What does the arrow in a transistor mean?
The arrow indicates the direction of flow of holes i.e. the direction of conventional current, opposite to the flow of electrons in a transistor.
Which side of a MOSFET is the source?
From a circuit perspective, the “source” of an Nchannel MOSFET is the terminal at the LOWER voltage and the “drain” of an Nchannel MOSFET is the terminal at the HIGHER voltage.
What does the arrow on the PNP transistor symbol from emitter to base stand for?
The arrow indicates the order of the junction (base to emitter or emitter to base). An NPN has stacked N, P, and N doped channels. The PN junction (between base and emitter) goes from the center out. PNP likewise is the opposite.
Where does the arrow point in a MOSFET?
The substrate and the channel in a MOSFET forms a PN junction. Knowing this, the arrow is much like a diode symbol. With the NMOS, where it has an N channel, the arrow points from the P-type substrate to the N-type channel. With the PMOS, the arrow points from the N-type substrate to the P-type channel.
How is a diode symbol like a MOSFET symbol?
The best way to remember this is with two facts: A diode symbol points from the P to the N of a PN junction. The substrate and the channel in a MOSFET forms a PN junction. Knowing this, the arrow is much like a diode symbol.
Where are the source and drain connections in a MOSFET?
The V Mosfet has two source connections, a gate connection on top, and a drain connection on the bottom. The channel is induced vertically along both sides of the V-shaped groove between the drain (n+ substrate where n+ means a higher doping level than n– ) and the source connections.
What are the characteristics of a conventional enhancement MOSFET?
The conventional enhancement MOSFETs have a long thin lateral channel as shown in the structural. This results in a relatively high drain-to-source resistance and limits the E-MOSFET to low power applications. When the gate is positive, the channel is formed close to the gate between the source and the drain, as shown.