In this paper, the principle of RF-sampling frequency down-converter is discussed.

Purpose: High frequency amplifier applications, FM, RF , MIX , IF amplifier applications.

用途: 用于高频放大, 调频 、 射频、混频 、 中频放大.

In chapter 4, a IF receiver sub-system has been designed.

第4章描述了中频子系统的设计与实现.

The paper introduced the basic prinple of filtering harmonic voltage.

本文介绍了中频谐波电压滤除的基本原理.

Intermediate frequency instability has had the most uneven history.

中频不稳定性的研究经历了极为曲折的道路.

To investigate the effect of titanium nitride coating on corrosion resistance of dental casting alloys.

研究氮化钛涂层对牙科铸造合金腐蚀性能的影响.

Ti, Al N super-hard films were deposited by multi-arc ion plating.

采用多弧离子镀技术沉积氮化钛铝超硬反应膜.

Theprinciple , preparation methods , properties and applications of nano film materials have beensummarized.

本文介绍了离子束溅射和磁控溅射技术的基本原理 、 法及其在制备纳米材料中的应用和优点,以国内外这方面的最新进展.

In order to improve the charge distribution for MEVVA ion source, a radial field was introduced.

为解决麦瓦(MEVVA)离子源束流的径向分布均匀性问题,采取了加入会切磁场的方法.

Spectrum diagnosis as an experimental method, is convenient and irreplaceable in ion source investigation.

本文列举了光谱诊断方法在离子源研究中的几种典型应用.

The theory of ion etching and the parameter of ion source designing are discussed in detail.

并且详细论述离子刻蚀的原理以及离子源的参数设计.

The ion energy and its distribution were investigated by a 5-grid tester.

采用五栅网离子能量测试装置研究了离子源的离子能量及能量分布.

All my life I shall remember oriental music and you in my arms. Perfumed flowers in your tresses , lotus centred breezes and swaying palms.

我一辈子都会记得东方音乐和妳在我怀中的情景，妳的鬈发插上了弥漫香味的花朵，棕榈树在飘着莲花香的微风中摇曳。

All chickens have combs on their heads, but they do not always look the same.

鸡都有鸡冠, 但它们看上去并不总是都一样.

A cock a rd comb on its head. Its feathers are very beautiful.

公鸡头上有红色的鸡冠. 它的羽毛非常漂亮.

Something a fowl's comb in appearance or position.

'鸡冠'.''''.'状'.''的东西在外形或位置上使人想到''.'鸡冠'. ''的东西.

Sometimes the combs of chickens are affected.

鸡冠有时也会受到伤害.

The chicken's beak, the comb and some feathers were visible.

而且像是鸡嘴, 鸡冠,还有一些羽毛都是清晰可见.

The Nd: YAG laser illumination ranged from 20 to 60 W.

动物模型的选择为 猪肝 及鸡冠.

Nello had already seized and flourished his comb.

内洛已经拿起梳子在挥舞.

I stared at the comb, then at her.

我看看梳子, 又看看她.