The MOS transistor:
The most fundamental element in the design of large scale integrated circuit is the transistor. For the processes we will illustrate, the type of transistor accessible is the Metal Oxide Semiconductor Field Effect Transistor (or MOSFET). Such transistors are formed as a “sandwich'' comprising of a semiconductor layer, generally a slice, or wafer, from a single crystal of the silicon; a layer of silicon dioxide (that is, the oxide) and a layer of metal. Such layers are patterned in a way that allows transistors to be made in semiconductor material (that is, the “substrate''); a diagram exhibiting a typical (or idealized) MOSFET is as shown in figure below. Silicon dioxide is an excellent insulator, therefore a very thin layer, usually only a few hundred molecules thick, is needed. In reality, the transistors which we will employ do not use metal for their gate regions; however rather use polycrystalline silicon. Polysilicon gate FET's have substituted virtually all of the older devices employing metal gates in large scale integrated circuits. (Both polysilicon and metal FET's are sometimes termed to as IGFET's --- insulated gate field effect transistors, as the silicon dioxide beneath the gate is an insulator).
The transistor comprises of three regions, the “source'', the “gate'' and the “drain''. The region as the gate region is in fact a “sandwich'' comprising of the underlying substrate material, that is a single crystal of semiconductor material (generally silicon); a thin insulating layer (generally silicon dioxide); and an upper metal layer. The electrical charge or current, can flow from the source to drain based on the charge applied to gate region. The semiconductor material in source and drain region are “doped'' with a different kind of material than in the region beneath the gate, therefore an NPN or PNP type structure exists among the source and drain region of a MOSFET. If the source and drain regions are doped with N-type material and the substrate doped with P-type material. Then such a transistor is termed as N channel MOSFET. When they were doped with P-type material, and substrate doped with the N-type material then the device would be termed as P channel MOSFET.
Operating modes:
• Accumulation• Depletion• Inversion
Latest technology based Electrical Engineering Online Tutoring Assistance
Tutors, at the www.tutorsglobe.com, take pledge to provide full satisfaction and assurance in Electrical Engineering help via online tutoring. Students are getting 100% satisfaction by online tutors across the globe. Here you can get homework help for Electrical Engineering, project ideas and tutorials. We provide email based Electrical Engineering help. You can join us to ask queries 24x7 with live, experienced and qualified online tutors specialized in Electrical Engineering. Through Online Tutoring, you would be able to complete your homework or assignments at your home. Tutors at the TutorsGlobe are committed to provide the best quality online tutoring assistance for Electrical Engineering Homework help and assignment help services. They use their experience, as they have solved thousands of the Electrical Engineering assignments, which may help you to solve your complex issues of Electrical Engineering. TutorsGlobe assure for the best quality compliance to your homework. Compromise with quality is not in our dictionary. If we feel that we are not able to provide the homework help as per the deadline or given instruction by the student, we refund the money of the student without any delay.
Theory and lecture notes of Consumer Preference Theory all along with the key concepts of Assumptions about the consumer preferences, Cardinal vs. Ordinal Utility, Utility Surface, Diminishing MU, Properties of Indifference Curves. Tutorsglobe offers homework help, assignment help and tutor’s assistance on Consumer Preference Theory.
tutorsglobe.com association of kp and kc assignment help-homework help by online attainment of equilibrium in chemical reactions tutors
tutorsglobe.com breeding for disease resistance assignment help-homework help by online breeding experiments tutors
For Hand Winding method, four numbers of slot feeders are laced in the two selected slot at a distance from the coil pitch.
nuclear reactor tutorial all along with the key concepts of classification of nuclear reactors, components of nuclear reactors,boiling-water reactor,pressurized-water reactor, fast breeder reactor
Color Chemistry and Technology tutorial all along with the key concepts of electromagnetic radiation, compound promotes electrons, conjugated double bonds, Three rings fused together
tutorsglobe.com type of pollen entry assignment help-homework help by online double fertilization tutors
Filter Circuits tutorial all along with the key concepts of Shunt Capacitor Filter, Load Current, Diode Current, Effect of increasing filter capacitance, Series inductor filter, Choke Input or L-C Filter, Ripple Factor, Bleeder Resistor
www.tutorsglobe.com assignment help tutorials, for various scientific method in operations research and role of computers in or. the scientific method in or study usually includes three phases.
tutorsglobe.com significance of factoring assignment help-homework help by online factoring tutors
Inbreeding and its consequences tutorial all along with the key concepts of Genetic Effects of Inbreeding, Closest Form of Inbreeding, coefficient of inbreeding, Full sib mating, Inbreeding depression
Modern Techniques in Immunology and Immunochemistry tutorial all along with the key concepts of Recent Techniques in Immunology and Recent Techniques in Immunochemistry
tutorsglobe.com reproduction in algae assignment help-homework help by online algae tutors
Case study of viral diseases tutorial all along with the key concepts of Acquired Immunodeficiency Syndrome (AIDS), Virology, Major Signs, Diagnosis, Treatment, Vaccines, Rabies, Epidemiology, Pathogenesis and Pathology, Clinical Features/Symptoms, Incubation Period, Isolation/Diagnosis and Control of rabies
Most large businesses are busy in a number of dissimilar operations, with each containing its own levels of profitability, growth and risk.
1964695
Questions Asked
3689
Tutors
1475969
Questions Answered
Start Excelling in your courses, Ask an Expert and get answers for your homework and assignments!!