The main difference between a BJT and a MOSFET is that, a BJT operation depends on current and needs to be proportionately increased with the load, whereas a mosfet depends on voltage. But here the MOSFET gets an edge over a BJT, because voltage can be easily manipulated and achieved to t...
The transistor is made of two PN junctions very close to each other on a semiconductor substrate. The two PN junctions divide the whole semiconductor into three parts. The middle part is the base area, and the two sides are the emitter and collector areas. PNP And NPN are the two kinds ...
Image used courtesy of Simon Munyua Mugo In the circuit above Rb is required for limiting the output current from the digital logic gate. PNP transistor Switch A PNP transistor can be used in the same way as an NPN transistor. The difference is that in PNP, the load is always connected ...
PNP-transistor works as a switch: The Emitter potential for aPNPtransistor needs to be positive with respect to the Base. The transistor then functions as a solid-state "single-pole single-throw"(SPST)switch. The transistor becomes "OFF," operating like an open switch when a zero signal is...
As its case temperature tends to increase, the current through the transistor also increases, which forces the device to heat up further. The process gets into a kind of chain reaction heating the device rapidly until the device becomes too hot to sustain and gets permanently damaged. This situ...
Comparison between a PNP transistor and P-channel MOSFET: When the gate voltage is 4v LOWER than rail voltage, the MOSFET turns ON. The 10k resistor on the base of the transistor is needed to prevent the base current exceeding the amount of current needed by the transistor to deliver current...
region” or “ON mode” when using a bipolar NPN transistor as a switch as being, both the junctions are forward biased, IC = Maximum, and VB > 0.7v. For a PNP transistor, the Emitter potential must be +ve with respect to the Base. This is theworking of the transistor as a switch...
So for each of these types of transistor, there are at least two ways to draw it. Bipolar Junction Transistors (BJTs) BJTs are three-terminal devices; they have a collector (C), emitter (E), and a base (B). There are two types of BJTs -- NPNs and PNPs -- and each has its ...
One 7CT1N will test a PNP and while it is in place the second 7CT1N can be used to select a transistor that is closely matching as pair. There are two curves worth paying attention when comparing two complementary transistors. The first Step in the curve closer to zero should be ...
A negative Base voltage on a PNP transistor will allow current to flow. Here's two transistor circuits that look and function very much like tube amp circuits. The first is the transistor common emitter amplifier: Tube triode amp circuit on the left, transistor common emitter amp on the ...