highefficiency synchronous Buck DC/DC converter with novel soft start IC.

本论文基于西安电子科技大学科研项目&电源管理类集成电路关键技术理论研究及设计实现&，主要研究带有新型软启动的高效同步降压型DC/DC转换器的工作原理和电路设计。

This paper attempts to associate PFC technology with Quasi-Resonant DC/DC Converter and Synchronous Rectifier technology, to work out a novel switching power supply with higher efficiency and low contamination, which both achieved high power factor, improved effecting on electrical network and ensured high efficiency, furthermore, it is easy to be realized and controlled in circuit.

本文首先阐述了开关电源、功率因数校正技术和同步整流技术的发展及现状，对DC/DC变换的拓扑结构进行了选择，确定了带有隔离的准谐振(Quasi-Resonant)反激型电路，可以有效地降低损耗；接着本文对几种常见的PFC拓扑电路进行分析对比，从中选择了BOOST型电路，对工作在临界状况下的电路进行了分析，采用跟随输入电压的升压变换新技术，减小了电感体积，同时降低了开关管的电压应力，既简单又有效地实现了功率因数校正，并发现此技术值得推广；由于反激型变换器的效率一般都较低，所以本文在传统同步整流技术基础上对其加以改进，设计出一种新颖、高效的同步整流方案。

A new type high efficiency synchronous step-up DC/DC converter for hand-held device is designed in this thesis. It works in the PFM mode, and its switching frequency can up to 500 KHz. It offers a built-in synchronous rectifier that reduces size and cost by eliminating the need for an external Schottky diode and improves overall efficiency by minimizing losses.

本文设计了一种用于移动电子设备的高效同步整流的DC/DC升压芯片，该芯片采用PFM调制方式，工作频率最高可达500 KHz，内部集成功率管作为同步整流管，代替传统的肖特基二极管，导通电阻仅有0.4？

Crossreference this defense with the attack mode on Table 4-1: Psionic Combat DC Modifiers to get the appropriate modifier to your will save DC.

在表4-1&心灵战斗DC调整值&中查该防御模式和攻击模式以获知你意志豁免DC的相应调整值。

The expression levels of DC surface molecule were analyzed by flow cytometry and the ability of DC to induce T lymphocyte proliferation were evaluated by a liquid scintillation counter and the amounts of cytokines in MLR were measured.

研究表明，慢性乙型肝炎患者存在DC表型及功能缺失，可能是由于其共刺激分子表达降低或细胞因子产生减少所致，提示DC在乙型肝炎的发病中起一定作用[2]。

In the negative and interrogative forms, of course, this is identical to the non-emphatic forms.

。但是，在否定句或疑问句里，这种带有"do"的方法表达的效果却没有什么强调的意思。

Go down on one's knees;kneel down

屈膝跪下。。。下跪祈祷