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Transistor, is one of the basic components of a semiconductor, a current amplification, is a core component of electronic circuits. Transistor is formed on a semiconductor substrate PN junction of two closely spaced, two PN junctions block the positive semiconductor divided into three parts, the middle part of the base, two side portions are emitting region and a collector region, the arrangement has PNP and NPN two kinds. Transistor used in the circuit "Q" plus numerals, such as: Q17 indicates the number of the transistor 17. Features: transistor (referred to as transistor) is interior includes two PN junction, and a special device to enlarge capacity. It points NPN and PNP type of two types, both types of transistors can compensate for each other from the operating characteristics of the so-called OTL circuit tube is made PNP type and NPN type paired. Commonly used telephone PNP transistor has: A92,9015 other models; NPN type transistor has: A42,9014,9018,9013,9012 models. EC2345 navigation network is a collection of the world's leading electronic components site navigation network, which is purchasing in the electronic manufacturing industry, the various needs of engineers and other positions who summarize and categorize a URL station. As electronic manufacturing product categories and many sites such as technical information, and EC2345 is to facilitate the people in the line more quickly and accurately find the site entrance, resolve within electronics manufacturing industry chain people in a variety of precise needs, including: to find channels, find products, find technology to find the gang, looking for work, looking for finance. IC is a special process, transistors, resistors, capacitors and other components integrated device having functionality is formed on a silicon substrate, the abbreviation for the IC, also known as chips. Analog IC is defined by capacitors, resistors, transistors and other components used to process the analog signal integrated analog integrated circuits. There are a lot of analog integrated circuits, such as integrated operational amplifiers, comparators, logarithmic and exponential amplifiers, analog multiplication (division) Implement, PLL, power management chips. Analog integrated circuits constituting main circuit has: an amplifier, a filter, a feedback circuit, a reference circuit, a switched capacitor circuit. Analog IC design is mainly carried out by experienced designers manual circuit debugging, simulation and obtained, and this corresponds to the digital IC design description language mostly under the control of the integrated EDA software automatically generated through the use of hardware. EC2345 navigation network is a collection of the world's leading electronic components site navigation network, which is purchasing in the electronic manufacturing industry, the various needs of engineers and other positions who summarize and categorize a URL station. As electronic manufacturing product categories and many sites such as technical information, and EC2345 is to facilitate the people in the line more quickly and accurately find the site entrance, resolve within electronics manufacturing industry chain people in a variety of precise needs, including: to find channels, find products, find technology to find the gang, looking for work, looking for finance. Our services: We are a group of people to explore the border, for all users and students - is the source of our existence and development of our social values:! Propelled electronics manufacturing transformation and upgrading of the Internet, electronic manufacturing revolution black chain, reshape the electronics manufacturing industry development pattern!