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Electrical Definitions |
Planar Process : The method of fabricating semiconductor junction devices in which a layer of silicon dioxide is grown on silicon substrate of required conductivity. |
PN Junction : A two terminal solid state junction made from a semiconductor that has been treated to conduct current more readily in one direction than in the other. |
PNPN Device : A three junction semiconductor device normally silicon with alternative p-type and n-type layers.It is used for power switching purposes. |
PNP Transistor : A semiconductor device where the collector and emitter are made from p-type semiconductor material while the base is made from n-type material. |
Pocketing : Mass removal of material within a predetermined boundary by means of NC machining. |
Power Amplifier : An RF or AF amplifier that delivers maximum output power to a load rather than providing a maximum voltage gain. |
PPI (Plan Position Indicator) : A display used in radars for observing target returns in the form of a bright spot on the screen. |
Priority Encoder : A digital logic circuit that produces a coded output corresponding to the highest valued input. |
Propogation Delay : The time interval between the occurrence of an input transition and the corresponding output transmission. |
Pulse : A momentary,sharp change in a current,voltage or other quantity that is normally constant,characterised by a rise and fall of finite duration various pulse parameters are shown inside. |
Push Pull Amplifier : An amplifier that uses two similar vaccum tubes or transistors with their grid or base leads connected in phase opposition while the plate or collector leads are connected in parallel to a common load. |
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