Resistor as a common electronic components, has been ninety years of history. With the rapid development of electronic technology, the electronic industry production of resistors as a basic part of weaving continues to advance. Due to the adoption of new technology and automated production lines, the current resistor from both the scale of production and quality have reached new levels all over the world every year approximately resistor.
The production of 500- 80000000000only, in the technology not only can make the high precision of 0.001% stable grade resistors, but also the production volume is very small to integrated circuits require resistance network.
Resistor ratio production has experienced a small to large, from elementary to advanced development process. In nineteenth Century resistors have used for electric power and weak technology, when compared to the original real resistors, widely applied to electronic technology, or from the20 horses in20 years time begin.
Countries in the resistor production and development has different characteristics, so far, synthetic carbon resistors are still the main varieties of Europe and the United States. Core resistors is the oldest one in nineteenth Century the first in the United States of America variety,1925 began mass production. This resistor reliability is relatively low, and has the advantages of simple process, low price.
Thermal decomposition of carbon film resistors in 1925 by the German invention,1930put into production, then one of Britain and the United States, Soviet Union and other countries. Carbon film resistor performance is good and simple production process has become one of the most important species resistor.
Evaporated metal film resistor from approximately 50midday generation to start production, is a kind of high stability, high quality non - wirewound resistors varieties. For more than 20 years continuously improve the quality of crop increases ceaselessly, is extremely promising resistor varieties. The recent development of the production process, for a small resistor output can be greatly improved, the future may gradually substituted carbon film resistor status into
The main products resistor.
Metal oxide film resistor and the United States began production in 1952. It is a kind of excellent heat resistance resistor, performance may be associated with metal film resistors to than, many countries have production.
Wire wound resistor is a long history of the breed, at present in the large power and high precision is holding significant position. Wire wound resistor due to high frequency performance limits its widespread use in electronic technology.
Recently with the metal foil made of metal film resistors in high precision has been exceeded wirewound resistors and has excellent high frequency performance, thus gradually replacing the wire wound resistor at high precision of position.
The potentiometer is a mechanical and electrical components, it can be converted into a mechanical displacement of a voltage change, generally by the resistor body and the movable brush. Recently except wire-wound potentiometer, and synthesis of carbon membrane, solid core, metal film, metal glaze and conductive plastic potentiometers and other varieties. In order to avoid mechanical friction, but also the development of the bucket contact type photoelectric potentiometer. From the output function characteristics
A bit line and a variety of function characteristics of the potentiometer. From shape and structure, it is the myriads of changes many varieties, not one one lists.
Sensitive resistor is a resistance value varies with temperature, light, voltage, mechanical, magnetic flux, humidity, gas and other external factors performance in number sense resistor. They can be used as the power goes into an electrical signal, the other hand can complete the circuit of some function, such as voltage, temperature compensation overvoltage protection switch and memory. The resistors while the development of an earlier, but recently by
With the development of science and technology, more and more species, is used more and more in cutting-edge science, military technology and each aspects of national economy has very important position.
In eighty, the development of integrated circuit makes the miniaturization of electronic components in the new era, the electronics industry structure happened to change deeply. But from look at present, the integrated circuit can not completely replace the discrete components. Because nothing elements have great flexibility element parameter range, high precision, good quality and there are many elements. Not integrated, still using discrete components to make up. So resistor many varieties in the future for a long period of time to continue development. The main direction of maximum reliability, high stability, high precision, low noise, high value, high power, high pressure nozzle, high frequency, miniaturization, resistor network, a potentiometer and a variety of sensitive resistor.