极型

An interesting and often-used circuit applying the bipolar junction transistor is the so-called current mirror, which serves as a simple current regulator, supplying nearly constant current to a load over a wide range of load resistances.

一个有趣且常用的双极型晶体管电路就是所谓的电流镜。这是一个简单的电流调整器，可以为很宽的负载范围提供几乎恒定的电流。

Simultaneously the model of bipolar junction transistor and CMOS transistor and the basic circuit units such as current mirrors are briefly introduced; with the topology and model circuit ,the principle and feature of the CC are analyzed. The applications of the CC in the fields of the active network and signal process are synthesized.

首先介绍了模拟集成电路在当代社会中的重要性和集成电路研究的必要性，并简要地介绍了双极型晶体管和CMOS晶体管的模型结构以及几种电流镜电路的原理及性能；从电流传送器的拓扑结构入手，在给出其模型电路的基础上，介绍了电流传送器的工作原理。

Before the outbreak of the cold wave, the strong cold air of high PV propagated down to the south of Lake Baikal, and was cut off by the low PV air of low latitude origin, forming a dipole-type circulation pattern with the low PV center in the northern part of the Eurasian continent and the high PV one in the southern part.

在寒潮爆发前期，高位涡强冷空气传播到贝加尔湖南侧，并被来自低纬度的低位涡空气所切断，在欧亚地区形成北部低位涡南部高位涡的偶极型环流。

The circuits, including 4 value TTL, NOR gate and NAND gate and AND OR NOT gate and five state gate, are designed by use of bipolar transistors. They have good I/O characteristics, great load capacity and robust noise immunity, and their noise margin may reach±0.6V.

采用双极型晶体管设计出了四值TTL"或非"门、"与非"门和"与或非"门电路及五态门，这些电路均具有较好的输入输出特性、较强的负载能力和抗干扰能力，噪声容限可达到± 0 。6V。

The main contents are: Status and prospects of micro/nano fabrication technology, semiconductor substrates, vacuum science and plasmas. Several unit processes of microfabrication like diffusion, thermal oxidation, ion implantation, optical and nonoptical lithography, etching, physical deposition, chemical vapor deposition and epitaxial growth. Process integration of these unit processes for example CMOS technique and silicon bipolar technique, microelectro mechanical systems and some nano fabrication technologies will be introduced.

主要内容有：微米/纳米制造技术的现状和展望、半导体衬底、真空科学和等离子体，各种单项微电子加工工艺，如扩散、热氧化、离子注入、光学和非光学光刻、刻蚀、物理淀积、化学气相淀积、外延生长等，以及各种单项工艺的集成技术，如CMOS技术和硅双极型工艺技术，并初步介绍微电子机械系统和纳米加工技术。

In the experiment focused on interannual changes, tripolar SST anomalies in North Atlantic are used to force GCM.

在强调年际变化的实验中，利用北大西洋地区三极型海温异常强迫大气环流模式，进行均衡实验和瞬变实验。

In the noise as a measure of defects in the devices, the energy distribution of oxid traps and the deep-level parameters in bipolar devices are determined by applying 1/f noise measurement and g-r noise measurement respectively.

在低频噪声用作器件缺陷表征方面，分别提出了双极型器件中氧化层陷阱能量分布的1/f噪声分析方法和深能级缺陷的g-r噪声分析方法。

The bipolar bandgap voltage reference circuit and an OPAMP, supply-independent biasing, were used in the design.

综合了带隙电压的双极型带隙基准电路和与电源电压无关的电流镜的优点。

The field is wide open for innovative approaches to the many quandaries posed by diseases such as HIV/AIDS, SARS and avian influenza to schizophrenia, bipolar disorder and a host of others.

以创新的方法治疗许多困惑人类已久的疾病，如艾滋病、SARS、禽流感、精神分裂症、双极型情感性异常等，有着广阔的发展空间。

The Doppler radar radial velocity field near a tropical cyclone center,which has characteristic of approximately axisymmetric distribution or Rankine vortex,has a particular dipole pattern distribution feature.

对于近似轴对称与类似兰金涡旋特性的台风近中心环流而言，其多普勒雷达径向速度场具有相当特殊的偶极型态分布特征。

Chrysanthemum of 10 thousand birthday is lax to edaphic requirement, with the arenaceous qualitative loam with fecund, good drainage had better.

万寿菊对土壤要求不严，以肥沃。排水良好的砂质壤土为好。

He unstepped the mast and furled the sail and tied it.

他拔下桅杆，把帆卷起，系住。