DS

Classification of Timers Timers may be classified in the following ways. 1.        According to the function performed by it. They are                (A)     Delay timers                (B)      Interval timers                (C)      Repeat cycle timer                (D)     Reset timer 2.        According to the technique used to achieve the industrial timing                               (A)  Ther rmal timers                (B)      Electromechanical timers                (C)      Electrochemical t...

Field Effect Transistor (FET) A field effect transistor is abbreviated as a FET. It is a semiconductor device in which the current is controlled by an electric field. A FET is an example of a unipolar device it works only depending on the majority carriers. FETs are voltage controlled devices, in contrast to bipolar transistor which are current controlled. Classification of FET FETs are basically classified in to two categories. 1.        Junction field effect transistors ( JFET simply called as FET ) 2.        Metal Oxide semiconductor Field Effect Transistor ( MOSFET ) The MOSFETs are also called as insulated gate field effect transistor (IG GET). MOSFETs are again two types. (a)       Enhancement mode MOSFET (b)      Depletion mode MOSFET Structure of FET FET can be of n channel or p channel. The structure of n-channel and p-channel FETs are shown in fig. let us consider-channel F...