We will present the important characteristics of each of IC families You will be much better prepared to do analysis, troubleshooting, and some design of digital circuits 8-1 Digital IC Terminology Current and Voltage Parameters : Fig.
8-4 참조 8-1 Digital IC Terminology In this chapter
Integrated circuits have drastically reduced the amount of electrical power needed to perform a given function Integrated circuitry typically requires less power than their discrete counterparts the saving in power supply costs a system does not require as much cooling There are some things that Integrated circuits cannot do Integrated circuits can not handle very large currents or voltages (because the heat generated in such small spaces would cause temperatures to rise beyond acceptable limits) Integrated circuits can not easily implement certain electrical devices such as inductors, transformers, and large capacitors For these reason Integrated circuits are principally used to perform low-power circuit operations that are commonly called information processing The operations that require high power levels or devices that can not be integrated are still handled by discrete components Various Logic Families Bipolar transistors : TTL and ECL Unipolar MOSFET transistors : NMOS, PMOS, and CMOS * Transistor의 작용은 carrier로서 1) Electron 과 Hole, 모두의 이동 을 이용하는 Bipolar 2) Electron 또는 Hole 중 하나만 의 이동을 이용하는 Unipolarģ min, max 는 Fig. Most of the reasons that modern digital systems use integrated circuits Integrated circuits pack a lot more circuitry in a small package the overall size of any digital system is reduced the cost is dramatically reduced because of the economies of mass-producing large volumes of similar devices Integrated circuits have made digital systems more reliable by reducing the number of external interconnections Discrete components(transistor, diode, resistor, etc.) are protected from poor soldering, breaks or shorts in connecting paths on a circuit boardĢ There are some things that Integrated circuits cannot do
Introduction Digital IC technology has advanced rapidly(Chap 4) Moore’s Law The number of components that can be packed on a computer chip doubles every 18 months while price stays the same.
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