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MOSFET Symbol

MOSFET stands for Metal Oxide Silicon Field Effect Transistor or Metal Oxide Semiconductor Field Effect Transistor. This is also called as IGFET meaning Insulated Gate Field Effect Transistor. The FET is operated in both depletion and enhancement modes of operation. The following figure shows how a practical MOSFET looks like. Construction of a MOSFET The construction of a MOSFET is a bit similar to the FET. An oxide layer is deposited on the substrate to which the gate terminal is connected. This oxide layer acts as an insulator (sio 2  insulates from the substrate), and hence the MOSFET has another name as IGFET. In the construction of MOSFET , a lightly doped substrate, is diffused with a heavily doped region. Depending upon the substrate used, they are called as  P-type  and  N-type   MOSFETs . The following figure shows the construction of a MOSFET . The voltage at gate controls the operation of the MOSFET . In this case, both positive and n...
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What is Electrical Switch

What is an Electrical Switch : An electrical switch is any device used to interrupt the flow of electrons in a circuit. Switches are essentially binary devices: they are either completely on (“closed”) or completely off (“open”). There are many different types of switches, and we will explore some of these types in this chapter. Learn the Different Types of Switches : Switches can be of mechanical or electronic type, Mechanical switches  must be activated physically, by moving, pressing, releasing, or touching its contacts. Electronic switches  do not require any physical contact in order to control a circuit. These are activated by semiconductor action. Mechanical Switches : Mechanical switches can be classified into different types based on several factors such as method of actuation (manual, limit and process switches), number of contacts (single contact and multi contact switches), number of poles and throws (SPST, DPDT, SPDT, etc.), operation and ...
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Conductance: What is it? (Definition, Units & Formula)

Conductance: What is it? (Definition, Units & Formula) What is Conductance? Conductance (also known as electrical conductance ) is defined as the potential for a substance to conduct electricity Conductance is the measure of how easily electrical current (i.e. flow of charge) can pass through a material. Conductance is the inverse (or reciprocal) of electrical resistance, represented as 1/R. To have a better understanding of conductance, one must recall the resistance of an object. In a qualitative sense, the resistance tells us how difficult it is for an electrical current to pass. The resistance between two points can be defined in the quantitative sense as the difference in voltage that is needed to carry a unit current across the two specified points. The resistance of an object is represented as the ratio of the voltage across something to the current passing through it. The resistance is measured in Ohms. The conductance of a component is a determination of how quickly c...
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