One of the notable things about the Electronics devices and circuits field, as in various areas of technology, is how few the fundamental principles can change over time. The systems are extremely smaller, current speeds of operation are truly extraordinary, and new gadgets surface every day, leaving us to wonder where the technology is leading us. However, if we take some time consider that the majority of all the devices in use were invented decades ago and that design techniques appearing in texts as far back as in the year 1930s are in use still, we realize that most of what we see is a steady improvement in the construction techniques and application of those devices rather than development of the new elements and fundamentally new designs. The result is that most devices discussed in this have been around for some time, and that texts on subject written years ago are still good references with content that has not changed very much. The majority of changes have been in the understanding of how these devices work and their full range of capabilities and improved methods of teaching the fundamentals connected with them. The benefit of all this to the new student of the subject is that the material in this text will, we hope, have reached a level where it is relatively easy to grasp and the information will have application for years to come.
The miniaturization which has occurred in the recent years leaves us to wonder about its restrictions. Complete systems now appear on wafers thousands of times smaller than single element of the former networks. The first integrated circuit (IC) was developed by the scientist Jack Kilby while working at the Texas Instruments in the year 1958. Today, the Intel Pentium 4 processor has over 42 million transistors and host of the other components. The recent advances suggest that 1 billion transistors will be placed soon on a sliver of silicon smaller than the fingernail. We have certainly reached a point where primary purpose of container is simply to provide some means for handling device or system and to provide the mechanism for attachment to the remainder of the network. Further the miniaturization appears to be limited by the 3 factors: the network design technique, the quality of semiconductor material, and the limits of manufacturing and processing equipment.This is the first device to be introduced here is simplest of all the electronic devices, yet has a variety of applications which seems endless. We devote two topics to the device to introduce materials usually used in solid-state devices and review some of the fundamental laws of the electric circuits.
Area of Learning under Electronics devices and circuits
semi-conductors and its material properties of, Governing factors for Fermi-Level, Carrier concentration & carrier mobility, Carrier drift; Diffusion, ; Recombination & carrier life time and continuity equation. Quantitative analysis of p-n diode characteristics & equivalent circuit, Schottky barrier diode, Ohmic contact, BJT moderls-low-frequency and high frequency hybrid models, Ebers-Mill model. Transients in diodes and transistors, low and high frequency models of JFET, MOS devices
NMOS, PMOS and CMOS. Coupling schemes for multistage, amplifiers, Wide band amplifiers, Power amplifier, Transistor biasing schemes and operating point stabilization. Feedback concepts, Analysis of negative feedback amplifiers, condition for oscillation, analysis of various oscillators.
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