pnp transistor การใช้

• PNP transistors have two layers of p-type semiconductors sandwiching an n-type semiconductor.
• A PNP transistor will also work if the battery and LED are both reversed.
• In the latest CMOS processes, ? of vertical PNP transistors can even go below 1.
• Auxiliary outputs 1, 2, 3 are built with NPN / PNP transistor pairs for several reasons.
• Some DTL designs used two power-supplies with alternating layers of NPN and PNP transistors to increase the fanout.
• :The circuit you show won't work because the pnp transistor needs a current flowing between its base and the negative rail.
• PNP transistors had the round, black " top hat " style body, while NPN transistors had oval, black " top hats ".
• I have designed self-oscillating invertors using PNP transistors, so they can be made to work, but I would not try it for this application.
• Active high switching allows for maximum switching current, as the NPN transistor is also used to light the corresponding LED and switch the PNP transistor.
• Hole concentration is accumulated at emitter side in n-base layer because of impossibility of the hole flow through forward bias collector-base junction of the pnp transistor.
• The gate current makes an equivalent NPN transistor switch on, which in turn draws current from the base of an equivalent PNP transistor, turning it on also.
• I can diagram the difference between NPN and PNP transistors, tell you what an op amp is, write a little computer code and have been online since the days of 300-baud modems.
• In an MCS the positive difference between the voltage of regulation element and conduction voltage drop of MOSFET is applied to location between the collector region and emitter region of the pnp transistor.
• As in the case of a triggering in quadrant III, this lowers the potential of the n-layer and turns on the PNP transistor formed by the n-layer and the two p-layers next to it.
• The arrows in the NPN and PNP transistor symbols are on the emitter legs and point in the direction of the conventional current when the device is in forward active or forward saturated mode.
• The "'2N107 "'is an early germanium alloy junction PNP transistor developed by General Electric ( GE ) in 1955, to become GE's entry into the electronic hobbyist market successfully started with the CK722 transistor.
• This, in turn, causes the p, n and p layers over MT2 to behave like a PNP transistor, which turns on because its n-type base becomes forward-biased with respect to its emitter ( MT2 ).
• BJTs come in two types, or polarities, known as PNP and NPN based on the semiconductor junctions that share a thin p-doped anode region, and a PNP transistor comprises two semiconductor junctions that share a thin n-doped cathode region.
• Since the device used is an NPN transistor, V _ { out1 } is a positive going output while V _ { out2 } is a negative going output : using a PNP transistor reverses the polarities of outputs.
• The lower p-layer works as the collector of this PNP transistor and has its voltage heightened : actually, this p-layer also acts as the base of an NPN transistor made up by the last three layers just over the MT2 terminal, which, in turn, gets activated.